Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

I, Robert C. Doll, Jr., Chief Executive Officer of BlackRock Global Financial
Services Fund, Inc. and Global Financial Services Master Trust (together, the
"Fund"), certify that:

      1.    The N-CSR of the Fund (the "Report") fully complies with the
            requirements of Section 13(a) or 15(d) of the Securities Exchange
            Act of 1934; and

      2.    The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Fund.

Dated: May 21, 2007


                                             /s/ Robert C. Doll, Jr.
                                             -----------------------------------
                                             Robert C. Doll, Jr.,
                                             Chief Executive Officer of
                                             BlackRock Global Financial Services
                                             Fund, Inc. and Global Financial
                                             Services Master Trust

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to BlackRock Global Financial
Services Fund, Inc. and Global Financial Services Master Trust and will be
retained by BlackRock Global Financial Services Fund, Inc. and Global Financial
Services Master Trust and furnished to the Securities and Exchange Commission or
its staff upon request.



Exhibit 99.1350CERT

         Certification Pursuant to Section 906 of the Sarbanes Oxley Act

I, Donald C. Burke, Chief Financial Officer of BlackRock Global Financial
Services Fund, Inc. and Global Financial Services Master Trust (together, the
"Fund"), certify that:

      1.    The N-CSR of the Fund (the "Report") fully complies with the
            requirements of Section 13(a) or 15(d) of the Securities Exchange
            Act of 1934; and

      2.    The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Fund.

Dated: May 21, 2007


                                             /s/ Donald C. Burke
                                             -----------------------------------
                                             Donald C. Burke,
                                             Chief Financial Officer of
                                             BlackRock Global Financial Services
                                             Fund, Inc. and Global Financial
                                             Services Master Trust

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to BlackRock Global Financial
Services Fund, Inc. and Global Financial Services Master Trust and will be
retained by BlackRock Global Financial Services Fund, Inc. and Global Financial
Services Master Trust and furnished to the Securities and Exchange Commission or
its staff upon request.