0000357236 fmst:S000009100Member 2012-01-01 2012-12-31 0000357236 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member fmst:C000082761Member 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member fmst:C000024715Member 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member rr:AfterTaxesOnDistributionsMember fmst:C000024715Member 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member rr:AfterTaxesOnDistributionsAndSalesMember fmst:C000024715Member 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member fmst:RussellThousandValueIndexMember 2012-01-01 2012-12-31 0000357236 fmst:S000009100Member fmst:SandPFiveHundredIndexMember 2012-01-01 2012-12-31 pure iso4217:USD <div style="display:none">~ http://www.FederatedInvestors.com/role/ScheduleShareholderFeesFEDERATEDMDTSTOCKTRUST column period compact * ~</div> <div style="display:none">~ http://www.FederatedInvestors.com/role/ScheduleAnnualFundOperatingExpensesFEDERATEDMDTSTOCKTRUST column period compact * ~</div> <div style="display:none">~ http://www.FederatedInvestors.com/role/ScheduleExpenseExampleTransposedFEDERATEDMDTSTOCKTRUST column period compact * ~</div> <div style="display:none">~ http://www.FederatedInvestors.com/role/ScheduleAverageAnnualTotalReturnsTransposedFEDERATEDMDTSTOCKTRUST column period compact * ~</div> 485BPOS 0000357236 false 2012-12-27 2012-12-31 2012-10-31 Federated MDT Stock Trust (the "Fund") RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE The Fund's investment objective is to provide growth of income and capital. RISK/RETURN SUMMARY: FEES AND EXPENSES This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) and Service Shares (SS) of the Fund. Shareholder Fees (fees paid directly from your investment) 0 0 0 0 0 0 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) January 1, 2014 0.0075 0.0075 0 0 0.0057 0.0057 0 0 0.0132 0.0132 0.0077 0.0099 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 based on the contractual expense limitation 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: Portfolio Turnover 104 104 325 325 563 563 1248 1248 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 121% of the average value of its portfolio. 1.21 RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE What are the Fund's Main Investment Strategies? The Fund seeks to achieve its objective by investing primarily in the common stock of U.S. companies. The Fund's investment adviser's investment strategy utilizes a large-cap value approach by selecting most of its investments from companies listed in the Russell 1000® Value Index, an index that measures the performance of those companies with lower price-to-book ratios and lower forecasted growth values within the large-cap segment of the U.S. equity universe, which includes the 1,000 largest U.S. companies by market capitalization. The Fund considers large-cap companies to be those of a size similar to companies listed in the Russell 1000® Value Index. As of October 31, 2012, companies in the Russell 1000® Value Index ranged in market capitalization from $309 million to $426.3 billion. As more fully described in this Prospectus, the Fund's investments primarily include the following: equity securities of domestic issuers. The Fund's investment adviser implements its strategy using a quantitative computer model driven by fundamental stock selection variables, including company valuations, profit trends and earnings risks. This process, called the Optimum Q process, seeks to impose strict discipline over stock selection, unimpeded by market or manager psychology. It seeks to maximize compound annual return while controlling risk. Because the Fund refers to equity 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 net assets (plus any borrowings for investment purposes) in equity investments. The Fund actively trades its portfolio securities in an attempt to achieve its investment objective. Active trading will cause the Fund to have an increased portfolio turnover rate, which may generate shorter-term gains (losses) for its shareholders, which are taxed at a higher rate than longer-term gains (losses). Actively trading portfolio securities increases the Fund's trading costs and may have an adverse impact on the Fund's performance. 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: <ul><li>Stock Market Risk. The value of equity securities in the Fund's portfolio will fluctuate and, as a result, the Fund's Share price may decline suddenly or over a sustained period of time.</li></ul><ul><li>Large Sized Companies Risk. The Fund will principally invest in large-size companies. Although diminished in larger cap companies, the risks of investing in all companies include business failure and reliance on erroneous reports. Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors.</li></ul><ul><li>Risk Related to Investing for Value. Due to their relatively low valuations, value stocks are typically less volatile than growth stocks. Additionally, value stocks tend to have higher dividends than growth stocks. This means they depend less on price changes for returns and may lag behind growth stocks in an up market.</li></ul><ul><li>Sector Risk. Because the Fund may allocate relatively more assets to certain industry sectors than others, the Fund's performance may be more susceptible to any developments which affect those sectors emphasized by the Fund.</li></ul><ul><li>Quantitative Modeling Risk. The Fund employs quantitative models as a management technique. These models examine multiple economic factors using various proprietary and third-party data. The results generated by quantitative analysis may perform differently than expected and may negatively affect Fund performance for various reasons (for example, human judgment, data imprecision, software or other technology malfunctions, or programming inaccuracies).</li></ul>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. All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. 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 shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. 1-800-341-7400 FederatedInvestors.com The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Federated MDT Stock Trust - SS Class The Fund's SS class total return for the nine month period from January 1, 2012 to September 30, 2012, was 32.10%. Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 16.77% (quarter ended June 30, 2003). Its lowest quarterly return was (19.39)% (quarter ended September 30, 2002). Average Annual Total Return Table In addition to Return Before Taxes, Return After Taxes is shown for the Fund's SS class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for the SS class and after tax-returns for the IS class will differ from those shown for the SS 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 plans. (For the Period Ended December 31, 2011) 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 plans. In addition to Return Before Taxes, Return After Taxes is shown for the Fund's SS class to illustrate the effect of federal taxes on Fund returns. -0.1907 0.2792 0.099 0.0507 0.174 -0.3186 0.0127 0.0201 <div style="display:none">~ http://www.FederatedInvestors.com/role/ScheduleAnnualTotalReturnsFEDERATEDMDTSTOCKTRUSTBarChart column period compact * ~</div> 2012-09-30 0.321 highest quarterly return 2003-06-30 0.1677 lowest quarterly return 2002-09-30 -0.1939 The Fund's SS class total return for the nine month period 0.0201 -0.0007 0.0407 0.0223 0.0039 0.0211 -0.0167 -0.0281 -0.0146 -0.016 -0.0264 -0.0025 0.0258 0.0137 0.0214 0.0261 0.0389 0.0292 up to but not including the later of (a) January 1, 2014 (the "Termination Date"); or (b) the date of the Fund's next effective Prospectus. 0 0 The Fund's IS class commenced operations on January 29, 2010. For the period prior to the commencement of operations of the IS class, the performance information shown below is for the Fund's SS class. The performance of the SS 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 SS class. The performance of the SS class has been adjusted to remove any voluntary waiver of Fund expenses related to the SS class that may have occurred during the period prior to the commencement of operations of the IS class. 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 SS 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. FEDERATED MDT STOCK TRUST 0.0028 0.0028 -0.0027 -0.0005 0.1887 0.0988 2012-12-28 Under the investment advisory contract, the Adviser is required to reimburse/waive the amount, limited to the amount of the management fee, by which the Fund's aggregate annual operating expenses, including the management fee, but excluding interest, taxes, brokerage commissions, expenses of registering and qualifying the Fund and its Shares under federal and state laws, expenses of withholding taxes and extraordinary expenses, exceed (after voluntary waivers and reimbursements) 1.00% of its average daily net assets. Shareholders must approve any changes to this contractual waiver/reimbursement. In addition, 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, if any) paid by the Fund's IS class and SS class will not exceed 0.77% and 0.99% (the "Fee Limit"), respectively, up to but not including the later of (a) January 1, 2014 (the "Termination Date"); 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 Trustees. The Russell 1000® Value Index measures the performance of the large-cap value segment of the U.S. equity universe. It includes those Russell 1000 companies with lower price-to-book ratios and higher forecasted growth values. S&P 500 Index is a market capitalization-weighted index of the stocks in the S&P 500 Index having the lowest price to book ratios.