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Vanguard Short-Term Investment-Grade Fund

Summary Prospectus

May 30, 2012

Investor Shares & Admiral™ Shares

Vanguard Short-Term Investment-Grade Fund Investor Shares (VFSTX)

Vanguard Short-Term Investment-Grade Fund Admiral Shares (VFSUX)

The Fund’s statutory Prospectus and Statement of Additional Information dated

May 30, 2012, 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 get this information at no

cost by calling 800-662-7447 or by sending an e-mail request to

online@vanguard.com.

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.

Investment Objective
The Fund seeks to provide current income while maintaining limited price volatility.

Fees and Expenses
The following table describes the fees and expenses you may pay if you buy and hold
Investor Shares or Admiral Shares of the Fund.

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 (for fund account balances below $10,000)	$20/year	$20/year

Annual Fund Operating Expenses
(Expenses that you pay each year as a percentage of the value of your investment)


	Investor Shares	Admiral Shares
Management Expenses	0.17%	0.08%
12b-1 Distribution Fee	None	None
Other Expenses	0.03%	0.03%
Total Annual Fund Operating Expenses	0.20%	0.11%

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 invest $10,000 in the Fund’s shares. These examples assume that the
Shares provide a return of 5% a year and that total annual fund operating expenses
remain as stated in the preceding table. The results apply whether or not you 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	$11	$35	$62	$141

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 47%.

Primary Investment Strategies
The Fund invests in a variety of high-quality and, to a lesser extent, medium-quality
fixed income securities, at least 80% of which will be short- and intermediate-term
investment-grade securities. High-quality fixed income securities are those rated the
equivalent of A3 or better by Moody‘s Investors Service, Inc., or another independent
rating agency or, if unrated, are determined to be of comparable quality by the 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 advisor. (Investment-grade fixed
income securities are those rated the equivalent of Baa3 and above by Moody‘s.) The
Fund is expected to maintain a dollar-weighted average maturity of 1 to 4 years.

Primary Risks
The Fund is designed for investors with a low tolerance for risk, but you could still lose
money by investing in it. The Fund’s performance could be hurt by:

• 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, so
investors should expect the Fund’s monthly income to fluctuate.

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

• Credit risk, which is the chance that a bond issuer will fail to pay interest and
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. Although the Fund
invests a limited portion of its assets in low-quality bonds, credit risk should be low for
the Fund because it invests mainly in bonds that are considered high-quality and, to a
lesser extent, in bonds that are considered medium-quality.

• 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.

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.

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 Short-Term Investment-Grade Fund Investor Shares¹

1 The year-to-date return as of the most recent calendar quarter, which ended on March 31, 2012, was 1.58%.

During the periods shown in the bar chart, the highest return for a calendar quarter
was 6.02% (quarter ended June 30, 2009), and the lowest return for a quarter was
–3.42% (quarter ended September 30, 2008).


Average Annual Total Returns for Periods Ended December 31, 2011
	1 Year	5 Years	10 Years
Vanguard Short-Term Investment-Grade Fund Investor Shares
Return Before Taxes	1.93%	4.28%	4.01%
Return After Taxes on Distributions	0.87	2.83	2.51
Return After Taxes on Distributions and Sale of Fund Shares	1.30	2.80	2.53
Vanguard Short-Term Investment-Grade Fund Admiral Shares
Return Before Taxes	2.02%	4.39%	4.11%
Barclays Capital U.S. 1-5 Year Credit Bond Index
(reflects no deduction for fees, expenses, or taxes)	3.04%	5.29%	4.90%

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 will 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.

Portfolio Manager

Gregory S. Nassour, CFA, Principal of Vanguard. He has managed the Fund since 2008.

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 1110, Valley Forge, PA 19482-1110), or by telephone
(800-662-2739). The following table provides the Fund’s minimum initial and subsequent
investment requirements.


Account Minimums	Investor Shares	Admiral Shares
To open and maintain an account	$3,000	$50,000
To add to an existing account	Generally $100 (other than	Generally $100 (other than
	by Automatic Investment	by Automatic Investment
	Plan, which has no	Plan, which has no
	established minimum)	established minimum)

Tax Information
The Fund’s distributions may be taxable as ordinary income or capital gain.

Payments to Financial Intermediaries
The Fund and its investment advisor do not pay financial intermediaries for sales of
Fund shares.

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Vanguard Short-Term Investment-Grade Fund Investor Shares—Fund Number 39
Vanguard Short-Term Investment-Grade Fund Admiral Shares—Fund Number 539

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SP 39 052012