Dreyfus Inflation Adjusted Securities Fund
	Summary Prospectus July 20, 2012
		ClassTicker InstitutionalDIASX InvestorDIAVX

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, including the statement of additional information and most recent reports to shareholders, online at www.dreyfus.com/funddocuments. You can also get this information at no cost by calling 1-800-DREYFUS (inside the U.S. only) or by sending an e-mail request to info@dreyfus.com. The fund's prospectus and statement of additional information, dated December 1, 2011 (each as revised or supplemented), are incorporated by reference into this summary prospectus.

Investment Objective

The fund seeks returns that exceed the rate of inflation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
	Institutional Shares	Investor Shares
Management fees	0.30%	0.30%
Other expenses (including shareholder services fees)	0.10%	0.43%
Total annual fund operating expenses	0.40%	0.73%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. 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
Institutional Shares	$41	$128	$224	$505
Investor Shares	$75	$233	$406	$906

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 may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 138.50% of the average value of its portfolio.

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Principal Investment Strategy

To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in inflation-indexed securities. These are fixed-income securities designed to protect investors from a loss of value due to inflation by periodically adjusting their principal and/or coupon according to the rate of inflation. The inflation-indexed securities issued by the U.S. Treasury and some foreign government issuers, for example, accrue inflation into the principal value of the bond. Other issuers may pay out the Consumer Price Index accruals as part of a semi-annual coupon.

The fund primarily invests in high quality, U.S. dollar-denominated, inflation-indexed securities. To a limited extent, the fund may invest in foreign currency-denominated, inflation-protected securities and other fixed-income securities not adjusted for inflation which are rated investment grade or the unrated equivalent as determined by The Dreyfus Corporation. Such other fixed-income securities may include: U.S. government bonds and notes, corporate bonds, mortgage-related securities and asset-backed securities.

The fund seeks to keep the average effective duration of its portfolio at two to ten years. The fund may invest in securities with effective or final maturities of any length. The fund may adjust its portfolio holdings or average effective duration based on actual or anticipated changes in interest rates or credit quality.

Principal Risks

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Interest rate risk. Prices of bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's portfolio, the more the fund's share price is likely to react to interest rates.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a bond, can cause a bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance – in the rating agency's opinion – that the bond issuer will default or fail to meet its payment obligations. Securities issued by the U.S. Treasury or U.S. government agencies generally present minimal credit risk. However, a security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. The market prices for such securities are not guaranteed and will fluctuate.

·Inflation-indexed security risk. Interest payments on inflation-indexed securities can be unpredictable and will vary as the principal and/or interest is periodically adjusted based on the rate of inflation. If the index measuring inflation falls, the interest payable on these securities will be reduced. The U.S. Treasury has guaranteed that in the event of a drop in prices, it would repay the par amount of its inflation-indexed securities. Inflation-indexed securities issued by corporations generally do not guarantee repayment of principal. Any increase in the principal amount of an inflation-indexed security will be considered taxable ordinary income, even though investors do not receive their principal until maturity. As a result, the fund may be required to make annual distributions to shareholders that exceed the cash the fund received, which may cause the fund to liquidate certain investments when it is not advantageous to do so. Also, if the principal value of an inflation-indexed security is adjusted downward due to deflation, amounts previously distributed may be characterized in some circumstances as a return of capital.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities and the fund's share price may fall dramatically.

·Foreign investment risk. Special risks associated with investments in foreign issuers include exposure to currency fluctuations, less liquidity, less developed or less efficient trading markets, lack of comprehensive company information, political and economic instability and differing auditing and legal standards. Investments denominated in foreign currencies are subject to the risk that such currencies will decline in value relative to the U.S. dollar and affect the value of these investments held by the fund.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

Dreyfus Inflation Adjusted Securities Fund Summary 2

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is no guarantee of future results. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
	Best Quarter Q1, 2008: 5.33% Worst Quarter Q3, 2008: -3.41%
The year-to-date total return of the fund's Institutional shares as of 9/30/11 was 10.35%.

After-tax performance is shown only for Institutional shares. After-tax performance of the fund's other share classes, if any, will vary. After-tax returns are calculated using the historical highest individual federal marginal tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Average Annual Total Returns (as of 12/31/10)
Share Class	1 Year	5 Years	Since Inception 10/31/02
Institutional shares returns before taxes	5.88%	5.14%	5.67%
Institutional shares returns after taxes on distributions	4.96%	3.76%	3.80%
Institutional shares returns after taxes on distributions and sale of fund shares	3.83%	3.58%	3.74%
Investor shares returns before taxes	5.42%	4.85%	5.39%
Barclays Capital U.S. Treasury Inflation Protected Securities Index reflects no deduction for fees, expenses or taxes	6.31%	5.33%	6.08%

Portfolio Management

The investment adviser for the fund is The Dreyfus Corporation. Investment decisions for the fund are made by a team of portfolio managers from Standish Mellon Asset Management Company LLC (Standish), an affiliate of The Dreyfus Corporation. The team members are Robert Bayston, David Horsfall, CFA, and Nate Pearson, CFA, each of whom also is an employee of The Dreyfus Corporation. The fund has been team managed since April 2011. Mr. Bayston has been a primary portfolio manager of the fund since January 2005 and is responsible for treasury inflation protected securities and derivative strategies with Standish. Mr. Horsfall has been a primary portfolio manager of the fund since April 2011 and is deputy chief investment officer and a senior portfolio manager at Standish. Mr. Pearson has been a primary portfolio manager of the fund since July 2012 and is an interest rate and derivatives strategist responsible for researching U.S. Government securities at Standish. There are no limitations on the role of a team member with respect to investment decisions for the fund.

Purchase and Sale of Fund Shares

In general, the fund's minimum initial investment is $10,000 with respect to Investor shares and $1,000 with respect to Institutional shares (the minimum initial investment in Institutional shares for foundations and endowments is $1,000,000), and the minimum subsequent investment is $100 with respect to Investor shares and Institutional shares. You may sell (redeem) your shares on any business day by calling 1-800-DREYFUS (inside the U.S. only) or by visiting www.dreyfus.com. If you invested in the fund through a third party, such as a bank, broker-dealer or financial advisor, or in a 401(k) or other retirement plan, you may

Dreyfus Inflation Adjusted Securities Fund Summary 3

mail your request to sell shares to Dreyfus Institutional Department, P.O. Box 9882, Providence, Rhode Island 02940-8082. If you invested directly through the fund, you may mail your request to sell shares to Dreyfus Shareholder Services, P.O. Box 9879, Providence, Rhode Island 02940-8079.

Tax Information

The fund's distributions are taxable as ordinary income or capital gains, except when your investment is through an IRA, 401(k) plan or other tax-advantaged investment plan (in which case you may be taxed upon withdrawal of your investment from such account).

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares through a broker-dealer or other financial intermediary (such as a bank), the fund and its related companies may pay the intermediary for the sale of fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

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