VSPMX Vanguard S&P Mid-Cap 400 Index Fund Institutional Shares

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Vanguard average mutual fund expense ratio: 0.09%. Industry average mutual fund expense ratio: 0.50%. All averages are asset-weighted. Industry average excludes Vanguard. Sources: Vanguard and Morningstar, Inc., as of December 31, 2023.

Total returns: Short-term total return information is provided only as a service. Historical performance—particularly short-term performance—is no guarantee of future returns. Price, yield, and return on an actual investment will fluctuate, and you may have a gain or loss when you sell. Average annual returns include changes in price and reinvestments of dividends and capital gains. Since-inception returns for less than 1 year and year-to-date returns aren't annualized. Index performance is provided as a benchmark but isn't illustrative of any particular investment. You can't invest in an index.

Standardized returns: To see quarterly fee-adjusted returns, refer to the Price & Performance details.

Expense ratios: Expense ratios are displayed on Overview. For investments that are less than 1 fiscal year old, expense ratios are estimated.

Risk: All investing is subject to risk, including the possible loss of the money you invest. Funds that concentrate on a relatively narrow market sector face the risk of higher share-price volatility. Investments in stocks or bonds issued by non-U.S. companies are subject to risks including country/regional risk and currency risk.

An investment in the fund could lose money over short or even long periods. You should expect the fund’s share price and total return to fluctuate within a wide range, like the fluctuations of the overall stock market. The fund’s performance could be hurt by:

• Stock market risk: The chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising stock prices and periods of falling stock prices. The fund’s target index may, at times, become focused in stocks of a particular sector, category, or group of companies. Because the fund seeks to track its target index, the fund may underperform the overall stock market.
• Investment style risk: The chance that returns from mid-capitalization stocks will trail returns from the overall stock market. Historically, mid-cap stocks have been more volatile in price than the large-cap stocks that dominate the overall market, and they often perform quite differently. Mid-cap stocks tend to have greater volatility than large-cap stocks because, among other things, medium-size companies are more sensitive to changing economic conditions.
• Index replicating risk, which is the chance that the fund may be prevented from holding one or more securities in the same proportion as in its target index.
• Index-related risks: The fund is subject to risks associated with index investing, which include passive management risk, tracking error risk, and index provider risk. Passive management risk is the chance that the fund's use of an indexing strategy will negatively impact the fund's performance. Because the fund seeks to track the performance of its target index regardless of how that index is performing, the fund's performance may be lower than it would be if the fund were actively managed. Tracking error risk is the chance that the fund's performance will deviate from the performance of its target index. Tracking error risk may be heightened during times of increased market volatility or under other unusual market conditions. Index provider risk is the chance that the fund will be negatively impacted by changes or errors made by the index provider. Any gains, losses, or costs associated with or resulting from an error made by the index provider will generally be borne by the fund and, as a result, the fund's shareholders.