VYM Vanguard High Dividend Yield

Vanguard Emerging Markets Government Bond Index Fund Summary Prospectus

February 27, 2020

Institutional Shares

Vanguard Emerging Markets Government Bond Index Fund Institutional Shares (VGIVX)

The Fund's statutory Prospectus and Statement of Additional Information dated February 27, 2020, as may be amended or supplemented, are incorporated into and made part of this Summary Prospectus by reference.

Before you invest, you may want to review the Fund's Prospectus, which contains more information about the Fund and its risks. You can find the Fund's Prospectus and other information about the Fund online at www.vanguard.com/prospectus. You can also obtain this information at no cost by calling 800-662-7447 (if you are an individual investor) or 888-809-8102 (if you are a client of Vanguard's Institutional Division) or by sending an email request to online@vanguard.com.

See the inside front cover for important information about access to your fund's annual and semiannual shareholder reports.

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.

Important information about access to shareholder reports

Beginning on January 1, 2021, as permitted by regulations adopted by the SEC, paper copies of your fund's annual and semiannual shareholder reports will no longer be sent to you by mail, unless you specifically request them. Instead, you will be notified by mail each time a report is posted on the website and will be provided with a link to access the report.

If you have already elected to receive shareholder reports electronically, you will not be affected by this change and do not need to take any action. You may elect to receive shareholder reports and other communications from the fund electronically by contacting your financial intermediary (such as a broker-dealer or bank) or, if you invest directly with the fund, by calling Vanguard at one of the phone numbers on the back cover of this prospectus or by logging on to vanguard.com.

You may elect to receive paper copies of all future shareholder reports free of charge. If you invest through a financial intermediary, you can contact the intermediary to request that you continue to receive paper copies. If you invest directly with the fund, you can call Vanguard at one of the phone numbers on the back cover of this prospectus or log on to vanguard.com. Your election to receive paper copies will apply to all the funds you hold through an intermediary or directly with Vanguard.

1

2

limited to 48%. If the Index, as constituted based on market weights, exceeds the 20% or 48% limits, the excess is reallocated to bonds of other issuers represented in the Index.

The Fund invests by sampling the Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Index in terms of key risk factors and other characteristics. All of the Fund's investments will be selected through the sampling process, and under normal circumstances at least 80% of the Fund's assets will be invested in bonds included in the Index. The Fund maintains a dollar-weighted average maturity consistent with that of the Index, which generally ranges between 10 and 15 years. As of October 31, 2019, the dollar-weighted average maturity of the Index was 12.6 years.

3

the Fund because it invests a large portion of its assets in bonds rated below investment-grade (also known as high-yield or junk bonds).

•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.

•Interest rate risk, which is the chance that bond prices will decline because of rising interest rates. Interest rate risk should be moderate for the Fund because it invests primarily in short- and intermediate-term bonds, whose prices are less sensitive to interest rate changes than are the prices of long-term bonds.

•Income risk, which is the chance that the Fund's income will decline because of falling interest rates. Income risk should be moderate for the Fund, so investors should expect the Fund's monthly income to fluctuate accordingly.

•Index sampling risk, which is the chance that the securities selected for the Fund, in the aggregate, will not provide investment performance matching that of the Fund's target index. Index sampling risk for the Fund is expected to be low.

•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. Call risk should be low for the Fund.

•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.

A Note on Risk: Many investors invest in bonds and bond funds in an attempt to lower the overall risk of their portfolios. This strategy makes sense when the bonds owned are U.S. bonds because U.S. bond returns typically are not highly correlated with, and are far less volatile than, stock returns. The strategy is less likely to be effective, however, when the bonds owned are emerging market bonds. Returns of emerging market bonds, even dollar-denominated bonds like those owned by the Fund, can be quite volatile and tend to correlate more closely with U.S. and foreign stock returns than with U.S. bond returns. Consequently, if your goal is to lower risk and volatility, this Fund may not be an appropriate investment.

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.

4

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 Institutional Shares (including annual fund operating expenses but excluding shareholder fees) has varied from one calendar year to another over the periods shown. If applicable shareholder fees were reflected, returns would be less than those shown in the bar chart. The table shows how the average annual total returns of the Institutional Shares (including annual fund operating expenses and any applicable shareholder fees) compare with those of the Fund's target 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.

0% -2.80

-20%

-40%

During the periods shown in the bar chart, the highest return for a calendar quarter was 5.60% (quarter ended March 31, 2019), and the lowest return for a quarter was –3.33% (quarter ended December 31, 2016).

5

(BISL) (collectively, Bloomberg), or Bloomberg's licensors, own all proprietary rights in the Bloomberg Barclays USD Emerging Markets Government RIC Capped Index (the Index or Bloomberg Barclays Index).

Neither Barclays Bank Plc, Barclays Capital Inc., or any affiliate (collectively Barclays) or Bloomberg is the issuer or producer of the Emerging Markets Government Bond Index Fund and neither Bloomberg nor Barclays has any responsibilities, obligations or duties to investors in the Emerging Markets Government Bond Index Fund. The Index is licensed for use by The Vanguard Group, Inc. (Vanguard) as the sponsor of the Emerging Markets Government Bond Index Fund. Bloomberg and Barclays' only relationship with Vanguard in respect to the Index is the licensing of the Index, which is determined, composed and calculated by BISL, or any successor thereto, without regard to the Issuer or the Emerging Markets Government Bond Index Fund or the owners of the Emerging Markets Government Bond Index Fund.

Additionally, Vanguard may for itself execute transaction(s) with Barclays in or relating to the Index in connection with the Emerging Markets Government Bond Index Fund. Investors acquire the Emerging Markets Government Bond Index Fund from Vanguard and investors neither acquire any interest in the Index nor enter into any relationship of any kind whatsoever with Bloomberg or Barclays upon making an investment in the Emerging Markets Government Bond Index Fund. The Emerging Markets Government Bond Index Fund is not sponsored, endorsed, sold or promoted by Bloomberg or Barclays. Neither Bloomberg nor Barclays makes any representation or warranty, express or implied regarding the advisability of investing in the Emerging Markets Government Bond Index Fund or the advisability of investing in securities generally or the ability of the Index to track corresponding or relative market performance. Neither Bloomberg nor Barclays has passed on the legality or suitability of the Emerging Markets Government Bond Index Fund with respect to any person or entity. Neither Bloomberg nor Barclays is responsible for and has not participated in the determination of the timing of, prices at, or quantities of the Emerging Markets Government Bond Index Fund to be issued. Neither Bloomberg nor Barclays has any obligation to take the needs of the Issuer or the owners of the Emerging Markets Government Bond Index Fund or any other third party into consideration in determining, composing or calculating the Index. Neither Bloomberg nor Barclays has any obligation or liability in connection with administration, marketing or trading of the Emerging Markets Government Bond Index Fund.

The licensing agreement between Bloomberg and Barclays is solely for the benefit of Bloomberg and Barclays and not for the benefit of the owners of the Emerging Markets Government Bond Index Fund, investors or other third parties. In addition, the licensing agreement between Vanguard and Bloomberg is solely for the benefit of Vanguard and Bloomberg and not for the benefit of the owners of the Emerging Markets Government Bond Index Fund, investors or other third parties.

NEITHER BLOOMBERG NOR BARCLAYS SHALL HAVE ANY LIABILITY TO THE ISSUER, INVESTORS OR TO OTHER THIRD PARTIES FOR THE QUALITY, ACCURACY AND/OR COMPLETENESS OF THE BLOOMBERG BARCLAYS INDEX OR ANY DATA INCLUDED THEREIN OR FOR INTERRUPTIONS IN THE DELIVERY OF THE BLOOMBERG BARCLAYS INDEX. NEITHER BLOOMBERG NOR BARCLAYS MAKES ANY WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY THE ISSUER, THE INVESTORS OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE BLOOMBERG BARCLAYS INDEX OR ANY DATA INCLUDED THEREIN. NEITHER BLOOMBERG NOR BARCLAYS MAKES ANY EXPRESS OR IMPLIED WARRANTIES, AND EACH HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE BLOOMBERG BARCLAYS INDEX OR ANY DATA INCLUDED THEREIN. BLOOMBERG RESERVES THE RIGHT TO CHANGE THE METHODS OF CALCULATION OR PUBLICATION, OR TO CEASE THE CALCULATION OR PUBLICATION OF THE BLOOMBERG BARCLAYS INDEX, AND NEITHER BLOOMBERG NOR BARCLAYS SHALL BE LIABLE FOR ANY MISCALCULATION OF OR ANY INCORRECT, DELAYED OR INTERRUPTED PUBLICATION WITH RESPECT TO THE BLOOMBERG BARCLAYS INDEX. NEITHER BLOOMBERG NOR BARCLAYS SHALL BE LIABLE FOR ANY DAMAGES, INCLUDING, WITHOUT LIMITATION, ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY LOST PROFITS AND EVEN IF ADVISED OF THE POSSIBILITY OF SUCH, RESULTING FROM THE USE OF A BLOOMBERG BARCLAYS INDEX OR ANY DATA INCLUDED THEREIN OR WITH RESPECT TO THE EMERGING MARKETS GOVERNMENT BOND INDEX FUND.

None of the information supplied by Bloomberg or Barclays and used in this publication may be reproduced in any manner without the prior written permission of both Bloomberg and Barclays Capital, the investment banking division of Barclays Bank Plc. Barclays Bank Plc is registered in England No. 1026167. Registered office 1 Churchill Place London E14 5HP.

To request additional information about the Fund, please visit vanguard.com or contact us at 800-662-7447 (if you are an individual investor) or 888-809-8102 (if you are a client of Vanguard's Institutional Division).

© 2020 The Vanguard Group, Inc. All rights reserved. Vanguard Marketing Corporation, Distributor.

SPI 2020 022020