Filed by Federated MDT Series

Pursuant to Rule 425 under the Securities Act of 1933 and filed pursuant to Rule
14a-6 of the Securities Act of 1934

Subject Company:  MDT Funds
Commission File No. 811-21904




                                                              November 17, 2006


  URGENT:  SPECIAL MEETING OF MDT ALL CAP CORE FUND, MDT TAX   AWARE / ALL CAP
  CORE FUND, AND MDT SMALL CAP CORE FUND SHAREHOLDERS ADJOURNED UNTIL FRIDAY,
                               DECEMBER 8, 2006

Dear MDT Shareholder:

Today,  the  MDT  Funds'  shareholder  meeting  to reorganize the MDT Funds into
Federated MDT Funds and to authorize new advisory  contracts  was  adjourned for
those  shareholders invested in the MDT All Cap Core Fund, the MDT Tax  Aware  /
All Cap  Core  Fund,  and  the  MDT  Small Cap Core Fund.  Sufficient votes have
already  been obtained for the additional  six  MDT  Funds.    This  adjournment
allows the  proxy  solicitation  process  to continue in an effort to obtain the
required  vote of each fund's outstanding shares.   Although  we  are  close  to
obtaining the necessary vote, we still need your help.  So again, I write to ask
those of you  who  have  not yet cast your vote in the three above mentioned MDT
funds to please vote your  shares before Friday, December 8, 2006.  YOUR VOTE IS
CRITICAL TO THE BUSINESS NEEDS  OF YOUR MDT FUND AND WILL ULTIMATELY PREVENT THE
NEED  FOR  ADDITIONAL  MEETING  POSTPONEMENTS.   The  shareholder  meeting  will
reconvene at 2:00 p.m. Eastern Time on Friday, December 8, 2006.

                        PLEASE CAST YOUR ESSENTIAL VOTE.

Another copy of your ballot(s) has  been  enclosed  with  this  letter  for your
convenience.   Should  you have any questions regarding the proposal or to  vote
your shares by phone, please  call  this  toll-free  number 1-800-499-8541.  The
following voting options have been set up for your convenience.

         1. VOTE BY TELEPHONE.  You may cast your vote  by calling our toll-free
            proxy hotline at 1-800-499-8541.  Representatives  are  available to
            record  your  vote  Monday  through  Friday 9:00 a.m. to 10:00  p.m.
            Eastern Time.

         2. VOTE THROUGH THE INTERNET.   You may cast  your  vote  anytime using
            the  Internet  by logging on to www.myproxyonline.com and  following
            the instructions.

         3. VOTE BY TOUCH-TONE  PHONE.   You  may  cast  your  vote  anytime  by
            telephone by calling 1-866-458-9840 and following the instructions.

         4. VOTE BY MAIL.  You may cast your vote by signing, dating and mailing
            the  enclosed proxy ballot(s) in the postage-prepaid return envelope
            provided.   If  convenient  for you, PLEASE utilize one of the first
            three options above to ensure that your response is received in time
            for the Special Meeting on December 8, 2006.

Again, please do not hesitate to CALL TOLL-FREE  1-800-499-8541  if you have any
questions  regarding this matter.  If you have voted since the mailing  of  this
letter,  we apologize  for  the  follow  up  mailing  and  thank  you  for  your
participation.  PLEASE VOTE TODAY!

Thank you for your assistance with this important matter.

Sincerely,




/s/R. Schorr Berman
R. Schorr Berman
President, MDT Funds











Federated MDT Series ("Federated") (ICA No. 811-21904), filed a proxy
statement/prospectus and other relevant documents concerning the planned
transitions with the United States Securities and Exchange Commission (the
"SEC").  INVESTORS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS AND OTHER
DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE PLANNED TRANSITIONS, OR
INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS, BECAUSE THEY
CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSITIONS, AND RELATED MATTERS.
Investors can obtain these documents free of charge at the SEC Web site
(www.sec.gov).  In addition, documents filed with the SEC by Federated are
available free of charge at 1-800-341-7400 or FEDERATEDINVESTORS.COM.