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 10, 2006


                  URGENT:  MEETING IS ON FRIDAY, NOVEMBER 17TH


Dear MDT Shareholder:

Your vote is critical.  AS ONE OF THE LARGEST SHAREHOLDERS WHO HAVE NOT YET
VOTED, WE ARE ASKING YOU TO PLEASE VOTE YOUR MDT FUND SHARES IMMEDIATELY.  It is
essential to the business needs of your MDT fund that your shares be represented
at the November 17th Special Meeting.

               IT ONLY TAKES A MOMENT TO CAST YOUR CRITICAL 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.proxyvote.com and following the
            instructions.

         3. VOTE BY TOUCH-TONE PHONE.  You may cast your vote anytime by calling
            the toll-free number found on the enclosed proxy ballot(s).

         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 November 17, 2006.

Again, please do not hesitate to CALL TOLL-FREE 1-800-499-8541 if  you  have any
questions regarding this matter.  PLEASE vote today!

Thank you for your assistance with this important matter.

Sincerely,



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





                                                                        NOBO








Federated MDT Series ("Federated") (ICA No. 811-21904), filed a proxy
statement/prospectus and other relevant documents concerning the planned
transactions 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 TRANSACTIONS, OR
INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS, BECAUSE THEY
CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSACTIONS, 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.







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 10, 2006


                  URGENT:  MEETING IS ON FRIDAY, NOVEMBER 17TH


Dear MDT Shareholder:

Your vote is critical.  AS ONE OF THE LARGEST SHAREHOLDERS WHO HAVE NOT YET
VOTED, WE ARE ASKING YOU TO PLEASE VOTE YOUR MDT FUND SHARES IMMEDIATELY.  It is
essential to the business needs of your MDT fund that your shares be represented
at the November 17th Special Meeting.

               IT ONLY TAKES A MOMENT TO CAST YOUR CRITICAL 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 November 17, 2006.

Again, please do not hesitate to CALL TOLL-FREE 1-800-499-8541  if  you have any
questions regarding this matter.  PLEASE vote today!

Thank you for your assistance with this important matter.

Sincerely,



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





                                                                        REG








Federated MDT Series ("Federated") (ICA No. 811-21904), filed a proxy
statement/prospectus and other relevant documents concerning the planned
transactions 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 TRANSACTIONS, OR
INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS, BECAUSE THEY
CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSACTIONS, 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.



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 10, 2006


                  URGENT:  MEETING IS ON FRIDAY, NOVEMBER 17TH


Dear MDT Shareholder:

Your vote is critical.  AS ONE OF THE LARGEST SHAREHOLDERS WHO HAVE NOT YET
VOTED, WE ARE ASKING YOU TO PLEASE VOTE YOUR MDT FUND SHARES IMMEDIATELY.  It is
essential to the business needs of your MDT fund that your shares be represented
at the November 17th Special Meeting.

               IT ONLY TAKES A MOMENT TO CAST YOUR CRITICAL VOTE.

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

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

         2. VOTE BY TOUCH-TONE PHONE.  You may cast your vote anytime by calling
            the toll-free number found on the enclosed proxy ballot(s).

         3. 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
            two options above to ensure that your response is received  in  time
            for the Special Meeting on November 17, 2006.

Again,  please  do not hesitate to CALL TOLL-FREE 1-800-499-8541 if you have any
questions regarding this matter.  PLEASE vote today!

Thank you for your assistance with this important matter.

Sincerely,



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











                                                                            OBO








Federated MDT Series ("Federated") (ICA No. 811-21904), filed a proxy
statement/prospectus and other relevant documents concerning the planned
transactions 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 TRANSACTIONS, OR
INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS, BECAUSE THEY
CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSACTIONS, 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.