485BPOS
Vanguard Core Bond Fund
Prospectus
January 31, 2024
Investor Shares & Admiral™ Shares
Vanguard Core Bond Fund Investor Shares (VCORX)
Vanguard Core Bond Fund Admiral Shares (VCOBX)
This prospectus contains financial data for the Fund through the fiscal year ended September 30, 2023.
The Securities and Exchange Commission (SEC) has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Contents

Fund Summary
Investment Objective
The Fund seeks to provide total return while generating a moderate level of current income.
Fees and Expenses
The following tables describe the fees and expenses you may pay if you buy, hold, and sell Investor Shares or Admiral Shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.
Shareholder Fees
(Fees paid directly from your investment)
 
Investor Shares
Admiral Shares
Sales Charge (Load) Imposed on Purchases
None
None
Purchase Fee
None
None
Sales Charge (Load) Imposed on Reinvested
Dividends
None
None
Redemption Fee
None
None
Account Service Fee Per Year
(for certain fund account balances below $5,000,000)
$25
$25
Annual Fund Operating Expenses
(Expenses that you pay each year as a percentage of the value of your investment)
 
Investor Shares
Admiral Shares
Management Fees
0.18
%
0.09%
12b-1 Distribution Fee
None
None
Other Expenses
0.02
%
0.01%
Total Annual Fund Operating Expenses
0.20
%
0.10%
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Examples
The following examples are intended to help you compare the cost of investing in the Fund's Investor Shares or Admiral Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund's shares. These examples assume that the shares provide a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
 
1 Year
3 Years
5 Years
10 Years
Investor Shares
$20
$64
$113
$255
Admiral Shares
$10
$32
$56
$128
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 439% of the average value of its portfolio.
Principal Investment Strategies
The Fund invests in fixed income securities of various maturities, yields, and qualities. Under normal circumstances, the Fund will invest at least 80% of its assets in bonds, which include fixed income securities such as corporate bonds; U.S. Treasury obligations and other U.S. government and agency securities; and asset-backed, mortgage-backed, and mortgage-related securities. In general, bonds purchased by the Fund will have a maturity of 90 days or more at the time of their issuance. In addition, the Fund invests predominantly in U.S. dollar-denominated bonds, although these bonds may be issued by a foreign corporation or a U.S. affiliate of a foreign corporation, or a foreign government or its agencies and instrumentalities. The Fund may also invest up to 10% of its assets in non-U.S. dollar-denominated bonds.

The Fund's dollar-weighted average maturity will normally range between 4 and 12 years, and may either be longer or shorter under certain market conditions, such as during periods of market stress, where there is significant change to market structure, or where prepayment of certain securities held by the fund
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(such as asset-backed, mortgage-backed or similar securities) varies from what is expected under normal market conditions.

The Fund can purchase bonds of any quality. High-quality fixed income securities are those rated the equivalent of A3 or better by Moody's Investors Service, Inc. (Moody's), or another independent rating agency or, if unrated, are determined to be of comparable quality by the Fund's advisor; medium-quality fixed income securities are those rated the equivalent of Baa1, Baa2, or Baa3 by Moody's or another independent rating agency or, if unrated, are determined to be of comparable quality by the Fund's advisor. Both high-quality and medium-quality fixed income securities are considered to be “investment-grade.” Lower-range credit-quality ratings—commonly known as “junk bonds”—are those rated the equivalent of Ba1 or lower by Moody's or another independent rating agency or, if unrated, are determined to be of comparable quality by the Fund's advisor. No more than 5% of the Fund's assets may be invested in non-investment-grade fixed income securities, or junk bonds.

In addition to bonds, the Fund may invest in derivatives such as foreign currency exchange forward contracts, options, futures contracts, other swap agreements, or in to be announced (“TBA”) mortgage-backed securities.
Principal Risks
An investment in the Fund could lose money over short or long periods of time. You should expect the Fund's share price and total return to fluctuate within a wide range. The Fund is subject to the following risks, which could affect the Fund's performance, and the level of risk may vary based on market conditions:
• Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates.
• Income risk, which is the chance that the Fund’s income will decline because of falling interest rates. Income risk is generally high for short-term bond funds and moderate for intermediate-term bond funds, so investors should expect the Fund’s monthly income to fluctuate accordingly.
• Call risk, which is the chance that during periods of falling interest rates, issuers of callable bonds may call (redeem) securities with higher coupon rates or interest rates before their maturity dates. The Fund would then lose any price appreciation above the bond’s call price and would be forced to reinvest the unanticipated proceeds at lower interest rates, resulting in a decline in the Fund’s income. Such redemptions and subsequent reinvestments would also increase the Fund's portfolio turnover rate.
• Prepayment risk, which is the chance that during periods of falling interest rates, homeowners will refinance their mortgages before their maturity dates,
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resulting in prepayment of mortgage-backed securities held by the Fund. The Fund would then lose any price appreciation above the mortgage’s principal and would be forced to reinvest the unanticipated proceeds at lower interest rates, resulting in a decline in the Fund’s income. Such prepayments and subsequent reinvestments would also increase the Fund’s portfolio turnover rate.
• Extension risk, which is the chance that during periods of rising interest rates, certain debt securities will be paid off substantially more slowly than originally anticipated, and the value of those securities may fall. For funds that invest in mortgage-backed securities, extension risk is the chance that during periods of rising interest rates, homeowners will repay their mortgages at slower rates.
• Credit risk, which is the chance that a bond issuer will fail to pay interest or principal in a timely manner or that negative perceptions of the issuer’s ability to make such payments will cause the price of that bond to decline.
• Liquidity risk, which is the chance that the Fund may not be able to sell a security in a timely manner at a desired price.
• Currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates.
• Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.
• Management of certain similar funds risk. The name, investment objective, principal investment strategies, and risks of the Fund are similar to another separate fund managed by the Fund’s portfolio managers. However, the investment results of the Fund may be higher or lower than, and there is no guarantee that the investment results of the Fund will be comparable to, that other fund.
• Derivatives risk. The Fund may invest in derivatives, which may involve risks different from, and possibly greater than, those of investments directly in the underlying securities or assets.
• Counterparty risk, which is the chance that the counterparty to a derivatives contract, or other investment vehicle, with the Fund is unable or unwilling to meet its financial obligations.
An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
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Annual Total Returns
The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Investor Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the share classes presented compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Annual Total Returns — Vanguard Core Bond Fund Investor Shares
During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:
 
Total Return
Quarter
Highest
6.82
%
December 31, 2023
Lowest
-5.97
%
March 31, 2022
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Average Annual Total Returns for Periods Ended December 31, 2023
 
1 Year
5 Years
Since
Fund
Inception
Fund
Inception
Date
Vanguard Core Bond Fund
Investor Shares
03/28/2016
Return Before Taxes
5.90
%
1.76
%
1.53
%
Return After Taxes on Distributions
4.16
0.62
0.39
Return After Taxes on Distributions and Sale
of Fund Shares
3.45
0.88
0.69
Vanguard Core Bond Fund Admiral Shares
03/28/2016
Return Before Taxes
5.95
%
1.88
%
1.64
%
Bloomberg U.S. Aggregate Float Adjusted
Index
(reflects no deduction for fees, expenses,
or taxes)
5.60
%
1.17
%
1.23
%
Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are shown only for the Investor Shares and may differ for each share class. After-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Investment Advisor
The Vanguard Group, Inc. (Vanguard)
Portfolio Managers
Brian W. Quigley, CFA, Portfolio Manager at Vanguard. He has co-managed the Fund since its inception in 2016.
Arvind Narayanan, CFA, Senior Portfolio Manager and Principal of Vanguard. He has co-managed the Fund since 2019.
Daniel Shaykevich, Senior Portfolio Manager and Principal of Vanguard. He has co-managed the Fund since 2018.
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Purchase and Sale of Fund Shares
You may purchase or redeem shares online through our website (vanguard.com), by mail (The Vanguard Group, P.O. Box 982901, El Paso, TX 79998-2901), or by telephone (800-662-2739). The minimum investment amount required to open and maintain a Fund account for Investor Shares or Admiral Shares is $3,000 or $50,000, respectively. The minimum investment amount required to add to an existing Fund account is generally $1. Financial intermediaries, institutional clients, and Vanguard-advised clients should contact Vanguard for information on special eligibility rules that may apply to them regarding Admiral Shares. If you are investing through an intermediary, please contact that firm directly for more information regarding your eligibility. If you are investing through an employer-sponsored retirement or savings plan, your plan administrator or your benefits office can provide you with detailed information on how you can invest through your plan.
Tax Information
The Fund’s distributions may be taxable as ordinary income or capital gain. If you are investing through a tax-advantaged account, such as an IRA or an employer-sponsored retirement or savings plan, special tax rules apply.
Payments to Financial Intermediaries
The Fund and its investment advisor do not pay financial intermediaries for sales of Fund shares.
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More on the Fund
This prospectus describes the principal risks you would face as a Fund shareholder. It is important to keep in mind one of the main principles of investing: generally, the higher the risk of losing money, the higher the potential reward. The reverse, also, is generally true: the lower the risk, the lower the potential reward. As you consider an investment in any mutual fund, you should take into account your personal tolerance for fluctuations in the securities markets. Look for this  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
Share Class Overview
A Similar but Distinct Vanguard Fund
The Fund offered by this prospectus should not be confused with Vanguard Core Bond ETF, a separate Vanguard fund that shares an investment objective, and similar principal investment strategies and risks. Differences in scale, certain investment processes, and underlying holdings are expected to produce different investment returns by the funds. To obtain a prospectus for Vanguard Core Bond ETF, please call 800-662-7447.
The Fund offers two separate classes of shares: Investor Shares and Admiral Shares.
Both share classes offered by the Fund have the same investment objective, strategies, and policies. However, because different share classes can have different expenses, their investment returns may differ.
Plain Talk About Fund Expenses
All mutual funds have operating expenses. These expenses, which are
deducted from a fund’s gross income, are expressed as a percentage of the
net assets of the fund. Assuming that operating expenses remain as stated in
the Fees and Expenses section, Vanguard Core Bond Fund’s expense ratios
would be as follows: for Investor Shares, 0.20%, or $2.00 per $1,000 of
average net assets; for Admiral Shares, 0.10%, or $1.00 per $1,000 of
average net assets. The average expense ratio for core bond funds in 2022
was 0.66%, or $6.60 per $1,000 of average net assets (derived from data
provided by Lipper, a Thomson Reuters Company, which reports on the
mutual fund industry).
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Plain Talk About Costs of Investing
Costs are an important consideration in choosing a mutual fund. That is
because you, as a shareholder, pay a proportionate share of the costs of
operating a fund and any transaction costs incurred when the fund buys or
sells securities, including costs generated by shareholders of other share
classes offered by the fund. These costs can erode a substantial portion of
the gross income or the capital appreciation a fund achieves. Even
seemingly small differences in expenses can, over time, have a dramatic
effect on a fund’s performance.
The following sections explain the principal investment strategies and policies that the Fund uses in pursuit of its investment objective. The Fund's board of trustees, which oversees the Fund's management, may change investment strategies or policies in the interest of shareholders without a shareholder vote, unless those strategies or policies are designated as fundamental. Note that the Fund’s investment objective is not fundamental and may be changed without a shareholder vote. The Fund may change its 80% policy only upon 60 days‘ notice to shareholders.
Market Exposure
The Fund is subject to interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates.
Although fixed income securities (commonly referred to as bonds) are often thought to be less risky than stocks, there have been periods when bond prices have fallen significantly because of rising interest rates. For instance, prices of long-term bonds fell by almost 48% between December 1976 and September 1981.
To illustrate the relationship between bond prices and interest rates, the following table shows the effect of a 1% and a 2% change (both up and down) in interest rates on the values of three noncallable bonds (i.e., bonds that cannot be redeemed by the issuer) of different maturities, each with a face value of $1,000.
9

How Interest Rate Changes Affect the Value of a $1,000 Bond1
Type of Bond (Maturity)
After a 1%
Increase
After a 1%
Decrease
After a 2%
Increase
After a 2%
Decrease
Short-Term (2.5 years)
$977
$1,024
$954
$1,049
Intermediate-Term (10 years)
922
1,086
851
1,180
Long-Term (20 years)
874
1,150
769
1,328
1 Assuming a 4% coupon rate.
These figures are for illustration only; you should not regard them as an indication of future performance of the bond market as a whole or the Fund in particular.
Plain Talk About Bonds and Interest Rates
As a rule, when interest rates rise, bond prices fall. The opposite is also true:
bond prices go up when interest rates fall. Why do bond prices and interest
rates move in opposite directions? Let’s assume that you hold a bond
offering a 4% yield. A year later, interest rates are on the rise and bonds of
comparable quality and maturity are offered with a 5% yield. With
higher-yielding bonds available, you would have trouble selling your 4% bond
for the price you paid—you would probably have to lower your asking price.
On the other hand, if interest rates were falling and 3% bonds were being
offered, you should be able to sell your 4% bond for more than you paid.
How mortgage-backed securities are different: In general, declining interest
rates will not lift the prices of mortgage-backed securities—such as those
guaranteed by the Government National Mortgage Association—as much as
the prices of comparable bonds. Why? Because when interest rates fall, the
bond market tends to discount the prices of mortgage-backed securities for
prepayment risk—the possibility that homeowners will refinance their
mortgages at lower rates and cause the bonds to be paid off prior to maturity.
In part to compensate for this prepayment possibility, mortgage-backed
securities tend to offer higher yields than other bonds of comparable credit
quality and maturity. In contrast, when interest rates rise, prepayments tend
to slow down, subjecting mortgage-backed securities to extension risk—the
possibility that homeowners will repay their mortgages at slower rates. This
will lengthen the duration or average life of mortgage-backed securities held
by a fund and delay the fund’s ability to reinvest proceeds at higher interest
rates, making the fund more sensitive to changes in interest rates.
Changes in interest rates can affect bond income as well as bond prices.
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The Fund is subject to income risk, which is the chance that the Fund's income will decline because of falling interest rates. A fund's income declines when interest rates fall because the fund then must invest new cash flow and cash from maturing bonds in lower-yielding bonds. Income risk is generally high for short-term bond funds and moderate for intermediate-term bond funds, so investors should expect the Fund's monthly income to fluctuate accordingly.
Plain Talk About Bond Maturities
A bond is issued with a specific maturity date—the date when the issuer must
pay back the bond’s principal (face value). Bond maturities range from less
than 1 year to more than 30 years. Typically, the longer a bond’s maturity, the
more price risk you, as a bond investor, will face as interest rates rise—but
also the higher the potential yield you could receive. Longer-term bonds are
generally more suitable for investors willing to take a greater risk of price
fluctuations to get higher and more stable interest income. Shorter-term bond
investors should be willing to accept lower yields and greater income
variability in return for less fluctuation in the value of their investment. The
stated maturity of a bond may differ from the effective maturity of a bond,
which takes into consideration that an action such as a call or refunding may
cause bonds to be repaid before their stated maturity dates.
Although falling interest rates tend to strengthen bond prices, they can cause other problems for bond fund investors—bond calls and prepayments.
Plain Talk About Callable Bonds
Although bonds are issued with clearly defined maturities, in some cases the
bond issuer has a right to call in (redeem) the bond earlier than its maturity
date. When a bond is called, the bondholder may have to replace it with
another bond with a lower yield than the original bond. One way for bond
investors to protect themselves against call risk is to purchase a bond early
in its lifetime, long before its call date. Another way is to buy bonds with lower
coupon rates or interest rates, which make them less likely to be called.
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The Fund is subject to call risk, which is the chance that during periods of falling interest rates, issuers of callable bonds may call (redeem) securities with higher coupon rates or interest rates before their maturity dates. The Fund would then lose any price appreciation above the bond's call price and would be forced to reinvest the unanticipated proceeds at lower interest rates, resulting in a decline in the Fund's income. Such redemptions and subsequent reinvestments would also increase the Fund's portfolio turnover rate.
The Fund is subject to prepayment risk, which is the chance that during periods of falling interest rates, homeowners will refinance their mortgages before their maturity dates, resulting in prepayment of mortgage-backed securities held by the Fund. The Fund would then lose any price appreciation above the mortgage's principal and would be forced to reinvest the unanticipated proceeds at lower interest rates, resulting in a decline in the Fund's income. Such prepayments and subsequent reinvestments would also increase the Fund's portfolio turnover rate.
The Fund is subject to extension risk, which is the chance that during periods of rising interest rates, certain debt securities will be paid off substantially more slowly than originally anticipated, and the value of those securities may fall. For funds that invest in mortgage-backed securities, extension risk is the chance that during periods of rising interest rates, homeowners will repay their mortgages at slower rates. This will lengthen the duration or average life of mortgage-backed securities held by the Fund and delay the Fund‘s ability to reinvest proceeds at higher interest rates.
The Fund is subject to credit risk, which is the chance that a bond issuer will fail to pay interest or principal in a timely manner or that negative perceptions of the issuer's ability to make such payments will cause the price of that bond to decline.
Plain Talk About Credit Quality
A bond’s credit quality rating is an assessment of the issuer’s ability to pay
interest on the bond and, ultimately, to repay the principal. The lower the
credit quality, the greater the perceived chance that the bond issuer will
default, or fail to meet its payment obligations. All things being equal, the
lower a bond’s credit quality, the higher its yield should be to compensate
investors for assuming additional risk.
The Fund is expected to have credit quality that is either high or upper-medium.
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Credit Ratings of the Fund’s Investments
(Percentage of Fund Assets Under Normal Circumstances)
Vanguard Fund
Issued or Backed
by U.S. Gov’t. or
its Agencies and
Instrumentalities
High or
Highest
Quality
(Non-Gov’t.)
Upper-
Medium
Quality
Medium
Quality
Non-
Investment-
Grade
Core Bond Fund
——————————At least 95%——————————
No more
than 5%
The Fund may invest no more than 5% of its assets in non-investment-grade fixed income securities. Non-investment-grade fixed income securities are those rated the equivalent of Moody’s Ba1 or below or, if unrated, are determined to be of comparable quality by the Fund’s advisor.
The Fund is subject to liquidity risk, which is the chance that the Fund may not be able to sell a security in a timely manner at a desired price.
There may be little trading in the secondary market for particular bonds, loans, and other debt securities, which may make them more difficult to value or sell.
To a limited extent, the Fund is subject to event risk, which is the chance that corporate fixed income securities held by the Fund may suffer a substantial decline in credit quality and market value because of a restructuring of the companies that issued the securities or because of other factors negatively affecting the issuers.
The Fund is subject to currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates.
The Fund may invest no more than 10% of its assets in non-U.S. dollar denominated bonds. These bonds include sovereign debt securities, which include fixed income securities that are issued or guaranteed by foreign sovereign governments or their agencies, authorities, political subdivisions or instrumentalities, or other supranational agencies, as well as debt securities issued or guaranteed by foreign corporations and foreign financial institutions. Currency risk can affect the credit risk of the Fund’s bonds because the issuer would have a large burden if its local currency weakens significantly compared with the U.S. dollar. If an issuer’s local currency declines relative to the U.S. dollar, it could negatively affect perceptions of the issuer’s ability to make
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payments, which could cause the issuer’s bonds to decline in value. Many issuers manage this risk by hedging currency exposure, and their effectiveness in doing so is reflected in their credit rating.
Plain Talk About Types of Bonds
Bonds are issued (sold) by many sources: Corporations issue corporate
bonds; the federal government issues U.S. Treasury bonds; agencies of the
federal government issue agency bonds; financial institutions issue
asset-backed bonds; and mortgage holders issue “mortgage-backed”
pass-through certificates. Each issuer is responsible for paying back the
bond’s initial value as well as for making periodic interest payments. Many
bonds issued by government agencies and entities are neither guaranteed
nor insured by the U.S. government.
Market disruptions can adversely affect local and global markets as well as normal market conditions and operations. Any such disruptions could have an adverse impact on the value of the Fund's investments and Fund performance.
Security Selection
Vanguard’s actively managed fixed income funds follow a portfolio manager-driven process that uses both top-down and bottom-up inputs. Portfolio managers are responsible for portfolio construction and strategy, leveraging the top-down insights of Vanguard's senior investment leaders and Vanguard's Investment Strategy Group, the bottom-up insights of the sector teams, and the relative value views across fixed income sectors. Risk optimization measures are present throughout the investment process, and the Senior Investment Committee provides governance and oversight for the entire lineup. Securities are sold based on the advisor's judgments about a security’s fundamentals, technical factors, valuation, and contribution to the overall portfolio.
The types of financial instruments that may be purchased by the Fund are identified and explained as follows:
• U.S. government and agency bonds represent loans by investors to the U.S. Treasury or a wide variety of government agencies and instrumentalities. Securities issued by most U.S. government entities are neither guaranteed by the U.S. Treasury nor backed by the full faith and credit of the U.S. government. These entities include, among others, the Federal Home Loan Banks (FHLBs), the Federal National Mortgage Association (FNMA), and the Federal Home Loan Mortgage Corporation (FHLMC). Securities issued by the U.S. Treasury and a small number of U.S. government agencies, such as the Government National
14

Mortgage Association (GNMA), are backed by the full faith and credit of the U.S. government. The market values of U.S. government and agency securities and U.S. Treasury securities are subject to fluctuation.
• Corporate bonds are debt securities issued by businesses that want to borrow money for some purpose—often to develop a new product or service, to expand into a new market, or to buy another company. As with other types of bonds, the issuer promises to repay the principal on a specific date and to make interest payments in the meantime. The amount of interest offered depends both on market conditions and on the financial health of the corporation issuing the bonds; a company whose credit rating is not strong will have to offer a higher interest rate to obtain buyers for its bonds.
• Municipal bonds represent loans by an investor to state or local governments or to other governmental authorities.
• Mortgage-backed securities represent partial ownership interest in pools of commercial or residential mortgage loans made by financial institutions to finance a borrower’s real estate purchase. These loans are packaged by private or governmental issuers for sale to investors. As the underlying mortgage loans are paid by borrowers, the investors receive payments of interest and principal. To be announced (TBA) securities represent an agreement to buy or sell mortgage-backed securities with agreed-upon characteristics for a fixed unit price, with settlement on a scheduled future date beyond the typical settlement period for most other securities.
The Fund may also invest in mortgage-backed securities that are packaged by private corporations and are not guaranteed by the U.S. government.
The Fund may enter into mortgage-dollar-roll transactions. In a mortgage-dollar-roll transaction, a fund sells mortgage-backed securities to a dealer and simultaneously agrees to purchase similar securities in the future at a predetermined price. These transactions simulate an investment in mortgage-backed securities and have the potential to enhance a fund’s returns and reduce its administrative burdens, compared with holding mortgage-backed securities directly. These transactions may increase the fund’s portfolio turnover rate. Mortgage dollar rolls will be used only to the extent that they are consistent with the Fund’s investment objective and risk profile.
• Cash equivalent investments is a blanket term that describes a variety of short-term fixed income investments, including money market instruments, commercial paper, bank certificates of deposit, banker’s acceptances, and repurchase agreements. Repurchase agreements represent short-term (normally overnight) loans by a fund to banks or large securities dealers. Repurchase agreements can carry several risks. For instance, if the seller is unable to
15

repurchase the securities as promised, a fund may experience a loss when trying to sell the securities to another buyer. Also, if the seller becomes insolvent, a bankruptcy court may determine that the securities do not belong to a fund and order that the securities be used to pay off the seller’s debts. The Fund’s advisor believes that these risks can be controlled through careful security selection and monitoring.
• Futures, options, and other derivatives are described in detail under Other Investment Policies and Risks.
• Asset-backed securities are bonds that represent partial ownership in pools of consumer or commercial loans—most often credit card, automobile, or trade receivables. Asset-backed securities, which can be types of corporate fixed income obligations, are issued by entities formed solely for that purpose, but their value ultimately depends on repayments by underlying borrowers. A primary risk of asset-backed securities is that their maturity is difficult to predict, being driven by borrowers’ prepayments.
• International dollar-denominated bonds are bonds denominated in U.S. dollars and issued by foreign governments and companies. To the extent that the Fund owns foreign bonds, it is subject to country risk, which is the chance that world events—such as political upheaval, financial troubles, or natural disasters—will adversely affect the value and/or liquidity of securities issued by companies in foreign countries. In addition, the prices of foreign bonds and the prices of U.S. bonds have, at times, moved in opposite directions. Because the bond’s value is designated in dollars rather than in the currency of the issuer’s country, the investor is not exposed to currency risk; rather, the issuer assumes that risk, usually to attract U.S. investors. Although currency movements do not affect the value of international dollar-denominated bonds directly, they could affect the value indirectly by adversely affecting the issuer’s ability (or the market’s perception of the issuer’s ability) to pay interest or repay principal.
• Foreign currency bonds are bonds denominated in the local currency of a non-U.S. country and issued by foreign governments, government agencies, and companies. The fund will seek to have a majority of its assets either denominated in or hedged back to the U.S. dollar, but will also have the ability to invest in bonds denominated in a local currency on an unhedged basis. To the extent that a fund’s investments in foreign currency bonds are hedged, the fund is subject to currency hedging risk. Currency hedging risk is the chance that the currency hedging transactions entered into by the fund may not perfectly offset the fund’s foreign currency exposure.
• Preferred stocks distribute set dividends from the issuer. The preferred-stock holder’s claim on the issuer’s income and assets ranks before that of common-stock holders, but after that of bondholders.
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• Convertible securities are bonds or preferred stocks that are convertible into, or exchangeable for, common stocks.
• Collateralized mortgage obligations (CMOs) are special bonds that are collateralized by mortgages or mortgage pass-through securities. Cash flow rights on underlying mortgages—the rights to receive principal and interest payments—are divided up and prioritized to create short-, intermediate-, and long-term bonds. CMOs rely on assumptions about the timing of cash flows on the underlying mortgages, including expected prepayment rates. The primary risk of a CMO is that these assumptions are wrong, which would either shorten or lengthen the bond’s maturity. The Fund will invest only in CMOs that are believed to be consistent with its maturity and credit-quality standards.
The Fund is subject to manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.
The Fund is subject to management of certain similar funds risk. The name, investment objective, principal investment strategies, and risks of the Fund are similar to another separate fund managed by the Fund’s portfolio managers. However, the investment results of the Fund may be higher or lower than, and there is no guarantee that the investment results of the Fund will be comparable to, that other fund due to differences in scale, certain investment processes, and underlying holdings.
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Plain Talk About U.S. Government-Sponsored Enterprises
A variety of U.S. government-sponsored enterprises (GSEs), such as the
Federal Home Loan Mortgage Corporation (FHLMC), the Federal National
Mortgage Association (FNMA), and the Federal Home Loan Banks (FHLBs),
issue debt and mortgage-backed securities. Although GSEs may be chartered
or sponsored by acts of Congress, they are not funded by congressional
appropriations. In September of 2008, the U.S. Treasury placed FNMA and
FHLMC under conservatorship and appointed the Federal Housing Finance
Agency (FHFA) to manage their daily operations. In addition, the U.S. Treasury
entered into purchase agreements with FNMA and FHLMC to provide them
with capital in exchange for senior preferred stock. Generally, a GSE’s
securities are neither issued nor guaranteed by the U.S. Treasury and are not
backed by the full faith and credit of the U.S. government. In most cases, these
securities are supported only by the credit of the GSE, standing alone. In some
cases, a GSE’s securities may be supported by the ability of the GSE to
borrow from the U.S. Treasury or may be supported by the U.S. government in
some other way. Securities issued by the Government National Mortgage
Association (GNMA), however, are backed by the full faith and credit of the
U.S. government.
Other Investment Policies and Risks
In addition to investing in bonds, the Fund may make other kinds of investments to achieve its investment objective.
The Fund may purchase nonpublic securities, generally referred to as 144A securities. The Fund may invest up to 15% of its net assets in illiquid securities. Illiquid securities are investments that the Fund reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment. Restricted securities are a special type of illiquid security; these securities have not been publicly issued and legally can be resold only to qualified buyers. From time to time, the board of trustees may determine that particular restricted securities are not illiquid, and those securities may then be purchased by the Fund without limit.
The Fund may invest in derivatives. In general, investments in derivatives may involve risks different from, and possibly greater than, those of investments directly in the underlying securities or assets.
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Generally speaking, a derivative is a financial contract whose value is based on the value of a financial asset (such as a stock, a bond, or a currency), a physical asset (such as gold, oil, or wheat), a market index, or a reference rate. The Fund may invest in derivatives only if the expected risks and rewards of the derivatives are consistent with the investment objective, policies, strategies, and risks of the Fund as disclosed in this prospectus. In particular, derivatives will be used only when they may help the advisor to accomplish one or more of the following:
• Invest in eligible asset classes with greater efficiency and lower cost than is possible through direct investment.
• Add value when these instruments are attractively priced.
• Adjust sensitivity to changes in interest rates.
• Adjust the overall credit risk of the portfolio or actively overweight or underweight credit risk to specific bond issuers.
• Hedge foreign currency exposure.
• Hedge foreign interest rate exposure.
The Fund's derivative investments may include fixed income futures contracts; fixed income options, including options on swaps; currency swaps; foreign currency exchange forwards; interest rate swaps; total return swaps; credit default swaps; or other derivatives. Losses (or gains) involving futures contracts can sometimes be substantial—in part because a relatively small price movement in a futures contract may result in an immediate and substantial loss (or gain) for a fund. Similar risks exist for other types of derivatives. The Fund may also invest in U.S. Treasury futures for either cash management purposes or potentially to add value since they may be favorably priced.

The Fund may enter into a currency swap or foreign currency exchange forward to sell or buy an amount of foreign currency with which it does not have exposure.
The Fund may invest a small portion of its assets in shares of exchange-traded funds (ETFs). These ETFs typically provide returns similar to those of bonds. The Fund may purchase ETFs when doing so will reduce the Fund’s transaction costs, facilitate cash management, mitigate risk, or have the potential to add value because the instruments are favorably priced. Vanguard receives no additional revenue from Fund assets invested in ETF Shares of other Vanguard funds. Fund assets invested in ETF Shares of other Vanguard funds are excluded when allocating to the Fund its share of the costs of Vanguard’s operations.
19

Plain Talk About Derivatives
Derivatives can take many forms. Some forms of derivatives—such as
exchange-traded futures and options on securities, commodities, or
indexes—have been trading on regulated exchanges for decades. These
types of derivatives are standardized contracts that can easily be bought and
sold and whose market values are determined and published daily. On the
other hand, non-exchange-traded derivatives—such as certain swap
agreements—tend to be more specialized or complex and may be more
difficult to accurately value.
The Fund is subject to counterparty risk, which is the chance that the counterparty to a derivatives contract, or other investment vehicle, with the Fund is unable or unwilling to meet its financial obligations.
Cash Management
The Fund's daily cash balance may be invested in Vanguard Market Liquidity Fund and/or Vanguard Municipal Cash Management Fund (each, a CMT Fund), which are low-cost money market funds. When investing in a CMT Fund, the Fund bears its proportionate share of the expenses of the CMT Fund in which it invests. Vanguard receives no additional revenue from Fund assets invested in a CMT Fund.
Redemption Requests
Methods used to meet redemption requests. Under normal circumstances, the Fund typically expects to meet redemptions with positive cash flows. When this is not an option, the Fund seeks to maintain its risk exposure by selling a cross section of the Fund’s holdings to meet redemptions, while also factoring in transaction costs. Additionally, the Fund may work with larger clients to implement their redemptions in a manner that is least disruptive to the portfolio; see “Potentially disruptive redemptions” under Redeeming Shares in the Investing With Vanguard section.
Under certain circumstances, including under stressed market conditions, there are additional tools that the Fund may use in order to meet redemptions, including advancing the settlement of market trades with counterparties to match investor redemption payments or delaying settlement of an investor’s transaction to match trade settlement within regulatory requirements. The Fund may also suspend payment of redemption proceeds for up to seven days; see “Emergency circumstances” under Redeeming Shares in the Investing With Vanguard section. Additionally under these unusual circumstances, the Fund may borrow
20

money (subject to certain regulatory conditions and if available under board-approved procedures) through an interfund lending facility; through a bank line-of-credit, including a joint committed credit facility; or through an uncommitted line-of-credit from Vanguard in order to meet redemption requests.
Potential redemption activity impacts. At times, the Fund may experience adverse effects when certain large shareholders, or multiple shareholders comprising significant ownership of the Fund or a share class of the Fund, redeem large amounts of shares of the Fund. Large redemptions may cause the Fund to sell portfolio securities at times when it would not otherwise do so. This may result in the Fund distributing capital gains or other taxable income to non-redeeming shareholders. Large redemptions may also increase the Fund's transaction costs. Redemption activity can occur for many reasons, including shareholder reactions to market movements or other events unrelated to Vanguard’s actions, or when Vanguard makes product changes that, for example, may result in a shareholder redeeming shares of the Fund to purchase shares of another similar fund or investment vehicle. When experiencing large redemptions, the Fund reserves the right to pay all or part of the redemption in-kind and/or delay payment of the redemption proceeds for up to seven calendar days; see “Potentially disruptive redemptions” under Redeeming Shares in the Investing With Vanguard section.
Temporary Investment Measures
The Fund may temporarily depart from its normal investment policies and strategies when the advisor believes that doing so is in the Fund's best interest, so long as the strategy or policy employed is consistent with the Fund's investment objective. For instance, the Fund may invest beyond its normal limits in derivatives or exchange-traded funds that are consistent with the Fund's investment objective when those instruments are more favorably priced or provide needed liquidity, as might be the case when the Fund receives large cash flows that it cannot prudently invest immediately.
In addition, the Fund may take temporary defensive positions that are inconsistent with its normal investment policies and strategies—for instance, by allocating substantial assets to cash equivalent investments or other less volatile instruments— in response to adverse or unusual market, economic, political, or other conditions. In doing so, the Fund may succeed in avoiding losses but may otherwise fail to achieve its investment objective.
Frequent Trading or Market-Timing
Background. Some investors try to profit from strategies involving frequent trading of mutual fund shares, such as market-timing. For funds holding foreign securities, investors may try to take advantage of an anticipated difference
21

between the price of the fund’s shares and price movements in overseas markets, a practice also known as time-zone arbitrage. Investors also may try to engage in frequent trading of funds holding investments such as small-cap stocks and high-yield bonds. As money is shifted into and out of a fund by a shareholder engaging in frequent trading, the fund incurs costs for buying and selling securities, resulting in increased brokerage and administrative costs. These costs are borne by all fund shareholders, including the long-term investors who do not generate the costs. In addition, frequent trading may interfere with an advisor’s ability to efficiently manage the fund.
Policies to address frequent trading. The Vanguard funds (other than money market funds and short-term bond funds, but including Vanguard Short-Term Inflation-Protected Securities Index Fund) do not knowingly accommodate frequent trading. The board of trustees of each Vanguard fund (other than money market funds and short-term bond funds, but including Vanguard Short-Term Inflation-Protected Securities Index Fund) has adopted policies and procedures reasonably designed to detect and discourage frequent trading and, in some cases, to compensate the fund for the costs associated with it. These policies and procedures do not apply to ETF Shares because frequent trading in ETF Shares generally does not disrupt portfolio management or otherwise harm fund shareholders. Although there is no assurance that Vanguard will be able to detect or prevent frequent trading or market-timing in all circumstances, the following policies have been adopted to address these issues:
• Each Vanguard fund reserves the right to reject any purchase request—including exchanges from other Vanguard funds—without notice and regardless of size. For example, a purchase request could be rejected because the investor has a history of frequent trading or if Vanguard determines that such purchase may negatively affect a fund’s operation or performance.
• Each Vanguard fund (other than money market funds and short-term bond funds, but including Vanguard Short-Term Inflation-Protected Securities Index Fund) generally prohibits, except as otherwise noted in the Investing With Vanguard section, an investor’s purchases or exchanges into a fund account for 30 calendar days after the investor has redeemed or exchanged out of that fund account.
• Certain Vanguard funds charge shareholders purchase and/or redemption fees on transactions.
See the Investing With Vanguard section of this prospectus for further details on Vanguard’s transaction policies.
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Each Vanguard fund (other than retail and government money market funds), in determining its net asset value, will use fair-value pricing when appropriate, as described in the Share Price section. Fair-value pricing may reduce or eliminate the profitability of certain frequent-trading strategies.
Do not invest with Vanguard if you are a market-timer.
A precautionary note to investment companies: The Fund's shares are issued by a registered investment company, and therefore the acquisition of such shares by other investment companies and private funds is subject to the restrictions of Section 12(d)(1) of the Investment Company Act of 1940 (the 1940 Act). SEC Rule 12d1-4 under the 1940 Act permits registered investment companies to invest in other registered investment companies beyond the limits in Section 12(d)(1), subject to certain conditions, including that funds with different investment advisors must enter into a fund of funds investment agreement.
Turnover Rate
Although the Fund generally seeks to invest for the long term, it may sell securities regardless of how long they have been held. The Financial Highlights section of this prospectus shows historical turnover rates for the Fund. A turnover rate of 100%, for example, would mean that the Fund had sold and replaced securities valued at 100% of its net assets within a one-year period. Shorter-term bonds will mature or be sold—and need to be replaced—more frequently than longer-term bonds. As a result, shorter-term bond funds tend to have higher turnover rates than longer-term bond funds. In general, the greater the turnover rate, the greater the impact transaction costs will have on a fund’s return. Also, funds with high turnover rates may be more likely to generate capital gains, including short-term capital gains, that must be distributed to shareholders and will be taxable to shareholders investing through a taxable account.
The Fund and Vanguard
The Fund is a member of The Vanguard Group, Inc. (Vanguard), a family of over 200 funds. All of the funds that are members of Vanguard (other than funds of funds) share in the expenses associated with administrative services and business operations, such as personnel, office space, and equipment.
23

Vanguard Marketing Corporation provides marketing services to the funds. Although fund shareholders do not pay sales commissions or 12b-1 distribution fees, each fund (other than a fund of funds) or each share class of a fund (in the case of a fund with multiple share classes) pays its allocated share of the Vanguard funds’ marketing costs.
Plain Talk About Vanguard’s Unique Corporate Structure
Vanguard is owned jointly by the funds it oversees and thus indirectly by the
shareholders in those funds. Most other mutual funds are operated by
management companies that are owned by third parties—either public or
private stockholders—and not by the funds they serve.
Investment Advisor
The Vanguard Group, Inc., P.O. Box 2600, Valley Forge, PA 19482, which began operations in 1975, serves as advisor to the Fund through its Fixed Income Group. As of September 30, 2023, Vanguard served as advisor for approximately $6.5 trillion in assets. Vanguard provides investment advisory services to the Fund pursuant to the Funds’ Service Agreement and subject to the supervision and oversight of the trustees and officers of the Fund.
For the fiscal year ended September 30, 2023, the advisory expenses represented an effective annual rate of 0.01% of the Fund’s average net assets.
Although the Fund is managed solely by Vanguard, the Fund reserves the right to utilize a multimanager approach in the future. Under the terms of an SEC exemption, the Fund's board of trustees may, without prior approval from shareholders, change the terms of an advisory agreement with a third-party investment advisor or hire a new third-party investment advisor—either as a replacement for an existing advisor or as an additional advisor. Any significant change in the Fund’s advisory arrangements will be communicated to shareholders in writing. As the Fund's sponsor and overall manager, Vanguard may provide investment advisory services to the Fund at any time. Vanguard may also recommend to the board of trustees that an advisor be hired, terminated, or replaced or that the terms of an existing advisory agreement be revised. The Fund has filed an application seeking a similar SEC exemption with respect to investment advisors that are wholly owned subsidiaries of Vanguard. If the exemption is granted, the Fund may rely on the new SEC relief.
24

For a discussion of why the board of trustees approved the Fund's investment advisory arrangement, see the most recent semiannual report to shareholders covering the fiscal period ended March 31.
The managers primarily responsible for the day-to-day management of the Fund are:
Brian W. Quigley, CFA, Portfolio Manager at Vanguard. He has been with Vanguard since 2003, has worked in investment management since 2005, has managed investment portfolios since 2015, and has co-managed the Fund since its inception in 2016. Education: B.S., Lehigh University.
Arvind Narayanan, CFA, Senior Portfolio Manager and Principal of Vanguard. He has been with Vanguard since 2019, has worked in investment management since 2002, has managed investment portfolios since 2006, and has co-managed the Fund since 2019. Education: B.A., Goucher College; M.B.A., New York University.
Daniel Shaykevich, Senior Portfolio Manager and Principal of Vanguard. He has worked in investment management since 2001, has managed investment portfolios since 2004, has been with Vanguard since 2013, and has co-managed the Fund since 2018. Education: B.S., Carnegie Mellon University.
The Fund's Statement of Additional Information provides information about each portfolio manager’s compensation, other accounts under management, and ownership of shares of the Fund.
Dividends, Capital Gains, and Taxes
Fund Distributions
The Fund distributes to shareholders virtually all of its net income (interest less expenses) as well as any net short-term or long-term capital gains realized from the sale of its holdings. From time to time, the Fund may also make distributions that are treated as a return of capital. Income dividends generally are declared monthly and distributed monthly. Capital gains distributions, if any, generally occur annually in December. In addition, the Fund may occasionally make a supplemental distribution at some other time during the year.
25

You can receive distributions of income or capital gains in cash, or you can have them automatically reinvested in more shares of the Fund. However, if you are investing through an employer-sponsored retirement or savings plan, your distributions will be automatically reinvested in additional Fund shares.
Plain Talk About Distributions
As a shareholder, you are entitled to your portion of a fund’s income from
interest as well as capital gains from the fund’s sale of investments. Income
consists of interest the fund earns from its money market and bond
investments. Capital gains are realized whenever the fund sells securities for
higher prices than it paid for them. These capital gains are either short-term
or long-term, depending on whether the fund held the securities for one year
or less or for more than one year.
Basic Tax Points
Investors in taxable accounts should be aware of the following basic federal income tax points:
• Distributions are taxable to you whether or not you reinvest these amounts in additional Fund Shares.
• Distributions declared in December—if paid to you by the end of January—are taxable as if received in December.
• Any income dividend distribution or short-term capital gains distribution that you receive is taxable to you as ordinary income.
• Any distribution of net long-term capital gains is taxable to you as long-term capital gains, no matter how long you have owned shares in the Fund.
• Capital gains distributions may vary considerably from year to year as a result of the Fund's normal investment activities and cash flows.
• Your cost basis in the Fund will be decreased by the amount of any return of capital that you receive. This, in turn, will affect the amount of any capital gain or loss that you realize when selling or exchanging your Fund shares.
• Return of capital distributions generally are not taxable to you until your cost basis has been reduced to zero. If your cost basis is at zero, return of capital distributions will be treated as capital gains.
• A sale or exchange of Fund shares is a taxable event. This means that you may have a capital gain to report as income, or a capital loss to report as a deduction, when you complete your tax return.
26

• Any conversion between classes of shares of the same fund is a nontaxable event. By contrast, an exchange between classes of shares of different funds is a taxable event.
• Vanguard (or your intermediary) will send you a statement each year showing the tax status of all of your distributions.
Individuals, trusts, and estates whose income exceeds certain threshold amounts are subject to a 3.8% Medicare contribution tax on “net investment income.” Net investment income takes into account distributions paid by the Fund and capital gains from any sale or exchange of Fund shares.
Income dividends and capital gains distributions that you receive, as well as your gains or losses from any sale or exchange of Fund shares, may be subject to state and local income taxes. Depending on your state’s rules, however, any dividends attributable to interest earned on direct obligations of the U.S. government may be exempt from state and local taxes. Vanguard will notify you each year how much, if any, of your dividends may qualify for this exemption.
This prospectus provides general tax information only. If you are investing through a tax-advantaged account, such as an IRA or an employer-sponsored retirement or savings plan, special tax rules apply. Please consult your tax advisor for detailed information about any tax consequences for you.
General Information
Backup withholding. By law, Vanguard must withhold 24% of any taxable distributions or redemptions from your account if you do not:
• Provide your correct taxpayer identification number.
• Certify that the taxpayer identification number is correct.
• Confirm that you are not subject to backup withholding.
Similarly, Vanguard (or your intermediary) must withhold taxes from your account if the IRS instructs us to do so.
Foreign investors. Vanguard funds offered for sale in the United States (Vanguard U.S. funds), including the Fund offered in this prospectus, are not widely available outside the United States. Non-U.S. investors should be aware that U.S. withholding and estate taxes and certain U.S. tax reporting requirements may apply to any investments in Vanguard U.S. funds. Foreign investors should visit the non-U.S. investors page on our website at vanguard.com for information on Vanguard’s non-U.S. products.
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Invalid addresses. If an income dividend distribution or capital gains distribution check mailed to your address of record is returned as undeliverable, Vanguard will automatically reinvest the distribution and all future distributions until you provide us with a valid mailing address. Reinvestments will receive the net asset value calculated on the date of the reinvestment.
Share Price
Share price, also known as net asset value (NAV), is calculated as of the close of regular trading on the New York Stock Exchange (NYSE), generally 4 p.m., Eastern time, on each day that the NYSE is open for business (a business day). In the rare event the NYSE experiences unanticipated disruptions and is unavailable at the close of the trading day, NAVs will be calculated as of the close of regular trading on the Nasdaq (or another alternate exchange if the Nasdaq is unavailable, as determined at Vanguard’s discretion), generally 4 p.m., Eastern time. Each share class has its own NAV, which is computed by dividing the total assets, minus liabilities, allocated to the share class by the number of Fund shares outstanding for that class. On U.S. holidays or other days when the NYSE is closed, the NAV is not calculated, and the Fund does not sell or redeem shares.
Debt securities held by a Vanguard fund are valued based on information furnished by an independent pricing service or market quotations. When a fund determines that pricing-service information or market quotations either are not readily available or do not accurately reflect the value of a security, the security is priced at its fair value (the amount that the owner might reasonably expect to receive upon the current sale of the security).
The values of any foreign securities held by a fund are converted into U.S. dollars using an exchange rate obtained from an independent third party as of the close of regular trading on the NYSE. The values of any mutual fund shares, including institutional money market fund shares, held by a fund are based on the NAVs of the shares. The values of any ETF shares or closed-end fund shares held by a fund are based on the market value of the shares.
A fund also may use fair-value pricing on bond market holidays when the fund is open for business (such as Columbus Day and Veterans Day). Fair-value prices are determined by Vanguard according to procedures adopted by the board of trustees. When fair-value pricing is employed, the prices of securities used by a fund to calculate the NAV may differ from quoted or published prices for the same securities.
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The Fund has authorized certain financial intermediaries and their designees, and may, from time to time, authorize certain funds of funds for which Vanguard serves as the investment advisor (Vanguard Funds of Funds), to accept orders to buy or sell fund shares on its behalf. The Fund will be deemed to receive an order when accepted by the financial intermediary, its designee, or one of the Vanguard Funds of Funds, and the order will receive the NAV next computed by the Fund after such acceptance.
Vanguard fund share prices are published daily on our website at vanguard.com/prices.
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Financial Highlights
Financial highlights information is intended to help you understand a fund’s performance for the past five years (or, if shorter, its period of operations). Certain information reflects financial results for a single fund share. Total return represents the rate that an investor would have earned or lost each period on an investment in a fund or share class (assuming reinvestment of all distributions). This information has been obtained from the financial statements audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, whose report, along with fund financial statements, is included in a fund’s most recent annual report to shareholders. You may obtain a free copy of a fund’s latest annual or semiannual report, which is available upon request.
Vanguard Core Bond Fund Investor Shares
For a Share Outstanding
Throughout Each Period
Year Ended September 30,
2023
2022
2021
2020
2019
Net Asset Value, Beginning of Period
$8.86
$10.67
$10.93
$10.24
$9.59
Investment Operations
Net Investment Income1
.353
.221
.125
.209
.311
Net Realized and Unrealized Gain (Loss) on Investments
(.251)
(1.810)
(.126)
.697
.645
Total from Investment Operations
.102
(1.589)
(.001)
.906
.956
Distributions
Dividends from Net Investment Income
(.342)
(.213)
(.117)
(.216)
(.306)
Distributions from Realized Capital Gains
(.008)
(.142)
Total Distributions
(.342)
(.221)
(.259)
(.216)
(.306)
Net Asset Value, End of Period
$8.62
$8.86
$10.67
$10.93
$10.24
Total Return2
1.07%
-15.06%
-0.03%
8.95%
10.15%
Ratios/Supplemental Data
 
 
 
 
 
Net Assets, End of Period (Millions)
$220
$203
$246
$236
$117
Ratio of Total Expenses to Average Net Assets
0.20%3
0.20%3
0.20%
0.25%
0.25%
Ratio of Net Investment Income to Average Net Assets
3.93%
2.22%
1.16%
1.96%
3.16%
Portfolio Turnover Rate4
439%
499%
473%
383%
406%
 
 
 
 
 
 
 
 
1
Calculated based on average shares outstanding.
2
Total returns do not include account service fees that may have applied in the periods shown.
Fund prospectuses provide information about any applicable account service fees.
3
The ratio of expenses to average net assets for the period net of reduction from custody fee
offset arrangements was 0.20%.
4
Includes 212%, 146%, 167%, 68%, and 32%, respectively, attributable to mortgage-dollar-
roll activity.
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Vanguard Core Bond Fund Admiral Shares
For a Share Outstanding
Throughout Each Period
Year Ended September 30,
2023
2022
2021
2020
2019
Net Asset Value, Beginning of Period
$17.72
$21.33
$21.86
$20.48
$19.18
Investment Operations
Net Investment Income1
.726
.473
.266
.436
.651
Net Realized and Unrealized Gain (Loss) on Investments
(.514)
(3.622)
(.257)
1.407
1.290
Total from Investment Operations
.212
(3.149)
.009
1.843
1.941
Distributions
Dividends from Net Investment Income
(.702)
(.446)
(.256)
(.463)
(.641)
Distributions from Realized Capital Gains
(.015)
(.283)
Total Distributions
(.702)
(.461)
(.539)
(.463)
(.641)
Net Asset Value, End of Period
$17.23
$17.72
$21.33
$21.86
$20.48
Total Return2
1.11%
-14.93%
0.03%
9.11%
10.31%
Ratios/Supplemental Data
 
 
 
 
 
Net Assets, End of Period (Millions)
$8,373
$6,225
$5,558
$3,212
$1,114
Ratio of Total Expenses to Average Net Assets
0.10%3
0.10%3
0.10%
0.10%
0.10%
Ratio of Net Investment Income to Average Net Assets
4.05%
2.39%
1.24%
2.04%
3.31%
Portfolio Turnover Rate4
439%
499%
473%
383%
406%
 
 
 
 
 
 
 
 
1
Calculated based on average shares outstanding.
2
Total returns do not include account service fees that may have applied in the periods shown.
Fund prospectuses provide information about any applicable account service fees.
3
The ratio of expenses to average net assets for the period net of reduction from custody fee
offset arrangements was 0.10%.
4
Includes 212%, 146%, 167%, 68%, and 32%, respectively, attributable to mortgage-dollar-
roll activity.
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Investing With Vanguard
This section of the prospectus explains the basics of doing business with Vanguard. Vanguard fund shares can be held indirectly through an intermediary, such as a bank, a broker, or an investment advisor. If you hold Vanguard fund shares indirectly through an intermediary (including shares held in a brokerage account through Vanguard Brokerage Services®), please see Investing With Vanguard Through Other Firms, and also refer to your account agreement with the intermediary for information about transacting in that account. If you hold Vanguard fund shares through an employer-sponsored retirement or savings plan, please see Employer-Sponsored Plans. Vanguard reserves the right to change the policies in this section without notice. Please call or check online for current information. See Contacting Vanguard.

In certain circumstances, Vanguard fund shares can be held directly with Vanguard. If you hold Vanguard fund shares directly with Vanguard, you should carefully read each topic within this section that pertains to your relationship with Vanguard. Vanguard reserves the right, upon reasonable notice, to discontinue the ability to hold Vanguard fund shares directly with Vanguard for any or all investors and/or to transfer such shares to an affiliate or other financial institution.
For Vanguard fund shares held directly with Vanguard, each fund you hold in an account is a separate “fund account.” For example, if you hold three funds in a nonretirement account titled in your own name, two funds in a nonretirement account titled jointly with your spouse, and one fund in an individual retirement account, you have six fund accounts—and this is true even if you hold the same fund in multiple accounts. Note that each reference to “you” in this prospectus applies to any one or more registered account owners or persons authorized to transact on your account.
Purchasing Shares
Vanguard reserves the right, without notice, to increase or decrease the minimum amount required to open, convert shares to, or maintain a fund account or to add to an existing fund account.
Investment minimums may differ for certain categories of investors.
Account Minimums for Investor Shares
To open and maintain an account. $3,000.
To add to an existing account. Generally $1.
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Account Minimums for Admiral Shares
To open and maintain an account. $50,000. If you request Admiral Shares when you open a new account but the investment amount does not meet the account minimum for Admiral Shares, your investment will be placed in Investor Shares of the Fund. Financial intermediaries, institutional clients, and Vanguard-advised clients should contact Vanguard for information on special eligibility rules that may apply to them regarding Admiral Shares. If you are investing through an intermediary, please contact that firm directly for more information regarding your eligibility.
To add to an existing account. Generally $1.
How to Initiate a Purchase Request
Be sure to check Exchanging Shares, Frequent-Trading Limitations, and Other Rules You Should Know before placing your purchase request.
Online. You may open certain types of accounts, request a purchase of shares, and request an exchange through our website or our mobile application if your account is eligible and you are registered for online access.
By telephone. You may call Vanguard to begin the account registration process or request that the account-opening forms be sent to you. You may also call Vanguard to request a purchase of shares in your account or to request an exchange. See Contacting Vanguard.
By mail. You may send Vanguard your account registration form and check to open a new fund account. To add to an existing fund account, you may send your check with an Invest-by-Mail form (from a transaction confirmation or your account statement) or with a deposit slip (available online).
How to Pay for a Purchase
By electronic bank transfer. You may purchase shares of a Vanguard fund through an electronic transfer of money from a bank account. To establish the electronic bank transfer service on an account, you must designate the bank account online, complete a form, or fill out the appropriate section of your account registration form. After the service is set up on your account, you can purchase shares by electronic bank transfer on a regular schedule (Automatic Investment Plan), if eligible, or upon request. Your purchase request can be initiated online (if you are registered for online access), by telephone, or by mail.
By wire. Wiring instructions vary for different types of purchases. Please call Vanguard for instructions and policies on purchasing shares by wire. See Contacting Vanguard.
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By check. You may make initial or additional purchases to your fund account by sending a check with a deposit slip or by utilizing our mobile application if your account is eligible and you are registered for online access. Also see How to Initiate a Purchase Request. Make your check payable to Vanguard and include the appropriate fund number (e.g., Vanguard—xx). For a list of Fund numbers (for share classes in this prospectus), see Additional Information.
By exchange. You may purchase shares of a Vanguard fund using the proceeds from the simultaneous redemption of shares of another Vanguard fund. You may initiate an exchange online (if you are registered for online access), by telephone, or by mail with an exchange form. See Exchanging Shares.
Trade Date
The trade date for any purchase request received in good order will depend on the day and time Vanguard receives your request, the manner in which you are paying, and the type of fund you are purchasing. Your purchase will be executed using the NAV as calculated on the trade date. NAVs are calculated only on days that the NYSE is open for trading (a business day). In the rare event the NYSE experiences unanticipated disruptions and is unavailable at the close of the trading day, NAVs will be calculated as of the close of regular trading on the Nasdaq (or another alternate exchange if the Nasdaq is unavailable, as determined at Vanguard’s discretion), generally 4 p.m., Eastern time. The time selected for NAV calculation in this rare event shall also serve as the conclusion of the trading day. See Share Price.
For purchases by check into all funds other than money market funds and for purchases by exchange, wire, or electronic bank transfer into all funds: If the purchase request is received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the trade date for the purchase will be the same day. If the purchase request is received on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the trade date for the purchase will be the next business day.
For purchases by check into money market funds: If the purchase request is received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the trade date for the purchase will be the next business day. If the purchase request is received on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the trade date for the purchase will be the second business day following the day Vanguard receives the purchase request. Because money market instruments must be purchased with federal funds and it takes a money market mutual fund one business day to convert check proceeds into federal funds, the trade date for the purchase will be one business day later than for other funds.
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If applicable, orders by Vanguard Funds of Funds will be treated as received by the Fund at the same time that corresponding orders are received in proper form by the Vanguard Funds of Funds.
If your purchase request is not accurate and complete, it may be rejected. See Other Rules You Should Know—Good Order.
For further information about purchase transactions, consult our website at vanguard.com or see Contacting Vanguard.
Other Purchase Rules You Should Know
Admiral Shares. Admiral Shares generally are not available for SIMPLE IRAs and Vanguard Individual 401(k) Plans.
Check purchases. All purchase checks must be written in U.S. dollars, be drawn on a U.S. bank, and be accompanied by good order instructions. Vanguard does not accept cash, traveler’s checks, starter checks, or money orders. In addition, Vanguard may refuse checks that are not made payable to Vanguard.
New accounts. We are required by law to obtain from you certain personal information that we will use to verify your identity. If you do not provide the information, we may not be able to open your account. If we are unable to verify your identity, Vanguard reserves the right, without notice, to close your account or take such other steps as we deem reasonable. Certain types of accounts may require additional documentation.
Refused or rejected purchase requests. Vanguard reserves the right to stop selling fund shares or to reject any purchase request at any time and without notice, including, but not limited to, purchases requested by exchange from another Vanguard fund. This also includes the right to reject any purchase request because the investor has a history of frequent trading or because the purchase may negatively affect a fund’s operation or performance.
Large purchases. Call Vanguard before attempting to invest a large dollar amount.
No cancellations. Vanguard will not accept your request to cancel any purchase request once processing has begun. Please be careful when placing a purchase request.
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Converting Shares
When a conversion occurs, you receive shares of one class in place of shares of another class of the same fund. At the time of conversion, the dollar value of the “new” shares you receive equals the dollar value of the “old” shares that were converted. In other words, the conversion has no effect on the value of your investment in the fund at the time of the conversion. However, the number of shares you own after the conversion may be greater than or less than the number of shares you owned before the conversion, depending on the NAVs of the two share classes.
Vanguard will not accept your request to cancel any self-directed conversion request once processing has begun. Please be careful when placing a conversion request.
A conversion between share classes of the same fund is a nontaxable event.
Trade Date
The trade date for any conversion request received in good order will depend on the day and time Vanguard receives your request. Your conversion will be executed using the NAVs of the different share classes on the trade date. NAVs are calculated only on days that the NYSE is open for trading (a business day). In the rare event the NYSE experiences unanticipated disruptions and is unavailable at the close of the trading day, NAVs will be calculated as of the close of regular trading on the Nasdaq (or another alternate exchange if the Nasdaq is unavailable, as determined at Vanguard’s discretion), generally 4 p.m., Eastern time. The time selected for NAV calculation in this rare event shall also serve as the conclusion of the trading day. See Share Price.
For a conversion request received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the trade date will be the same day. For a conversion request received on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the trade date will be the next business day. See Other Rules You Should Know.
Conversions From Investor Shares to Admiral Shares
Self-directed conversions. If your account balance in the Fund is at least $50,000, you may ask Vanguard to convert your Investor Shares to Admiral Shares. You may request a conversion through our website (if you are registered for online access), by telephone, or by mail. Financial intermediaries, institutional clients, and Vanguard-advised clients should contact Vanguard for information on
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special eligibility rules that may apply to them regarding Admiral Shares. See Contacting Vanguard. If you are investing through an intermediary, please contact that firm directly for more information regarding your eligibility.
Automatic conversions. Vanguard conducts periodic reviews of account balances and may, if your account balance in the Fund exceeds $50,000, automatically convert your Investor Shares to Admiral Shares. You will be notified before an automatic conversion occurs and will have an opportunity to instruct Vanguard not to effect the conversion. Financial intermediaries, institutional clients, and Vanguard-advised clients should contact Vanguard for information on special eligibility rules that may apply to them regarding Admiral Shares. If you are investing through an intermediary, please contact that firm directly for more information regarding your eligibility.
Mandatory Conversions to Investor Shares
If an account no longer meets the balance requirements for Admiral Shares, Vanguard may automatically convert the shares in the account to Investor Shares. A decline in the account balance because of market movement may result in such a conversion. Vanguard will notify the investor in writing before any mandatory conversion occurs.
Redeeming Shares
How to Initiate a Redemption Request
Be sure to check Exchanging Shares, Frequent-Trading Limitations, and Other Rules You Should Know before placing your redemption request.
Online. You may request a redemption of shares or request an exchange through our website or our mobile application if your account is eligible and you are registered for online access.
By telephone. You may call Vanguard to request a redemption of shares or an exchange. See Contacting Vanguard.
By mail. You may send a form (available online) to Vanguard to redeem from a fund account or to make an exchange.
By writing a check. If your account is eligible and you have established the checkwriting service on your account, you can redeem shares by writing a check for $250 or more.
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How to Receive Redemption Proceeds
By electronic bank transfer. You may have the proceeds of a fund redemption sent directly to a designated bank account. To establish the electronic bank transfer service on an account, you must designate a bank account online, complete a form, or fill out the appropriate section of your account registration form. After the service is set up on your account, you can redeem shares by electronic bank transfer on a regular schedule (Automatic Withdrawal Plan), if eligible, or upon request. Your redemption request can be initiated online (if you are registered for online access), by telephone, or by mail.
By wire. To receive your proceeds by wire, you may instruct Vanguard to wire your redemption proceeds ($100 minimum) to a previously designated bank account. To establish the wire redemption service, you generally must designate a bank account online, complete a form, or fill out the appropriate section of your account registration form.
Please note that Vanguard charges a $10 wire fee for outgoing wire redemptions. The fee is assessed in addition to, rather than being withheld from, redemption proceeds and is paid directly to the fund in which you invest. For example, if you redeem $100 via a wire, you will receive the full $100, and the $10 fee will be assessed to your fund account through an additional redemption of fund shares. If you redeem your entire fund account, your redemption proceeds will be reduced by the amount of the fee. The wire fee does not apply to accounts held by Flagship and Flagship Select clients; accounts held through intermediaries, including Vanguard Brokerage Services; or accounts held by institutional clients.
By exchange. You may have the proceeds of a Vanguard fund redemption invested directly in shares of another Vanguard fund. You may initiate an exchange online (if you are registered for online access), by telephone, or by mail. See Exchanging Shares.
By check. If you have not chosen another redemption method, Vanguard will mail you a redemption check, generally payable to all registered account owners, normally within two business days of your trade date, and generally to the address of record.
Trade Date
The trade date for any redemption request received in good order will depend on the day and time Vanguard receives your request and the manner in which you are redeeming. Your redemption will be executed using the NAV as calculated on the trade date. NAVs are calculated only on days that the NYSE is open for trading (a business day). In the rare event the NYSE experiences unanticipated disruptions and is unavailable at the close of the trading day, NAVs will be
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calculated as of the close of regular trading on the Nasdaq (or another alternate exchange if the Nasdaq is unavailable, as determined at Vanguard’s discretion), generally 4 p.m., Eastern time. The time selected for NAV calculation in this rare event shall also serve as the conclusion of the trading day. See Share Price.
For redemptions by check, exchange, or wire: If the redemption request is received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the trade date will be the same day. If the redemption request is received on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the trade date will be the next business day.
• Note on timing of wire redemptions from money market funds: For telephone requests received by Vanguard on a business day before 10:45 a.m., Eastern time (2 p.m., Eastern time, for Vanguard Cash Reserves Federal Money Market Fund; 12:30 p.m., Eastern time, for Vanguard Federal Money Market Fund), the redemption proceeds generally will leave Vanguard by the close of business the same day. For telephone requests received by Vanguard on a business day after those cut-off times, or on a nonbusiness day, and for all requests other than by telephone, the redemption proceeds generally will leave Vanguard by the close of business on the next business day.
• Note on timing of wire redemptions from all other funds: For requests received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the redemption proceeds generally will leave Vanguard by the close of business on the next business day. For requests received by Vanguard on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the redemption proceeds generally will leave Vanguard by the close of business on the second business day after Vanguard receives the request.
For redemptions by electronic bank transfer: If the redemption request is received by Vanguard on a business day before the close of regular trading on the NYSE (generally 4 p.m., Eastern time), the trade date will be the same day. If the redemption request is received on a business day after the close of regular trading on the NYSE, or on a nonbusiness day, the trade date will be the next business day.
If your redemption request is not accurate and complete, it may be rejected. If we are unable to send your redemption proceeds by wire or electronic bank transfer because the receiving institution rejects the transfer, Vanguard will make additional efforts to complete your transaction. If Vanguard is still unable to complete the transaction, we may send the proceeds of the redemption to you by
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check, generally payable to all registered account owners, or use your proceeds to purchase new shares of the fund from which you sold shares for the purpose of the wire or electronic bank transfer transaction. See Other Rules You Should Know—Good Order.
If your redemption request is received in good order, we typically expect that redemption proceeds will be paid by the Fund within one business day of the trade date; however, in certain circumstances, investors may experience a longer settlement period at the time of the transaction. For further information, see “Potentially disruptive redemptions” and “Emergency circumstances.”
For further information about redemption transactions, consult our website at vanguard.com or see Contacting Vanguard.
Other Redemption Rules You Should Know
Documentation for certain accounts. Special documentation may be required to redeem from certain types of accounts, such as trust, corporate, nonprofit, or retirement accounts. Please call us before attempting to redeem from these types of accounts.
Potentially disruptive redemptions. Vanguard reserves the right to pay all or part of a redemption in kind—that is, in the form of securities—if we reasonably believe that a cash redemption would negatively affect the fund’s operation or performance or that the shareholder may be engaged in market-timing or frequent trading. Under these circumstances, Vanguard also reserves the right to delay payment of the redemption proceeds for up to seven calendar days. By calling us before you attempt to redeem a large dollar amount, you may avoid in-kind or delayed payment of your redemption. Please see Frequent-Trading Limitations for information about Vanguard’s policies to limit frequent trading.
Recently purchased shares. Although you can redeem shares at any time, proceeds may not be made available to you until the fund collects payment for your purchase. This may take up to seven calendar days for shares purchased by check or by electronic bank transfer. If you have written a check on a fund in an account with checkwriting privileges, that check may be rejected if your fund account does not have a sufficient available balance.
Address change. If you change your address online or by telephone, there may be up to a 14-day restriction (starting on the business day after your address is changed) on your ability to request check redemptions online and by telephone. You can request a redemption in writing (using a form available online) at any time. Confirmations of address changes are sent to both the old and new addresses.
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Payment to a different person or address. At your request, we can make your redemption check payable, or wire your redemption proceeds, to a different person or send it to a different address. However, this generally requires the written consent of all registered account owners and may require additional documentation, such as a signature guarantee or a notarized signature. You may obtain a signature guarantee from some commercial or savings banks, credit unions, trust companies, or member firms of a U.S. stock exchange.
No cancellations. Vanguard will not accept your request to cancel any redemption request once processing has begun. Please be careful when placing a redemption request.
Emergency circumstances. Vanguard funds can postpone payment of redemption proceeds for up to seven calendar days. In addition, Vanguard funds can suspend redemptions and/or postpone payments of redemption proceeds beyond seven calendar days at times when the NYSE is closed or during emergency circumstances, as determined by the SEC.
Exchanging Shares
An exchange occurs when you use the proceeds from the redemption of shares of one Vanguard fund to simultaneously purchase shares of a different Vanguard fund. You can make exchange requests online (if you are registered for online access), by telephone, or by mail. See Purchasing Shares and Redeeming Shares.
If the NYSE is open for regular trading (generally until 4 p.m., Eastern time, on a business day) at the time an exchange request is received in good order, the trade date generally will be the same day. See Other Rules You Should Know—Good Order for additional information on all transaction requests.
Vanguard will not accept your request to cancel any exchange request once processing has begun. Please be careful when placing an exchange request.
Call Vanguard before attempting to exchange a large dollar amount. By calling us before you attempt to exchange a large dollar amount, you may avoid delayed or rejected transactions.
Please note that Vanguard reserves the right, without notice, to revise or terminate the exchange privilege, limit the amount of any exchange, or reject an exchange, at any time, for any reason. See Frequent-Trading Limitations for additional restrictions on exchanges.
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Frequent-Trading Limitations
Because excessive transactions can disrupt management of a fund and increase the fund’s costs for all shareholders, the board of trustees of each Vanguard fund places certain limits on frequent trading in the funds. Each Vanguard fund (other than money market funds and short-term bond funds, but including Vanguard Short-Term Inflation-Protected Securities Index Fund) limits an investor’s purchases or exchanges into a fund account for 30 calendar days after the investor has redeemed or exchanged out of that fund account. ETF Shares are not subject to these frequent-trading limits.
For Vanguard Retirement Investment Program pooled plans, the limitations apply to exchanges made online or by telephone.
These frequent-trading limitations do not apply to the following:
• Certain transactions below dollar value or other thresholds specified by Vanguard.
• In-kind transactions to a shareholder’s donor advised fund managed by Vanguard Charitable.
• Purchases of shares with reinvested dividend or capital gains distributions.
• Transactions through Vanguard’s Automatic Investment Plan, Automatic Exchange Service, Direct Deposit Service, Automatic Withdrawal Plan, Required Minimum Distribution Service, Vanguard Small Business Online®, and certain transactions through intermediaries relating to systematic trades and required minimum distributions.
• Discretionary transactions through Vanguard Personal Advisor Services®, Vanguard Institutional Advisory Services®, Vanguard Digital Advisor™, and discretionary (advisor-directed) transactions through certain intermediaries.
• Redemptions of shares to pay fund or account fees.
• Redemptions of shares to remove excess shareholder contributions to certain types of retirement accounts (including, but not limited to, IRAs and Vanguard Individual 401(k) Plans).
• Transfers and reregistrations of shares within the same fund.
• Purchases of shares by asset transfer or direct rollover.
• Conversions of shares from one share class to another in the same fund.
• Checkwriting redemptions.
• Section 529 college savings plans.
• Certain approved institutional portfolios and asset allocation programs, as well as trades made by funds or trusts managed by Vanguard or its affiliates that
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invest in other Vanguard funds. (Please note that shareholders of Vanguard’s funds of funds are subject to the limitations.)
For participants in employer-sponsored defined contribution plans,* the frequent-trading limitations do not apply to:
• Purchases of shares with participant payroll or employer contributions or loan repayments.
• Purchases of shares with reinvested dividend or capital gains distributions.
• Distributions, loans, and in-service withdrawals from a plan.
• Redemptions of shares as part of a plan termination or at the direction of the plan.
• Transactions executed through the Vanguard Managed Account Program.
• Redemptions of shares to pay fund or account fees.
• Share or asset transfers or rollovers.
• Reregistrations of shares.
• Conversions of shares from one share class to another in the same fund.
• Exchange requests submitted by written request to Vanguard. (Exchange requests submitted by fax, if otherwise permitted, are subject to the limitations.)
* The following Vanguard fund accounts are subject to the frequent-trading limitations: SEP-IRAs, SIMPLE IRAs, certain Individual 403(b)(7) Custodial Accounts, and Vanguard Individual 401(k) Plans.
Accounts Held by Institutions (Other Than Defined Contribution Plans)
Vanguard will systematically monitor for frequent trading in institutional clients’ accounts. If we detect suspicious trading activity, we will investigate and take appropriate action, which may include applying to a client’s accounts the 30-day policy previously described, prohibiting a client’s purchases of fund shares, and/or revoking the client’s exchange privilege.
Accounts Held by Intermediaries
When intermediaries establish accounts in Vanguard funds for the benefit of their clients, we cannot always monitor the trading activity of the individual clients. However, we review trading activity at the intermediary (omnibus) level, and if we detect suspicious activity, we will investigate and take appropriate action. If necessary, Vanguard may prohibit additional purchases of fund shares by an intermediary, including for the benefit of certain of the intermediary’s clients. Intermediaries also may monitor their clients’ trading activities with respect to Vanguard funds.
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For those Vanguard funds that charge purchase and/or redemption fees, intermediaries will be asked to assess these fees on client accounts and remit these fees to the funds. The application of purchase and redemption fees and frequent-trading limitations may vary among intermediaries. There are no assurances that Vanguard will successfully identify all intermediaries or that intermediaries will properly assess purchase and redemption fees or administer frequent-trading limitations. If you invest with Vanguard through an intermediary, please read that firm’s materials carefully to learn of any other rules or fees that may apply.
Other Rules You Should Know
Prospectus and Shareholder Report Mailings
When two or more shareholders have the same last name and address, just one summary prospectus (or prospectus) and/or shareholder report may be sent in an attempt to eliminate the unnecessary expense of duplicate mailings. You may request individual prospectuses and reports by contacting our Client Services Department in writing, by telephone, or online. See Contacting Vanguard.
Vanguard.com
Registration. If you are a registered user of vanguard.com, you can review your account holdings; buy, sell, or exchange shares of most Vanguard funds; and perform most other transactions through our website. You must register for this service online.
Electronic delivery. Vanguard can deliver your account statements, transaction confirmations, prospectuses, certain tax forms, and shareholder reports electronically. If you are a registered user of vanguard.com, you can consent to the electronic delivery of these documents by logging on and changing your mailing preferences under “Account Maintenance.” You can revoke your electronic consent at any time through our website, and we will begin to send paper copies of these documents within 30 days of receiving your revocation.
Telephone Transactions
Automatic. When we set up your account, we will automatically enable you to do business with us by telephone, unless you instruct us otherwise in writing.
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Proof of a caller’s authority. We reserve the right to refuse a telephone request if the caller is unable to provide the requested information or if we reasonably believe that the caller is not an individual authorized to act on the account. Before we allow a caller to act on an account, we may request the following information:
• Authorization to act on the account (as the account owner or by legal documentation or other means).
• Account registration and address.
• Fund name and account number, if applicable.
• Other information relating to the caller, the account owner, or the account.
Good Order
We reserve the right to reject any transaction instructions that are not in “good order.” Good order generally means that your instructions:
• Are provided by the person(s) authorized in accordance with Vanguard’s policies and procedures to access the account and request transactions.
• Include the fund name and account number.
• Include the amount of the transaction (stated in dollars, shares, or percentage).
Written instructions also must generally be provided on a Vanguard form and include:
• Signature(s) and date from the authorized person(s).
• Signature guarantees or notarized signatures, if required for the type of transaction. (Call Vanguard for specific requirements.)
• Any supporting documentation that may be required.
Good order requirements may vary among types of accounts and transactions. For more information, consult our website at vanguard.com or see Contacting Vanguard.
Vanguard reserves the right, without notice, to revise the requirements for good order.
Future Trade-Date Requests
Vanguard does not accept requests to hold a purchase, conversion, redemption, or exchange transaction for a future date. All such requests will receive trade dates as previously described in Purchasing Shares, Converting Shares, Redeeming Shares, and Exchanging Shares. Vanguard reserves the right to return future-dated purchase checks.
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Accounts With More Than One Owner
If an account has more than one owner or authorized person, Vanguard generally will accept instructions from any one owner or authorized person.
Responsibility for Fraud
You should take precautions to protect yourself from fraud. Keep your account-related information private, and review any account confirmations, statements, or other information that we provide to you as soon as you receive them. Let us know immediately if you discover unauthorized activity or see something on your account that you do not understand or that looks unusual.
Vanguard will not be responsible for losses that result from transactions by a person who we reasonably believe is authorized to act on your account.
Uncashed Checks
Please cash your distribution or redemption checks promptly. Vanguard will not pay interest on uncashed checks. Vanguard may be required to transfer assets related to uncashed checks to a state under the state’s abandoned property law.
Dormant Accounts
If your account has no activity in it for a period of time, Vanguard may be required to transfer it to a state under the state’s abandoned property law, subject to potential federal or state withholding taxes.
Unusual Circumstances
If you experience difficulty contacting Vanguard online or by telephone, you can send us your transaction request on a Vanguard form by regular or express mail.
Investing With Vanguard Through Other Firms
You may purchase or sell shares of most Vanguard funds through a financial intermediary, such as a bank, a broker, or an investment advisor. Please consult your financial intermediary to determine which, if any, shares are available through that firm and to learn about other rules that may apply. Your financial intermediary can provide you with account information and any required tax forms. You may be required to pay a commission on purchases of mutual fund shares made through a financial intermediary.
Please see Frequent-Trading Limitations—Accounts Held by Intermediaries for information about the assessment of any purchase or redemption fees and the monitoring of frequent trading for accounts held by intermediaries.
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Account Service Fee
Vanguard may charge a $25 account service fee on fund accounts that have a balance below $5,000,000 for any reason, including market fluctuation. The account service fee may be applied to both retirement and nonretirement fund accounts and may be assessed on fund accounts in all Vanguard funds, regardless of the account minimum. The fee, which will be collected by redeeming fund shares in the amount of $25, will be deducted from fund accounts subject to the fee once per calendar year.
Certain account types have alternative fee structures, including SIMPLE IRAs, Vanguard Retirement Investment Program pooled plans, and Vanguard Individual 401(k) Plans.
Low-Balance Accounts
The Fund reserves the right to liquidate a fund account whose balance falls below the account minimum for any reason, including market fluctuation. This liquidation policy applies to nonretirement fund accounts and accounts that are held through intermediaries. Any such liquidation will be preceded by written notice to the investor.
Right to Change Policies
In addition to the rights expressly stated elsewhere in this prospectus, Vanguard reserves the right, without notice, to (1) alter, add, or discontinue any conditions of purchase (including eligibility requirements), redemption, exchange, conversion, service, or privilege at any time and (2) alter, impose, discontinue, or waive any purchase fee, redemption fee, account service fee, or other fee charged to a shareholder or a group of shareholders. Changes may affect any or all investors. These actions will be taken when, at the sole discretion of Vanguard management, Vanguard believes they are in the best interest of a fund.
Account Restrictions
Vanguard reserves the right to: (1) redeem all or a portion of a fund/account to meet a legal obligation, including tax withholding, tax lien, garnishment order, or other obligation imposed on your account by a court or government agency; (2) redeem shares, close an account, or suspend account privileges, features, or options in the case of threatening conduct or activity; (3) redeem shares, close an account, or suspend account privileges, features, or options if Vanguard believes or suspects that not doing so could result in a suspicious, fraudulent, or illegal transaction; (4) place restrictions on the ability to redeem any or all shares in an account if it is required to do so by a court or government agency; (5) place restrictions on the ability to redeem any or all shares in an account if Vanguard believes that doing so will prevent fraud, financial exploitation or abuse, or to
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protect vulnerable investors; (6) freeze any account and/or suspend account services if Vanguard has received reasonable notice of a dispute regarding the assets in an account, including notice of a dispute between the registered or beneficial account owners; and (7) freeze any account and/or suspend account services upon initial notification to Vanguard of the death of an account owner.
Share Classes
Vanguard reserves the right, without notice, to change the eligibility requirements of its share classes, including the types of clients who are eligible to purchase each share class.
Shareholder Rights
The Fund’s Agreement and Declaration of Trust, as amended, requires a shareholder bringing a derivative action on behalf of Vanguard Malvern Funds (the Trust) that is subject to a pre-suit demand to collectively hold at least 10% of the outstanding shares of the Trust or at least 10% of the outstanding shares of the series or class to which the demand relates and to undertake to reimburse the Trust for the expense of any counsel or advisors used when considering the merits of the demand in the event that the board of trustees determines not to bring such action. In each case, these requirements do not apply to claims arising under the federal securities laws to the extent that any such federal securities laws, rules, or regulations do not permit such application.
Fund and Account Updates
Confirmation Statements
We will send (or provide through our website, whichever you prefer) a confirmation of your trade date and the amount of your transaction when you buy, sell, exchange, or convert shares. However, we will not send confirmations reflecting only checkwriting redemptions or the reinvestment of dividend or capital gains distributions. For any month in which you had a checkwriting redemption, a Checkwriting Activity Statement will be sent to you itemizing the checkwriting redemptions for that month. Promptly review each confirmation statement that we provide to you. It is important that you contact Vanguard immediately with any questions you may have about any transaction reflected on a confirmation statement, or Vanguard will consider the transaction properly processed.
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Portfolio Summaries
We will send (or provide through our website, whichever you prefer) quarterly portfolio summaries to help you keep track of your accounts throughout the year. Each summary shows the market value of your account at the close of the statement period, as well as all distributions, purchases, redemptions, exchanges, transfers, and conversions for the current calendar quarter (or month). Promptly review each summary that we provide to you. It is important that you contact Vanguard immediately with any questions you may have about any transaction reflected on the summary, or Vanguard will consider the transaction properly processed.
Tax Information Statements
For most accounts, Vanguard (or your intermediary) is required to provide annual tax forms to assist you in preparing your income tax returns. These forms are generally available for each calendar year early in the following year. Registered users of vanguard.com can also view certain forms through our website. Vanguard (or your intermediary) may also provide you with additional tax-related documentation. For more information, consult our website at vanguard.com or see Contacting Vanguard.
Annual and Semiannual Reports
We will send (or provide through our website, whichever you prefer) reports about Vanguard Core Bond Fund twice a year, in May and November. These reports include overviews of the financial markets and provide the following specific Fund information:
• Performance assessments and comparisons with industry benchmarks.
• Financial statements with listings of Fund holdings.
Portfolio Holdings
Please consult the Fund's Statement of Additional Information or our website for a description of the policies and procedures that govern disclosure of the Fund’s portfolio holdings.
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Employer-Sponsored Plans
Your plan administrator or your employee benefits office can provide you with detailed information on how to participate in your plan and how to elect the Fund as an investment option.
• If you have any questions about the Fund or Vanguard, including those about the Fund’s investment objective, strategies, or risks, contact Vanguard Participant Services toll-free at 800-523-1188 or visit our website at vanguard.com.
• If you have questions about your account, contact your plan administrator or the organization that provides recordkeeping services for your plan.
• Be sure to carefully read each topic that pertains to your transactions with Vanguard.
Vanguard reserves the right to change its policies without notice to shareholders.
Transactions
Processing times for your transaction requests may differ among recordkeepers or among transaction and funding types. Your plan’s recordkeeper (which may also be Vanguard) will determine the necessary processing time frames for your transaction requests prior to submission to the Fund. Consult your recordkeeper or plan administrator for more information.
If Vanguard is serving as your plan recordkeeper and if your transaction involves one or more investments with an early cut-off time for processing or another trading restriction, your entire transaction will be subject to the restriction when the trade date for your transaction is determined.
Contacting Vanguard
Web
 
Vanguard.com
For the most complete source of Vanguard news
For fund, account, and service information
For most account transactions
For literature requests
24 hours a day, 7 days a week
50

Phone
Investor Information 800-662-7447
(Text telephone for people with
hearing impairment at 800-749-7273)
For fund and service information
For literature requests
Client Services 800-662-2739
(Text telephone for people with
hearing impairment at 800-749-7273)
For account information
For most account transactions
Participant Services 800-523-1188
(Text telephone for people with
hearing impairment at 800-749-7273)
For information and services for participants in
employer-sponsored plans
Institutional Division
888-809-8102
For information and services for large institutional
investors
Financial Advisor and Intermediary
Sales Support 800-997-2798
For information and services for financial intermediaries
including financial advisors, broker-dealers, trust
institutions, and insurance companies
Financial Advisory and Intermediary
Trading Support 800-669-0498
For account information and trading support for
financial intermediaries including financial advisors,
broker-dealers, trust institutions, and insurance
companies
Additional Information
The Fund's Bylaws require, unless the Trust otherwise consents in writing, that the U.S. Federal District Courts be the sole and exclusive forum for the resolution of complaints under the Securities Act of 1933. This provision may limit a shareholder’s ability to bring a claim in a different forum and may result in increased shareholder costs in pursuing such a claim.
Vanguard Fund
Inception
Date
Newspaper
Abbreviation
Vanguard
Fund Number
CUSIP
Number
Vanguard Core Bond Fund
Investor Shares
3/28/2016
CoreBdInv
1320
922020847
Admiral Shares
3/28/2016
CoreBdAdm
1520
922020839
CGS identifiers have been provided by CUSIP Global Services, managed on behalf of the American Bankers Association by Standard & Poor’s Financial Services, LLC, and are not for use or dissemination in a manner that would serve as a substitute for any CUSIP service. The CUSIP Database, © 2024 American Bankers Association. “CUSIP” is a registered trademark of the American Bankers Association.
51

CFA® is a registered trademark owned by CFA Institute.
”Bloomberg®” and the Bloomberg U.S. Aggregate Float Adjusted Index (“the Index” or “Bloomberg Index”) are service marks of Bloomberg Finance L.P. and its affiliates, including Bloomberg Index Services Limited (“BISL”), the administrator of the index (collectively, “Bloomberg”), and have been licensed for use for certain purposes by Vanguard.
Vanguard Core Bond Fund is not sponsored, endorsed, sold or promoted by Bloomberg. Bloomberg does not make any representation or warranty, express or implied, to the owners of or counterparties to Vanguard Core Bond Fund or any member of the public regarding the advisability of investing in securities generally or in Vanguard Core Bond Fund particularly. The only relationship of Bloomberg to Vanguard is the licensing of certain trademarks, trade names and service marks and of the Bloomberg U.S. Aggregate Float Adjusted Index, which is determined, composed and calculated by BISL without regard to Vanguard or Vanguard Core Bond Fund. Bloomberg has no obligation to take the needs of Vanguard or the owners of Vanguard Core Bond Fund into consideration in determining, composing or calculating the Bloomberg U.S. Aggregate Float Adjusted Index. Bloomberg is not responsible for and has not participated in the determination of the timing of, prices at, or quantities of Vanguard Core Bond Fund to be issued. Bloomberg shall not have any obligation or liability, including, without limitation, to Vanguard Core Bond Fund customers, in connection with the administration, marketing or trading of Vanguard Core Bond Fund.
BLOOMBERG DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE BLOOMBERG U.S. AGGREGATE FLOAT ADJUSTED INDEX OR ANY DATA RELATED THERETO AND SHALL HAVE NO LIABILITY FOR ANY ERRORS, OMISSIONS OR INTERRUPTIONS THEREIN. BLOOMBERG DOES NOT MAKE ANY WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY VANGUARD, OWNERS OF VANGUARD CORE BOND FUND OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE BLOOMBERG U.S. AGGREGATE FLOAT ADJUSTED INDEX OR ANY DATA RELATED THERETO. BLOOMBERG DOES NOT MAKE ANY EXPRESS OR IMPLIED WARRANTIES AND EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE BLOOMBERG U.S. AGGREGATE FLOAT ADJUSTED INDEX OR ANY DATA RELATED THERETO. WITHOUT LIMITING ANY OF THE FOREGOING, TO THE MAXIMUM EXTENT ALLOWED BY LAW, BLOOMBERG, ITS LICENSORS, AND ITS AND THEIR RESPECTIVE EMPLOYEES, CONTRACTORS, AGENTS, SUPPLIERS, AND VENDORS SHALL HAVE NO LIABILITY OR RESPONSIBILITY WHATSOEVER FOR ANY INJURY OR DAMAGES—WHETHER DIRECT, INDIRECT, CONSEQUENTIAL, INCIDENTAL, PUNITIVE OR OTHERWISE—ARISING IN CONNECTION WITH VANGUARD CORE BOND FUND OR BLOOMBERG U.S. AGGREGATE FLOAT ADJUSTED INDEX OR ANY DATA OR VALUES RELATING THERETO—WHETHER ARISING FROM THEIR NEGLIGENCE OR OTHERWISE, EVEN IF NOTIFIED OF THE POSSIBILITY THEREOF.
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Glossary of Investment Terms
Average Maturity. The average length of time until bonds held by a fund reach maturity and are repaid. In general, the longer the average maturity, the more a fund's share price fluctuates in response to changes in market interest rates. In calculating average maturity, a fund uses a bond’s maturity or, if applicable, an earlier date on which the advisor believes it is likely that a maturity-shortening device (such as a call, put, refunding, prepayment, or redemption provision or an adjustable coupon rate) will cause the bond to be repaid.
Bloomberg U.S. Aggregate Float Adjusted Index. An index that is the broadest representation of the taxable U.S. bond market, including most U.S. Treasury, agency, corporate, mortgage-backed, asset-backed, and international dollar-denominated issues, all with investment-grade ratings and maturities of 1 year or more. This Index weights its constituent securities based on the value of the constituent securities that are available for public trading, rather than the value of all constituent securities.
Bond. A debt security issued by a corporation, a government, or a government agency in exchange for the money the bondholder lends it. In most instances, the issuer agrees to pay back the loan by a specific date and generally to make regular interest payments until that date.
Capital Gains Distributions. Payments to mutual fund shareholders of gains realized on securities that a fund has sold at a profit, minus any realized losses.
Coupon Rate. The interest rate paid by the issuer of a debt security until its maturity. It is expressed as an annual percentage of the face value of the security.
Dividend Distributions. Payments to mutual fund shareholders of income from interest or dividends generated by a fund's investments.
Expense Ratio. A fund's total annual operating expenses expressed as a percentage of the fund's average net assets. The expense ratio includes management and administrative expenses, but it does not include the transaction costs of buying and selling portfolio securities.
Face Value. The amount to be paid at a bond’s maturity; also known as the par value or principal.
Fixed Income Security. An investment, such as a bond, representing a debt that must be repaid by a specified date, and on which the borrower may pay a fixed, variable, or floating rate of interest.
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Inception Date. The date on which the assets of a fund (or one of its share classes) are first invested in accordance with the fund's investment objective. For funds with a subscription period, the inception date is the day after that period ends. Investment performance is generally measured from the inception date.
Investment-Grade Bond. A debt security whose credit quality is considered by independent bond rating agencies, or through independent analysis conducted by a fund's advisor, to be sufficient to ensure timely payment of principal and interest under current economic circumstances. Debt securities rated in one of the four highest rating categories are considered investment-grade. Other debt securities may be considered by an advisor to be investment-grade.
Joint Committed Credit Facility. The Fund participates, along with other funds managed by Vanguard, in a committed credit facility provided by a syndicate of lenders pursuant to a credit agreement that may be renewed annually; each Vanguard fund is individually liable for its borrowings, if any, under the credit facility. The amount and terms of the committed credit facility are subject to approval by the Fund's board of trustees and renegotiation with the lender syndicate on an annual basis.
Mutual Fund. An investment company that pools the money of many people and invests it in a variety of securities in an effort to achieve a specific objective over time.
New York Stock Exchange (NYSE). A stock exchange based in New York City that is open for regular trading on business days, Monday through Friday, from 9:30 a.m. to 4 p.m., Eastern time.
Principal. The face value of a debt instrument or the amount of money put into an investment.
Return of Capital. A return of capital occurs when a fund's distributions exceed its earnings in a fiscal year. A return of capital is a return of all or part of your original investment or amounts paid in excess of your original investment in a fund. In general, a return of capital reduces your cost basis in a fund's shares and is not taxable to you until your cost basis has been reduced to zero.
Securities. Stocks, bonds, money market instruments, and other investments.
Total Return. A percentage change, over a specified time period, in a mutual fund’s net asset value, assuming the reinvestment of all distributions of dividends and capital gains.
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Volatility. The fluctuations in value of a mutual fund or other security. The greater a fund's volatility, the wider the fluctuations in its returns.
Yield. Income (interest or dividends) earned by an investment, expressed as a percentage of the investment’s price.
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For More Information
If you would like more information about Vanguard Core Bond Fund, the following documents are available free upon request:
Annual/Semiannual Reports to Shareholders
Additional information about the Fund's investments is available in the Fund's annual and semiannual reports to shareholders. In the annual report, you will find a discussion of the market conditions and investment strategies that significantly affected the Fund's performance during its last fiscal year.
Statement of Additional Information (SAI)
The SAI provides more detailed information about the Fund and is incorporated by reference into (and thus legally a part of) this prospectus.
To receive a free copy of the latest annual or semiannual report or the SAI, or to request additional information about the Fund or other Vanguard funds, please visit vanguard.com or contact us as follows:
If you are an individual investor:
Telephone: 800-662-7447; Text telephone for people with hearing impairment: 800-749-7273
If you are a participant in an employer-sponsored plan:
Telephone: 800-523-1188; Text telephone for people
with hearing impairment: 800-749-7273
If you are a current Vanguard shareholder and would like information about your account, account transactions, and/or account statements, please call:
Client Services Department
Telephone: 800-662-2739; Text telephone for people with hearing impairment: 800-749-7273
Information Provided by the SEC
Reports and other information about the Fund are available in the EDGAR database on the SEC’s website at sec.gov, or you can receive copies of this information, for a fee, by electronic request at the following email address: [email protected].
Fund's Investment Company Act file number: 811-05628
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