EXHIBIT 32

                                  CERTIFICATION
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
(SUBSECTIONS (a) AND (a) OF SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES
                                      CODE)

         Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections
(a) and (b) of section 1350, chapter 63 of title 18, United States Code), each
of the undersigned officers of Instinet Group Incorporated, a Delaware
corporation (the "Company"), does hereby certify, to such officer's knowledge,
that:

         The Quarterly Report on Form 10-Q for the quarter ended September 30,
2003 (the "Form 10-Q") of the Company fully complies with the requirements of
section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information
contained in the Form 10-Q fairly presents, in all material respects, the
financial condition and results of operations of the Company.

Dated: November 14, 2003                        /s/ Edward J. Nicoll
                                             --------------------------------
                                             Edward J. Nicoll
                                             Chief Executive Officer

                                                /s/ John F. Fay
                                             --------------------------------
                                             John F. Fay
                                             Chief Financial Officer