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  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="USD">844</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="USD">627</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="USD">627</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="USD">493</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="USD">318</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="USD">1131</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="USD">1078</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="USD">1078</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="USD">779</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="USD">552</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="USD">1947</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="USD">2147</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="USD">2327</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="USD">1596</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="USD">1225</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.1308</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0673</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0193</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0589</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0499</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">-0.1027</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.2646</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.1095</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0598</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.1022</rr:AnnualReturn2012>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member">highest quarterly return</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.117</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member">lowest quarterly return</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">-0.0627</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0529</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0348</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0339</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="pure">0.039</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="pure">0.0828</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="pure">0.0817</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="pure">0.1054</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 id="Item_7" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberBarclayUsCreditIndex_Member" unitRef="pure">0.0937</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 id="Item_8" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberLipperCorporateDebtFunds_Member" unitRef="pure">0.0996</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0704</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0484</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0468</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="pure">0.0683</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="pure">0.0714</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="pure">0.0776</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="pure">0.0823</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 id="Item_9" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberBarclayUsCreditIndex_Member" unitRef="pure">0.0765</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 id="Item_10" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberLipperCorporateDebtFunds_Member" unitRef="pure">0.0729</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="pure">0.0674</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0458</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000009106_MemberC000024768_Member" unitRef="pure">0.0447</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024769_Member" unitRef="pure">0.0654</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024770_Member" unitRef="pure">0.0638</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="pure">0.0709</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000062220_Member" unitRef="pure">0.0733</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 id="Item_11" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberBarclayUsCreditIndex_Member" unitRef="pure">0.0623</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 id="Item_12" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberLipperCorporateDebtFunds_Member" unitRef="pure">0.0625</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">Fund Summary Information &lt;br/&gt;&lt;br/&gt;&lt;b&gt;Federated Bond Fund (the "Fund")&lt;/b&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The Fund's investment objective is to provide as high a level of current income as is consistent with the preservation of capital.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">This table describes the fees and expenses that you may pay if you buy and hold the Fund's Class A Shares (A), Class B Shares (B), Class C Shares (C), Class F Shares (F) and Institutional Shares (IS) of the Fund. You may qualify for certain sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 and $1,000,000 in certain classes (e.g., A class and F class, respectively) of Federated funds. More information about these and other discounts is available from your financial professional and in the "What Do Shares Cost?" section of the Prospectus on page 12.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;</rr:OperatingExpensesCaption>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Portfolio Turnover &lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">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 6% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Example &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;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. Expenses assuming no redemption are also shown. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE &lt;br/&gt;&lt;br/&gt;What are the Fund's Main Investment Strategies? &lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The Fund invests primarily in a diversified portfolio of investment-grade, fixed-income securities. The 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. The Fund may invest up to 35% of its assets in fixed-income securities rated below investment grade. The Adviser may lengthen or shorten duration from time to time based on its interest rate outlook, but the Fund has no set duration parameters. Duration measures the price sensitivity of a fixed-income security to changes in interest rates. The Fund may invest in derivative contracts or hybrid contracts (such as, for example, futures contracts, options contracts and swap contracts) to implement its investment strategies as more fully described herein.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests 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 ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") 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 government 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 ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;Because the Fund refers to fixed-income investments in its name, it will notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets in fixed-income investments.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">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:&lt;br/&gt;&lt;br/&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer durations.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Issuer Credit Risk.&lt;/b&gt; It is possible that interest or principal on securities will not be paid when due. Such non-payment or default may reduce the value of the Fund's portfolio holdings, its share price and its performance.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; 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.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Call Risk.&lt;/b&gt; An issuer may redeem a fixed-income security before maturity (a "call") at a price below its current market price. &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; 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. OTC derivative contracts generally carry greater liquidity risk than exchange-traded contracts.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Leverage Risk.&lt;/b&gt; 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.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Risk Associated with Noninvestment-Grade Securities.&lt;/b&gt; 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.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Risk Related to the Economy.&lt;/b&gt; Lower-grade bond returns are sensitive to changes in the economy. The value of the Fund's portfolio may decline in tandem with a drop in the overall value of the stock market based on negative developments in the U.S. and global economies.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; 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.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Risk of Investing in Derivative Contracts and Hybrid Instruments.&lt;/b&gt; 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.&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left: 20px"&gt;&lt;b&gt;Technology Risk.&lt;/b&gt; Proprietary and third-party data and systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.&lt;/li&gt;&lt;/ul&gt;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.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Performance: Bar Chart and Table &lt;br/&gt;&lt;br/&gt;Risk/Return Bar Chart&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">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 A class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns 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.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">Federated Bond Fund - A Class</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The total returns shown in the bar chart do not reflect the payment of any sales charges or recurring shareholder account fees. If these charges or fees had been included, the returns shown would have been lower. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's A class highest quarterly return was 11.70% (quarter ended June 30, 2009). Its lowest quarterly return was (6.27)% (quarter ended September 30, 2008).</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The Fund's IS class commenced operations on January 28, 2008. For the period prior to the commencement of operations of the IS class, the performance information shown below is for the A class. The performance of the A class has not been adjusted to reflect the expenses applicable to the IS class since the IS class has a lower expense ratio than the expense ratio of the A class. The performance of the A class has been adjusted to reflect the absence of sales charges and adjusted to remove any voluntary waiver of Fund expenses related to the A class that may have occurred during the period prior to the commencement of operations of the IS class.&lt;br/&gt;&lt;br/&gt;In addition to Return Before Taxes, Return After Taxes is shown for the Fund's A class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for A class, and after-tax returns for B, C, F and IS classes will differ from those shown for A 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 &lt;b&gt;federal&lt;/b&gt; income and capital gains tax rates. These after-tax returns do &lt;b&gt;not&lt;/b&gt; reflect the effect of any applicable &lt;b&gt;state&lt;/b&gt; and &lt;b&gt;local&lt;/b&gt; taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.&lt;br/&gt;&lt;br/&gt;(For the Period Ended December 31, 2012)</rr:PerformanceTableNarrativeTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">February 1, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000009106_Member" unitRef="pure">0.06</rr:PortfolioTurnoverRate>
  <rr:ExpenseBreakpointDiscounts contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">You may qualify for certain sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 and $1,000,000 in certain classes (e.g., A class and F class, respectively) of Federated funds.</rr:ExpenseBreakpointDiscounts>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">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.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The bar chart shows the variability of the Fund's A class total returns on a calendar year-by-year basis.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">1-800-341-7400</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">FederatedInvestors.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The stated returns assume the highest historical &lt;b&gt;federal&lt;/b&gt; income and capital gains tax rates.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">After-tax returns are shown only for A class, and after-tax returns for B, C, F and IS classes will differ from those shown for A class.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleShareholderFeesFederatedBondFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedBondFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleExpenseExampleTransposedFederatedBondFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleExpenseExampleNoRedemptionTransposedFederatedBondFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleAnnualTotalReturnsFederatedBondFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">&lt;div style="display:none"&gt;~ http://www.FederatedInvestors.com/role/ScheduleAverageAnnualTotalReturnsTransposedFederatedBondFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <dei:EntityCentralIndexKey contextRef="Duration_01Feb2012_31Jan2013">0000889388</dei:EntityCentralIndexKey>
  <dei:DocumentPeriodEndDate contextRef="Duration_01Feb2012_31Jan2013">2012-11-30</dei:DocumentPeriodEndDate>
  <fisfi:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffective contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">up to but not including the later of (the "Termination Date"): (a) February 1, 2014; or (b) the date of the Fund's next effective Prospectus.</fisfi:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffective>
  <rr:BarChartDoesNotReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000009106_Member">The total returns shown in the bar chart do not reflect the payment of any sales charges or recurring shareholder account fees.</rr:BarChartDoesNotReflectSalesLoads>
  <dei:DocumentEffectiveDate contextRef="Duration_01Feb2012_31Jan2013">2013-01-28</dei:DocumentEffectiveDate>
  <dei:DocumentCreationDate contextRef="Duration_01Feb2012_31Jan2013">2013-01-25</dei:DocumentCreationDate>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024768_Member" unitRef="USD">100000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000009106_MemberC000024771_Member" unitRef="USD">1000000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
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    <link:loc xlink:type="locator" xlink:href="#Item_2" xlink:label="FeeWaiverOrReimbursementOverAssets" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets">The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that total annual fund operating expenses (excluding Acquired Fund Fees and Expenses) paid by the Fund's A, B, C, F and IS classes (after the voluntary waivers and/or reimbursements) will not exceed 0.98%, 1.79%, 1.79%, 1.02% and 0.79% (the "Fee Limit"), respectively, up to but not including the later of (the "Termination Date"): (a) February 1, 2014; 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 additional arrangements prior to the Termination Date, these additional arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Fund's Board of Directors.</link:footnote>
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    <link:loc xlink:type="locator" xlink:href="#Item_7" xlink:label="AverageAnnualReturnYear01" />
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