UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	August 10, 2006

Form:

N-1A

CIK: 0001363526 Company Name: Federated MDT Series File Number: 333-134468 REFERENCED SERIES/CLASSES (CONTRACTS) Series ID Class/Contract Name S000012967 Federated MDT All Cap Core Fund C000035043 Class A Shares C000035044 Class C Shares C000035045 Institutional Shares Series ID Class/Contract Name S000012968 Federated MDT Tax Aware/All Cap Core Fund C000035046 Class A Shares C000035047 Class C Shares C000035048 Institutional Shares Series ID Class/Contract Name S000012969 Federated MDT Large Cap Growth Fund C000035049 Class A Shares C000035050 Class C Shares C000035051 Institutional Shares Series ID Class/Contract Name S000012970 Federated MDT Mid Cap Growth Fund C000035052 Class A Shares C000035053 Class C Shares C000035054 Institutional Shares Series ID Class/Contract Name S000012971 Federated MDT Balanced Fund C000035055 Class A Shares C000035056 Class C Shares C000035057 Institutional Shares Series ID Class/Contract Name S000012972 Federated MDT Small Cap Core Fund C000035058 Class A Shares C000035059 Class C Shares C000035060 Institutional Shares Series ID Class/Contract Name S000012973 Federated MDT Small Cap Growth Fund C000035061 Class A Shares C000035062 Class C Shares C000035063 Institutional Shares Series ID Class/Contract Name S000012974 Federated MDT Small Cap Value Fund C000035064 Class A Shares C000035065 Class C Shares C000035066 Institutional Shares