485BPOS
Vanguard Variable Insurance Funds
Money Market Portfolio
April 28, 2023
Prospectus

This prospectus contains financial data for the Portfolio through the fiscal year ended December 31, 2022.

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

Portfolio Summary
Investment Objective
The Portfolio seeks to provide current income while maintaining liquidity and a stable share price of $1.
Fees and Expenses
The following table describes the fees and expenses you may pay if you buy, hold, and sell shares of the Portfolio. The expenses shown in the table and in the example that follows do not reflect additional fees and expenses associated with the annuity or life insurance program through which you invest. If those additional fees and expenses were included, overall expenses would be higher.
Annual Portfolio Operating Expenses
(Expenses that you pay each year as a percentage of the value of your investment)
 
Management Fees
0.13%
12b-1 Distribution Fee
None
Other Expenses
0.02%
Total Annual Portfolio Operating Expenses1
0.15%
1
Vanguard and the Portfolio's board have voluntarily agreed to temporarily limit certain net operating expenses in excess of the Portfolio's daily yield so as to maintain a zero or positive yield for the Portfolio. Vanguard and the Portfolio's board may terminate the temporary expense limitation at any time.
Example
The following example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Portfolio's shares. This example assumes that the Portfolio provides a return of 5% each year and that total annual portfolio 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
$15
$48
$85
$192
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Principal Investment Strategies
Vanguard Variable Insurance Funds Money Market Portfolio (the Money Market Portfolio) invests primarily in high-quality, short-term money market instruments. Under normal circumstances, most of the Portfolio’s assets are invested in securities issued by the U.S. government and its agencies and instrumentalities. Although these securities are high-quality, some of the securities held by the Portfolio are neither guaranteed by the U.S. Treasury nor supported by the full faith and credit of the U.S. government. To be considered high-quality, a security must be determined by Vanguard to present minimal credit risk based in part on a consideration of maturity, portfolio diversification, portfolio liquidity, and credit quality. The Portfolio invests more than 25% of its assets in securities issued by companies in the financial services industry, which includes, without limitation, securities issued by certain government-sponsored enterprises. The Portfolio maintains a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less.


Government money market funds are required to invest at least 99.5% of their total assets in cash, U.S. government securities, and/or repurchase agreements that are collateralized solely by U.S. government securities or cash (collectively, government securities). The Portfolio generally invests 100% of its assets in government securities and therefore will satisfy the 99.5% requirement for designation as a government money market fund.
Principal Risks
The Portfolio is designed for investors with a low tolerance for risk; however, the Portfolio is subject to the following risks, which could affect the Portfolio's performance:
• Income risk, which is the chance that the Portfolio's income will decline because of falling interest rates. The Portfolio’s income declines when interest rates fall because the Portfolio then must invest new cash flow and cash from maturing instruments in lower-yielding instruments. Because the Portfolio’s income is based on short-term interest rates—which can fluctuate significantly over short periods—income risk is expected to be high. A low or negative interest rate environment will adversely affect the Portfolio’s return. Low or negative interest rates, depending on their duration and severity, could prevent the Portfolio from, among other things, providing a positive yield and/or maintaining a stable share price of $1.
• Manager risk, which is the chance that poor security selection will cause the Portfolio to underperform relevant benchmarks or other funds with a similar investment objective.
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• Credit risk, which is the chance that the issuer of a security 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 security to decline. Credit risk should be very low for the Portfolio because it invests primarily in securities that are considered to be of high quality.
• Industry concentration risk, which is the chance that there will be overall problems affecting a particular industry. Because the Portfolio invests more than 25% of its assets in securities issued by companies in the financial services industry, the Portfolio’s performance depends to a greater extent on the overall condition of that industry and is more susceptible to events affecting that industry.
You could lose money by investing in the Portfolio. Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Portfolio is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Portfolio's sponsor has no legal obligation to provide financial support to the Portfolio, and you should not expect that the sponsor will provide financial support to the Portfolio at any time.
Annual Total Returns
The following bar chart and table are intended to help you understand the risks of investing in the Portfolio. The bar chart shows how the performance of the Portfolio has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Portfolio compare with those of a relevant market index and other comparative benchmarks, which have investment characteristics similar to those of the Portfolio. The Portfolio’s returns are net of its expenses but do not reflect additional fees and expenses that are deducted by the annuity or life insurance program through which you invest. If such fees and expenses were included in the calculation of the Portfolio’s returns, the returns would be lower. Effective January 20, 2021, the Portfolio changed its investment strategy and changed its designation to a “government” money market fund. Performance for the periods prior to January 20, 2021 is based on the prior investment strategy utilized by the
Portfolio. The Spliced Variable Insurance U.S. Government Money Market Funds Average reflects the performance of the Variable Insurance Money Market Funds Average through January 19, 2021, and the Variable Insurance U.S. Government Money Market Funds Average thereafter. The inception date for the Variable Insurance U.S. Government Money Market Funds Average was October 31, 2019. Index returns are not provided prior to that date. The inception date for the Variable Insurance U.S. Government Money Market Funds Average was October 31, 2019. Index returns are not provided prior to that date. Returns for
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the Spliced Variable Insurance U.S. Government Money Market Funds Average and the Variable Insurance Money Market Funds Average are derived from data provided by Lipper, a Thomson Reuters Company. Keep in mind that the Portfolio's past performance does not indicate how the Portfolio will perform in the future. Updated performance information is available on our website for Financial Advisors at advisors.vanguard.com or by calling Vanguard toll-free at 800-522-5555.
Annual Total Returns — Money Market Portfolio
During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:
 
Total Return
Quarter
Highest
0.88%
December 31, 2022
Lowest
0.00%
March 31, 2021
Average Annual Total Returns for Periods Ended December 31, 2022
 
1 Year
5 Years
10 Years
Money Market Portfolio
1.51%
1.25%
0.81%
FTSE 3-Month U.S. Treasury Bill Index
(reflects no deduction for fees or expenses)
1.50%
1.24%
0.73%
Variable Insurance U.S. Government Money Market
Funds Average
1.19
Spliced Variable Insurance U.S. Government Money
Market Funds Average
1.19
0.94
0.51
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Investment Advisor
The Vanguard Group, Inc. (Vanguard)
Portfolio Manager
John C. Lanius, Portfolio Manager at Vanguard. He has managed the Portfolio since 2006.
Tax Information
The Portfolio normally distributes its net investment income and net realized capital gains, if any, to its shareholders, which are the insurance company separate accounts that sponsor your variable annuity or variable life insurance contract. The tax consequences to you of your investment in the Portfolio depend on the provisions of the annuity or life insurance contract through which you invest. For more information on taxes, please refer to the prospectus of the annuity or life insurance contract through which Portfolio shares are offered.
Payments to Financial Intermediaries
The Portfolio and its investment advisor do not pay financial intermediaries for sales of Portfolio shares.
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Investing in the Money Market Portfolio
Under Rule 2a-7, the following are the main categories of money market funds:
• Retail money market funds, which may maintain a stable net asset value (NAV) but are subject to liquidity fees and redemption gates.
• Government money market funds, which may maintain a stable NAV but are not required to implement liquidity fees and redemption gates.
• Institutional money market funds, which are required to have a floating NAV and are subject to liquidity fees and redemption gates.
Vanguard Variable Insurance Funds Money Market Portfolio
Vanguard has designated Vanguard Variable Insurance Funds Money Market Portfolio as a government money market fund.
Government money market funds are required to invest at least 99.5% of their total assets in cash, U.S. government securities, and/or repurchase agreements that are collateralized solely by U.S. government securities or cash (collectively, government securities). The Portfolio generally invests 100% of its assets in government securities and therefore will satisfy the 99.5% requirement for designation as a government money market fund.


Government money market funds can also maintain a stable $1.00 NAV through the use of amortized cost accounting and may, but are not required to, implement liquidity fees and redemption gates. The Portfolio will continue to use amortized cost to transact at a stable $1.00 NAV.
The Portfolio does not currently intend to voluntarily implement liquidity fees or redemption gates.
The Portfolio is subject to money market fund reform regulatory risk, which is the chance that future money market fund reforms will affect the Portfolio's investment strategy, fees and expenses, portfolio, share liquidity, and return potential.
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More on the Portfolio
This prospectus describes the principal risks you would face as an investor in this Portfolio. 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 Portfolio investor. 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 Portfolio is the right investment for you. We suggest that you keep this prospectus for future reference.
A Note About Vanguard Variable Insurance Funds
The Money Market Portfolio of Vanguard Variable Insurance Funds is a mutual fund used solely as an investment option for annuity or life insurance contracts offered by insurance companies. This means that you cannot purchase shares of the Portfolio directly, but only through a contract offered by an insurance company.
The Money Market Portfolio is separate from other Vanguard mutual funds, even when the Portfolio and a fund have the same investment objective and advisor. The Portfolio’s investment performance will differ from the performance of other Vanguard funds because of differences in the securities held and because of administrative and insurance costs associated with the annuity or life insurance program through which you invest.
Plain Talk About Costs of Investing
Costs are an important consideration in choosing a mutual fund. That is
because you, as a contract owner, pay a proportionate share of the costs of
operating a fund and any transaction costs incurred when the fund buys or
sells securities. 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 Portfolio uses in pursuit of its investment objective. The board of trustees of Vanguard Variable Insurance Funds (the Board), which oversees the Portfolio's management, may change investment strategies or policies in the
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interest of shareholders without a shareholder vote, unless those strategies or policies are designated as fundamental. The Portfolio generally invests 100% of its assets in government securities and therefore will satisfy the 99.5% requirement for designation as a government money market fund.
Market Exposure
The Portfolio’s principal strategy is to invest in very high-quality money market instruments. Also known as cash equivalent investments, these instruments are considered short term (i.e., they usually mature in 397 days or less). The Portfolio maintains a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less. The Portfolio invests more than 25% of its assets in money market instruments issued by companies in the financial services industry, which includes, without limitation, securities issued by certain government-sponsored enterprises.
Plain Talk About Money Market Instruments
The term “money market instruments” refers to a variety of short-term,
liquid investments, usually with maturities of 397 days or less. Some
common types are U.S. Treasury bills and notes, which are securities issued
by the U.S. government; agency securities, which are securities issued or
guaranteed by a U.S. executive agency or government-sponsored enterprise;
commercial paper, which is a promissory note issued by a large company or
a financial firm; banker’s acceptances, which are credit instruments
guaranteed by banks; and negotiable certificates of deposit, which are
promissory notes issued by banks in large denominations. Money market
investments can pay fixed, variable, or floating rates of interest.
The Portfolio is subject to income risk, which is the chance that the Portfolio's income will decline because of falling interest rates. The Portfolio's income declines when interest rates fall because the Portfolio then must invest new cash flow and cash from maturing instruments in lower-yielding instruments. Because the Portfolio’s income is based on short-term interest rates—which can fluctuate significantly over short periods—income risk is expected to be high.
A low or negative interest rate environment could magnify the risks associated with changes in interest rates and adversely affect the Portfolio's return. Low or negative interest rates, depending on their duration and severity, can prevent the Portfolio from providing a positive yield to its shareholders, paying expenses out of current income, and/or achieving its investment objective, including maintaining a stable share price of $1. A wide variety of market factors can
8

cause interest rates to rise or fall, including central bank monetary policy, inflationary or deflationary pressures, and changes in general market and economic conditions.
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 Portfolio's investments and Portfolio performance.
Security Selection
Vanguard, advisor to the Portfolio, selects high-quality money market instruments.
The Portfolio is subject to manager risk, which is the chance that poor security selection will cause the Portfolio to underperform relevant benchmarks or other funds with a similar investment objective.
The Portfolio invests primarily in securities issued by U.S. governmental agencies and instrumentalities whose interest and principal payments are backed by the full faith and credit of the U.S. government, such as those issued by the U.S. Treasury and the Government National Mortgage Association (GNMA). The Portfolio also may invest in securities issued by U.S. governmental agencies and instrumentalities whose interest and principal payments are neither guaranteed by the U.S. Treasury nor backed by the full faith and credit of the U.S. government. These agencies and instrumentalities include, among others, the Federal Home Loan Banks, the Federal National Mortgage Association, and the Federal Home Loan Mortgage Corporation.
The Portfolio is subject to industry concentration risk, which is the chance that there will be overall problems affecting a particular industry. Because the Portfolio invests more than 25% of its assets in securities issued by companies in the financial services industry, the Portfolio's performance depends to a greater extent on the overall condition of that industry and is more susceptible to events affecting that industry.
More than 25% of the Portfolio’s assets are invested in instruments issued by companies in the financial services industry. The Portfolio considers the financial services industry to include issuers principally engaged in providing financial services to consumers and industry, such as securities issued by government-sponsored enterprises, including the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, the Federal Home Loan Banks, and the Federal Farm Credit Banks Funding Corporation; U.S. and foreign banks; insurance companies; real estate-related companies (i.e., companies having at least 50% of their assets, revenues, or net income related
9

to, or derived from, the real estate industry); securities firms; and leasing companies, among others. Because of this concentration, changes in economic, regulatory, and political conditions that affect financial services issuers could have a significant effect on the Portfolio. These conditions include changes in interest rates and defaults in payments by borrowers.


The market values of U.S. government and agency securities and U.S. Treasury securities are subject to fluctuation and the expectation that the U.S. Treasury will be able to honor its obligations.
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.
The Portfolio is subject to credit risk, which is the chance that the issuer of a security 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 security to decline. Credit risk should be very low for the Portfolio because it invests primarily in securities that are considered to be of high quality.
Because some of the securities included in the Portfolio are not backed by the full faith and credit of the U.S. government, the potential credit risk and yield for the Portfolio is higher than if it held only securities backed by the full faith and credit of the U.S. government.
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Under certain circumstances, the exposure to a single issuer could cause the Portfolio to fail to maintain a share price of $1.
Although the Portfolio invests in high-quality money market instruments, the Portfolio is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other agency of the U.S. government.
The Portfolio reserves the right to invest in repurchase agreements, which are subject to specific risks.
Plain Talk About Repurchase Agreements
Repurchase agreements are contracts in which a bank, securities dealer, or
other counterparty that meets minimum credit requirements sells
government securities and agrees to repurchase the securities on a specific
date (normally the next business day) at a specific price.
Repurchase agreements carry several risks. For instance, if the seller is unable to repurchase the securities as promised, the Portfolio 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 the Portfolio and order that the securities be used to pay off the seller’s debts. The Portfolio's advisor believes that these risks can be controlled through careful security and counterparty selection and monitoring.
The Portfolio reserves the right to invest, to a limited extent, in adjustable-rate securities, which are a type of derivative.
An adjustable-rate security’s interest rate, as the name implies, is not set; instead, it fluctuates periodically. Generally, the security’s yield is based on a U.S. dollar-based interest rate benchmark such as the federal funds rate, the 90-day U.S. Treasury bill rate, or another reference rate. Adjustable-rate securities reset their yields on a periodic basis (e.g., daily, weekly, or quarterly) or upon a change in the benchmark interest rate. These yields are closely correlated to changes in money market interest rates.
The Portfolio will not use derivatives for speculation or for the purpose of leveraging (magnifying) investment returns.
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Plain Talk About Derivatives
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 money market
benchmark (such as U.S. Treasury bill rates or the federal funds effective
rate), a physical asset (such as gold, oil, or wheat), a market index, or a
reference rate.
In addition, the Portfolio may invest up to 5% of its net assets in illiquid securities. These are securities that the Portfolio may not be able to sell or dispose of in the ordinary course of business within seven calendar days at approximately the value ascribed to it by the Portfolio.
Plain Talk About Weighted Average Maturity and Weighted Average
Life
A money market fund will maintain a dollar-weighted average maturity
(WAM) of 60 days or less and a dollar-weighted average life (WAL) of 120
days or less. For purposes of calculating a fund’s WAM, the maturity of
certain longer-term adjustable-rate securities held in the portfolio will
generally be the period remaining until the next interest rate adjustment.
When calculating its WAL, the maturity for these adjustable-rate securities
will generally be the final maturity date—the date on which principal is
expected to be returned in full. Maintaining a WAL of 120 days or less limits
a fund’s ability to invest in longer-term adjustable-rate securities, which are
generally more sensitive to changes in interest rates, particularly in
volatile markets.
Cash Management
The Portfolio'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 Portfolio bears its proportionate share of the expenses of the CMT Fund in which it invests. Vanguard receives no additional revenue from Portfolio assets invested in a CMT Fund.
Frequent Trading or Market-Timing
Vanguard anticipates that investors will purchase and sell shares of money market funds frequently because these funds are designed to offer investors a liquid investment. For this reason, the Board has determined that it is not
12

necessary to adopt policies and procedures designed to detect and deter frequent trading and market-timing in the money market fund shares. For information on frequent-trading limits of other Vanguard funds, please see the appropriate fund’s prospectus.
See the accompanying prospectus for the annuity or insurance program through which Portfolio shares are offered for further details on transaction policies.
The Portfolio and Vanguard
The Portfolio 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.
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.
Vanguard and the Board have voluntarily agreed to temporarily limit certain net operating expenses in excess of the Money Market Portfolio’s daily yield so as to maintain a zero or positive yield for the Portfolio. Vanguard and the Board may terminate the temporary expense limitation at any time.
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, provides investment advisory services to the Portfolio through its Fixed Income Group pursuant to the Funds' Service Agreement and
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subject to the supervision and oversight of the trustees and officers of Vanguard Variable Insurance Funds. As of December 31, 2022, Vanguard served as advisor for approximately $6 trillion in assets.
For the fiscal year ended December 31, 2022, the Portfolio’s advisory expenses represented an effective annual rate of less than 0.01% of the Portfolio’s average net assets.
Under the terms of an SEC exemption, the board of trustees of Vanguard Variable Insurance Funds 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 Portfolio’s advisory arrangements will be communicated to shareholders in writing. As the Portfolio’s sponsor and overall manager, Vanguard may provide investment advisory services to the Portfolio 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. Vanguard Variable Insurance Funds 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 Portfolio may rely on the new SEC relief.
For a discussion of why the Board approved the Portfolio's investment advisory arrangement, see the most recent semiannual report to shareholders covering the fiscal period ended June 30.
The manager primarily responsible for the day-to-day management of the Portfolio is:
John C. Lanius, Portfolio Manager at Vanguard. He has been with Vanguard since 1996, has worked in investment management since 1997, has managed investment portfolios since 2004, and has managed the Money Market Portfolio since 2006. Education: B.A., Middlebury College.
The Portfolio's Statement of Additional Information provides information about the portfolio manager’s compensation, other accounts under management, and ownership of shares of the Portfolio.
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Taxes
The Portfolio normally distributes its net investment income and net realized short-term or long-term capital gains, if any, to its shareholders, which are the insurance company separate accounts that fund your variable annuity or variable life insurance contract. The tax consequences to you of your investment in the Portfolio depend on the provisions of the annuity or life insurance contract through which you invest; please refer to the prospectus of such contract for more information.
The Portfolio intends to operate in such a manner that a separate account investing only in Portfolio shares will result in the variable annuity and variable life insurance contracts supported by that account receiving favorable tax treatment. This favorable treatment means that you generally will not be taxed on Portfolio distributions or proceeds on dispositions of Portfolio shares received by the separate account funding your contract. In order to qualify for this favorable treatment, the insurance company separate accounts that invest in the Portfolio must satisfy certain requirements. If a Portfolio funding your contract does not meet such requirements, your contract could lose its favorable tax treatment and income and gain allocable to your contract could be taxable to you. Also, if the IRS were to determine that contract holders have an impermissible level of control over the investments funding their contracts, your contract could lose its favorable tax treatment and income and gain allocable to your contract could be taxable currently to you. Please see the Portfolio’s Statement of Additional Information for more information.
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. The NAV per share is computed by dividing the total assets, minus liabilities, of the Portfolio by the number of Portfolio shares outstanding. On U.S. holidays or other days when the NYSE is closed, the NAV is not calculated, and the Portfolio does not sell or redeem shares. However, on those days the value
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of the Portfolio’s assets may be affected to the extent that the Portfolio holds securities that change in value on those days (such as foreign securities that trade on foreign markets that are open).
The instruments held by the Money Market Portfolio are generally valued on the basis of amortized cost. The values of any foreign securities held by a portfolio 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 portfolio are based on the NAVs of the shares. The values of any ETF shares or closed-end fund shares held by a portfolio are based on the market value of the shares.
Although the Vanguard retail and government money market funds seek to maintain a stable NAV of $1 per share, a stable share price is not guaranteed. A low or negative interest rate environment could impact a fund’s ability to provide a positive yield to its shareholders, pay expenses out of current income, and/or achieve its investment objective, including maintaining a stable NAV of $1 per share.
The Portfolio has authorized certain financial intermediaries and their designees, and may, from time to time, authorize certain fund 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 Portfolio 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 Portfolio after such acceptance.


The Portfolio’s NAV is used to determine the unit value for the annuity or life insurance program through which you invest. For more information on unit values, please refer to the accompanying prospectus of the insurance company that offers your annuity or life insurance program.
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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.
Yields and total returns presented for the Portfolio are net of the Portfolio's operating expenses, but they do not take into account charges and expenses attributable to the annuity or life insurance program through which you invest. The expenses of the annuity or life insurance program reduce the returns and yields you ultimately receive, so you should bear those expenses in mind when evaluating the performance of the Portfolio and when comparing the yields and returns of the Portfolio with those of other mutual funds.
Vanguard Money Market Portfolio
Year Ended December 31,
For a Share Outstanding Throughout Each Period
2022
2021
2020
2019
2018
Net Asset Value, Beginning of Period
$1.00
$1.00
$1.00
$1.00
$1.00
Investment Operations
 
 
 
 
 
Net Investment Income1
.0154
.0001
.005
.022
.020
Net Realized and Unrealized Gain (Loss) on Investments
(.0004)
Total from Investment Operations
.0150
.0001
.005
.022
.020
Distributions
 
 
 
 
 
Dividends from Net Investment Income
(.0150)
(.0001)
(.005)
(.022)
(.020)
Distributions from Realized Capital Gains
(.0000)2
Total Distributions
(.0150)
(.0001)
(.005)
(.022)
(.020)
Net Asset Value, End of Period
$1.00
$1.00
$1.00
$1.00
$1.00
Total Return
1.51%
0.02%
0.52%
2.26%
1.97%
Ratios/Supplemental Data
 
 
 
 
 
Net Assets, End of Period (Millions)
$1,217
$1,106
$1,301
$1,243
$1,218
Ratio of Expenses to Average Net Assets3
0.14%4
0.07%
0.15%
0.15%
0.15%
Ratio of Net Investment Income to Average Net Assets
1.54%
0.01%
0.49%
2.23%
1.97%
 
 
1
Calculated based on average shares outstanding.
2
Distribution was less than $0.0001 per share.
3
Vanguard and the board of trustees have agreed to temporarily limit certain net operating expenses in excess of the
portfolio’s daily yield in order to maintain a zero or positive yield for the portfolio. Vanguard and the board of
trustees may terminate the temporary expense limitation at any time. The portfolio is not obligated to repay this
amount to Vanguard. The ratio of total expenses to average net assets before an expense reduction was 0.15% for
2022, 0.15% for 2021 and 0.15% for 2020. For the years ended December 31, 2019 and 2018, there were no
expense reductions.
4
The ratio of expenses to average net assets for the period net of reduction from custody fee offset arrangements
was 0.14%.
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General Information
This Portfolio of Vanguard Variable Insurance Funds offers its shares to insurance companies to fund both annuity and life insurance contracts. Because of differences in tax treatment or other considerations, the best interests of various contract owners participating in the Portfolio might at some time be in conflict. The Board will monitor for any material conflicts and determine what action, if any, should be taken.
If the Board determines that continued offering of shares would be detrimental to the best interests of the Portfolio’s shareholders, the Portfolio may suspend the offering of shares for a period of time. If the Board determines that a specific purchase acceptance would be detrimental to the best interests of the Portfolio’s shareholders (for example, because of the size of the purchase request or a history of frequent trading by the investor), the Portfolio may reject such a purchase request.
If you wish to redeem money from the Portfolio, please refer to the instructions provided in the accompanying prospectus for the annuity or life insurance program. Shares of the Portfolio may be redeemed on any business day that the NYSE is open for trading. The redemption price of shares will be at the next-determined NAV per share. Redemption proceeds generally will be wired to the administrator within one business day following receipt of the redemption request, but no later than seven business days. Contract owners will receive their redemption checks from the administrator.
Under normal circumstances, the Portfolio typically expects to meet redemptions with positive cash flows. When this is not an option, the Portfolio seeks to maintain its risk exposure by selling a cross section of the Portfolio’s holdings to meet redemptions, while also factoring in transaction costs. Additionally, the Portfolio may work with the insurance companies through which contract owners participate in the Portfolio to implement redemptions in a manner that is least disruptive to the portfolio.
Under certain circumstances, including under stressed market conditions, there are additional tools that the Portfolio 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 Portfolio may also suspend payment of redemption proceeds for up to seven days. Additionally, under these unusual circumstances, the Portfolio may borrow money (subject to certain regulatory conditions and if available under
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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.
The Portfolio may suspend the redemption right or postpone payment at times when the NYSE is closed or during any emergency circumstances, as determined by the SEC. In connection with a determination by the Board, in accordance with Rule 22e-3 under the Investment Company Act of 1940, a money market fund may suspend redemptions and postpone payment of redemption proceeds in order to facilitate an orderly liquidation of the fund.
The exchange privilege (your ability to redeem shares from one Portfolio to purchase shares of another Portfolio) may be available to you through your contract. Although we make every effort to maintain the exchange privilege, Vanguard reserves the right to revise or terminate this privilege, limit the amount of an exchange, or reject any exchange, at any time, without notice.
The Portfolio may pay redemption proceeds, in whole or in part, by an in-kind distribution of readily marketable securities if Vanguard determines that it would be detrimental to the best interests of the Portfolio's remaining shareholders to pay redemption proceeds in cash.
For certain categories of investors, the Portfolio has authorized one or more brokers to accept on its behalf purchase and redemption orders. The brokers are authorized to designate other intermediaries to accept purchase and redemption orders on the Portfolio’s behalf. The Portfolio will be deemed to have received a purchase or redemption order when an authorized broker, or a broker’s authorized designee, accepts the order in accordance with the Portfolio’s instructions. In most cases, for these categories of investors, a contract owner’s properly transmitted order will be priced at the Portfolio’s next-determined NAV after the order is accepted by the authorized broker or the broker’s designee. The contract owner should review the authorized broker’s policies relating to trading in the Vanguard funds.
Please consult the Portfolio’s Statement of Additional Information or our website for a description of the policies and procedures that govern disclosure of the Portfolio's portfolio holdings.
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The Portfolio'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.
Shareholder Rights
The Portfolio's Agreement and Declaration of Trust, as amended, requires a shareholder bringing a derivative action on behalf of Vanguard Variable Insurance 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.
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Glossary of Investment Terms
Cash Equivalent Investments. Cash deposits, short-term bank deposits, and money market instruments that include U.S. Treasury bills and notes, bank certificates of deposit (CDs), repurchase agreements, commercial paper, and banker’s acceptances.
Dividend Distributions. Payments to portfolio shareholders of income from interest or dividends generated by a portfolio's investments.
Expense Ratio. A portfolio's total annual operating expenses expressed as a percentage of the portfolio'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.
FTSE 3-Month U.S. Treasury Bill Index. An index that measures the performance of short-term U.S. government debt securities and accrues income on a monthly basis.
Inception Date. The date on which the assets of a portfolio are first invested in accordance with the portfolio's investment objective. For portfolios with a subscription period, the inception date is the day after that period ends. Investment performance is generally measured from the inception date.
Joint Committed Credit Facility. The Portfolio 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 Portfolio's board of trustees and renegotiation with the lender syndicate on an annual basis.
Money Market Instruments. Short-term, liquid investments (usually with a maturity of 397 days or less) that include U.S. Treasury bills and notes, agency securities, bank certificates of deposit (CDs), repurchase agreements, commercial paper, and banker’s acceptances.
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.
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Principal. The face value of a debt instrument or the amount of money put into an investment.
Securities. Stocks, bonds, money market instruments, and other investments.
Stable Net Asset Value (NAV). A share price that maintains a consistent value (e.g., $1.00 or $100.00) using special pricing and valuation conventions.
Total Return. A percentage change, over a specified time period, in a portfolio's net asset value, assuming the reinvestment of all distributions of dividends and capital gains.
Variable Insurance Money Market Funds Average. The average performance of open-end investment companies classified as variable annuity funds by Lipper that invest in high-quality financial instruments rated in the top two grades with dollar-weighted average maturities of less than 90 days. These funds intend to keep constant net asset value.
Volatility. The fluctuations in value of a mutual fund or other security. The greater a portfolio'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 Variable Insurance Funds Money Market Portfolio, the following documents are available free upon request:
Annual/Semiannual Reports to Shareholders
Additional information about the Portfolio's investments is available in the Portfolio's annual and semiannual reports to shareholders.
Statement of Additional Information (SAI)
The SAI provides more detailed information about the Portfolio 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 reports or the SAI, or to request additional information about the Portfolio or other Vanguard funds, please visit vanguard.com or contact us as follows:
Telephone: 800-522-5555; Text telephone for people with hearing impairment: 800-749-7273
Information Provided by the SEC
Reports and other information about the Portfolio 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].
Portfolio's Investment Company Act file number: 811-05962
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Vanguard Marketing Corporation, Distributor.
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