Exhibit 32

Section 1350 Certifications

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)

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 Credit Suisse (USA), Inc. (the “Company”) does hereby certify, to such officer’s knowledge, that:

1.the Quarterly Report on Form 10-Q for the quarter ended September 30, 2006 of the Company (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 Company.

November 14, 2006	/s/ Brady W. Dougan
	Name:	Brady W. Dougan
	Title:	President and Chief Executive Officer
November 14, 2006
	/s/ Paul J. O’Keefe
	Name:	Paul J. O’Keefe
	Title:	Chief Financial and Accounting Officer