497K 1 form.htm

Federated Intermediate Corporate Bond Fund

A Portfolio of Federated Income Securities Trust

Summary PROSPECTUS

June 30, 2011

INSTITUTIONAL SHARES (TICKER FIIFX)
INSTITUTIONAL SERVICE SHARES (TICKER INISX)
(Effective September 30, 2011, the Fund's Institutional Service Shares will be redesignated as Service Shares)

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 FederatedInvestors.com/prospectus. You can also get this information at no cost by calling 1-800-341-7400 or by sending an email request to services@federatedinvestors.com or from a financial intermediary through which Shares of the Fund may be bought or sold. The Fund's Prospectus and Statement of Additional Information, both dated June 30, 2011, are incorporated by reference into this Summary Prospectus.

A mutual fund seeking to provide current income by investing in a diversified portfolio of investment-grade, fixed-income securities.

As with all mutual funds, 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.

Fund Summary Information

Federated Intermediate Corporate Bond Fund (the “Fund”)

RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE

The Fund's investment objective is to provide current income.

RISK/RETURN SUMMARY: FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and hold the Fund's Institutional Shares (IS) or Institutional Service Shares (SS).

Shareholder Fees (fees paid directly from your investment)	IS	SS
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	None	None
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	None	None
Redemption Fee (as a percentage of amount redeemed, if applicable)	None	None
Exchange Fee	None	None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.50%	0.50%
Distribution (12b-1) Fee	None	0.25%
Other Expenses	0.50%	0.50%
Acquired Fund Fees and Expenses	0.01%	0.01%
Total Annual Fund Operating Expenses	1.01%	1.26%
Fee Waivers and/or Expense Reimbursements¹	0.44%	0.44%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	0.57%	0.82%

The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding Acquired Fund Fees and Expenses) paid by the Fund's IS and SS classes (after the voluntary waivers and/or reimbursements) will not exceed 0.56% and 0.81% (the “Fee Limit”), respectively, up to but not including the later of (the “Termination Date”): (a) July 1, 2012; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Fund's Board of Trustees.

Example

This 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 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 operating expenses are as shown in the table and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:

Share Class	1 Year	3 Years	5 Years	10 Years
IS	$103	$322	$558	$1,236
SS	$128	$400	$692	$1,523

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 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 22% of the average value of its portfolio.

RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE

What are the Fund's Main Investment Strategies?

The Fund invests in a diversified portfolio of investment-grade, fixed-income securities consisting primarily of corporate debt securities, U.S. government mortgage-backed securities, and U.S. Treasury and agency securities. The Fund's investment adviser (“Adviser”) seeks to enhance the Fund's performance by allocating relatively more of its portfolio to the security type that the Adviser expects to offer the best balance between current income and risk. Some of the corporate debt securities in which the Fund invests are considered to be “foreign securities,” as that term is defined in this Prospectus. The foreign securities in which the Fund invests will be predominately denominated in U.S. dollars. The Fund may invest in derivative contracts to implement its investment strategies as more fully described herein.

The Fund intends to invest in the securities of U.S. government-sponsored entities (GSEs), including GSE securities that are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation, the Federal National Mortgage Association and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in GSE securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage

Association. Finally, the Fund may invest in a few GSE securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. Such securities include those issued by the Farm Credit System and the Financing Corporation.

Although the value of the Fund's Shares will fluctuate, the Adviser will seek to manage the magnitude of fluctuation by limiting, under normal market conditions, the Fund's dollar-weighted average maturity to between three and ten years and dollar-weighted average duration to between three and seven years. Maturity reflects the time until a fixed-income security becomes payable. Duration measures the price sensitivity of a fixed-income security to changes in interest rates.

What are the Main Risks of Investing in the Fund?

All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include:

Interest Rate Risks. Prices of fixed-income securities generally fall when interest rates rise.
Credit Risks. There is a possibility that issuers of securities in which the Fund may invest may default in the payment of interest or principal on the securities when due, which would cause the Fund to lose money.
Call and Prepayment Risks. The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value. When homeowners prepay their mortgages in response to lower interest rates, the Fund will be required to reinvest the proceeds at the lower interest rates available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities.
Risks of Foreign Investing. Because the Fund invests in securities issued by foreign companies, the Fund's Share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.
Risks Associated with Complex CMOs. The Fund may invest a portion of its assets in securities rated below investment grade which may be subject to greater interest rate, credit and liquidity risks than investment-grade securities.
Risks of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund, and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks

described in this Prospectus or the Fund's Statement of Additional Information (SAI), such as interest rate, credit, currency, liquidity and leverage risks.
Liquidity Risks. The fixed-income securities in which the Fund invests may be less readily marketable and may be subject to greater fluctuation in price than other securities. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. If this happens, the Fund could incur losses.
Leverage Risks. Leverage risk is created when an investment exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain.

The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Performance: Bar Chart and Table

Risk/Return Bar Chart

The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns for each class averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the “Products” section at FederatedInvestors.com or by calling 1-800-341-7400.

The Fund's IS class total return for the three-month period from January 1, 2011 to March 31, 2011, was 1.62%.

Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 7.53% (quarter ended June 30, 2009). Its lowest quarterly return was (6.75)% (quarter ended September 30, 2008).

Average Annual Total Return Table

In addition to Return Before Taxes, Return After Taxes is shown for the Fund's IS class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for the IS class, and after-tax returns for the SS class will differ from those shown for the IS class. Actual after-tax returns depend on each investor's personal tax situation, and are likely to differ from those shown. After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account (IRA) or other tax-advantaged investment plan.

(For the Period Ended December 31, 2010)

Share Class	1 Year	5 Years	10 Years
IS:
Return Before Taxes	7.30%	5.28%	5.52%
Return After Taxes on Distributions	5.54%	3.46%	3.60%
Return After Taxes on Distributions and Sale of Fund Shares	4.72%	3.42%	3.57%
SS:
Return Before Taxes	7.04%	5.03%	5.26%
Barclays Capital U.S. Intermediate Credit Index¹ (reflects no deduction for fees, expenses or taxes)	7.76%	6.03%	6.22%
Lipper Intermediate Term Investment Grade Debt Funds Average²	8.62%	5.44%	5.55%

1	Barclays Capital U.S. Intermediate Credit Index is an unmanaged index that consists of dollar-denominated, investment-grade, publicly issued securities with a maturity of between one and ten years, a minimum amount outstanding of $250 million and that are issued by both corporate issuers and non-corporate issuers (supranationals, sovereigns, foreign agencies and foreign local governments).
2	Lipper figures represent the average of the total returns reported by all the mutual funds designated by Lipper, Inc. as falling into their respective categories indicated. They do not reflect sales charges.

FUND MANAGEMENT

The Fund's Investment Adviser (“Adviser”) is Federated Investment Management Company.

Joseph M. Balestrino, Senior Portfolio Manager, has been the Fund's portfolio manager since January 1994.

purchase and sale of fund shares

You may purchase, redeem or exchange Shares of the Fund on any day the New York Stock Exchange (NYSE) is open. Shares may be purchased through a financial intermediary or directly from the Fund, by wire or by check. Please note that certain purchase restrictions may apply. Redeem or exchange Shares through a financial intermediary or directly from the Fund by telephone at 1-800-341-7400 or by mail.

The minimum initial investment amount for the Fund's IS and SS classes is generally $1,000,000 and there is no required minimum subsequent investment amount.

Tax Information

The Fund's distributions are taxable as ordinary income or capital gains except when your investment is through a 401(k) plan, an Individual Retirement Account (IRA) or other tax-advantaged investment plan.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and/or 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.

Federated Intermediate Corporate Bond Fund
Federated Investors Funds
4000 Ericsson Drive
Warrendale, PA 15086-7561

Federated Securities Corp., Distributor

Investment Company Act File No. 811-4577

Cusip 31420C407
Cusip 31420C506

Q450307 (6/11)