-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QNMrgU4ko0Vk/2vz9+qMi7Sy6dUeEwpzWX/8vpQYRv85/Yls0hczKJ34gd8rc9sr
 qhnKktJMH4QC+yTddqDJIA==

<SEC-DOCUMENT>9999999995-09-003545.txt : 20091221
<SEC-HEADER>9999999995-09-003545.hdr.sgml : 20091221
<ACCEPTANCE-DATETIME>20091221001521
ACCESSION NUMBER:		9999999995-09-003545
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20091218
DATE AS OF CHANGE:		20091221
EFFECTIVENESS DATE:		20091218

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Federated MDT Series
		CENTRAL INDEX KEY:			0001363526
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0731

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-163310
		FILM NUMBER:		091251378

	BUSINESS ADDRESS:	
		STREET 1:		FEDERATED INVESTORS FUNDS
		STREET 2:		4000 ERICSSON DRIVE
		CITY:			WARRENDALE
		STATE:			PA
		ZIP:			15086-7561
		BUSINESS PHONE:		412-288-1900

	MAIL ADDRESS:	
		STREET 1:		FEDERATED INVESTORS FUNDS
		STREET 2:		4000 ERICSSON DRIVE
		CITY:			WARRENDALE
		STATE:			PA
		ZIP:			15086-7561
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<MERGER-SERIES-AND-CLASSES-CONTRACTS>
<MERGER>
<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012967
<SERIES-NAME>Federated MDT All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035043
<CLASS-CONTRACT-NAME>Class A Shares
</CLASS-CONTRACT>
</SERIES>
</ACQUIRING-DATA>
<TARGET-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012968
<SERIES-NAME>Federated MDT Tax Aware/All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035046
<CLASS-CONTRACT-NAME>Class A Shares
</CLASS-CONTRACT>
</SERIES>
</TARGET-DATA>
</MERGER>
<MERGER>
<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012967
<SERIES-NAME>Federated MDT All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035044
<CLASS-CONTRACT-NAME>Class C Shares
</CLASS-CONTRACT>
</SERIES>
</ACQUIRING-DATA>
<TARGET-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012968
<SERIES-NAME>Federated MDT Tax Aware/All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035047
<CLASS-CONTRACT-NAME>Class C Shares
</CLASS-CONTRACT>
</SERIES>
</TARGET-DATA>
</MERGER>
<MERGER>
<ACQUIRING-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012967
<SERIES-NAME>Federated MDT All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035045
<CLASS-CONTRACT-NAME>Institutional Shares
</CLASS-CONTRACT>
</SERIES>
</ACQUIRING-DATA>
<TARGET-DATA>
CENTRAL INDEX KEY:			0001363526
<SERIES>
<SERIES-ID>S000012968
<SERIES-NAME>Federated MDT Tax Aware/All Cap Core Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000035048
<CLASS-CONTRACT-NAME>Institutional Shares
</CLASS-CONTRACT>
</SERIES>
</TARGET-DATA>
</MERGER>
</MERGER-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2009-12-18</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>11:45:00</finalEffectivenessDispTime>
        <form>N-14</form>
        <filer>
            <cik>0001363526</cik>
            <entityName>Federated MDT Series</entityName>
            <fileNumber>333-163310</fileNumber>
            <seriesClassContractData>
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                    <acquiringEntityName>Federated MDT Series</acquiringEntityName>
                    <acquiringSeriesId>S000012967</acquiringSeriesId>
                    <acquiringSeriesName>Federated MDT All Cap Core Fund</acquiringSeriesName>
                    <acquiringClassContractId>C000035043</acquiringClassContractId>
                    <acquiringClassContractName>Class A Shares</acquiringClassContractName>
                    <targetCik>0001363526</targetCik>
                    <targetEntityName>Federated MDT Series</targetEntityName>
                    <targetSeriesId>S000012968</targetSeriesId>
                    <targetSeriesName>Federated MDT Tax Aware/All Cap Core Fund</targetSeriesName>
                    <targetClassContractId>C000035046</targetClassContractId>
                    <targetClassContractName>Class A Shares</targetClassContractName>
                </merger>
                <merger>
                    <acquiringCik>0001363526</acquiringCik>
                    <acquiringEntityName>Federated MDT Series</acquiringEntityName>
                    <acquiringSeriesId>S000012967</acquiringSeriesId>
                    <acquiringSeriesName>Federated MDT All Cap Core Fund</acquiringSeriesName>
                    <acquiringClassContractId>C000035044</acquiringClassContractId>
                    <acquiringClassContractName>Class C Shares</acquiringClassContractName>
                    <targetCik>0001363526</targetCik>
                    <targetEntityName>Federated MDT Series</targetEntityName>
                    <targetSeriesId>S000012968</targetSeriesId>
                    <targetSeriesName>Federated MDT Tax Aware/All Cap Core Fund</targetSeriesName>
                    <targetClassContractId>C000035047</targetClassContractId>
                    <targetClassContractName>Class C Shares</targetClassContractName>
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                <merger>
                    <acquiringCik>0001363526</acquiringCik>
                    <acquiringEntityName>Federated MDT Series</acquiringEntityName>
                    <acquiringSeriesId>S000012967</acquiringSeriesId>
                    <acquiringSeriesName>Federated MDT All Cap Core Fund</acquiringSeriesName>
                    <acquiringClassContractId>C000035045</acquiringClassContractId>
                    <acquiringClassContractName>Institutional Shares</acquiringClassContractName>
                    <targetCik>0001363526</targetCik>
                    <targetEntityName>Federated MDT Series</targetEntityName>
                    <targetSeriesId>S000012968</targetSeriesId>
                    <targetSeriesName>Federated MDT Tax Aware/All Cap Core Fund</targetSeriesName>
                    <targetClassContractId>C000035048</targetClassContractId>
                    <targetClassContractName>Institutional Shares</targetClassContractName>
                </merger>
            </seriesClassContractData>
        </filer>
    </effectiveData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----