Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the Sarbanes-Oxley Act I, Daniel T. Geraci, President and Chief Executive Officer of The Zweig Fund, Inc. (the "Registrant"), certify that: 1. The Form N-CSR of the Registrant containing the financial statements (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Date: March 9, 2006 /s/ Daniel T. Geraci ----------------------------------- Daniel T. Geraci, President and Chief Executive Officer (principal executive officer) I, Nancy G. Curtiss, Treasurer of The Zweig Fund, Inc. (the "Registrant"), certify that: 1. The Form N-CSR of the Registrant containing the financial statements (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. Date: March 9, 2006 /s/ Nancy G. Curtiss ----------------------------------- Nancy G. Curtiss, Treasurer (principal financial officer)