EXHIBIT 15 LETTER RE: UNAUDITED INTERIM FINANCIAL INFORMATION To the Board of Directors and Stockholders of The Bear Stearns Companies Inc.: We have made a review, in accordance with standards established by the American Institute of Certified Public Accountants, of the unaudited interim condensed consolidated financial information of The Bear Stearns Companies Inc. and subsidiaries for the periods ended February 29, 2004 and 2003, as indicated in our report dated April 13, 2004; because we did not perform an audit, we expressed no opinion on that information. We are aware that our report referred to above, which is included in your Quarterly Report on Form 10-Q for the quarter ended February 29, 2004, is incorporated by reference in the following Registration Statements: Filed on Form S-3: Registration Statement No. 33-56009 Registration Statement No. 333-42295 Registration Statement No. 333-43565 Registration Statement No. 333-57083 Registration Statement No. 333-61437 Registration Statement No. 333-66861 Registration Statement No. 333-79417 Registration Statement No. 333-83049 Registration Statement No. 333-31980 Registration Statement No. 333-49876 Registration Statement No. 333-52902 Registration Statement No. 333-76894 Registration Statement No. 333-104455 Registration Statement No. 333-109793 Filed on Form S-8: Registration Statement No. 33-49979 Registration Statement No. 33-50012 Registration Statement No. 33-55804 Registration Statement No. 33-56103 Registration Statement No. 333-16041 Registration Statement No. 333-57661 Registration Statement No. 333-58007 Registration Statement No. 333-66353 Registration Statement No. 333-81901 Registration Statement No. 333-92357 Registration Statement No. 333-50928 Registration Statement No. 333-57460 Registration Statement No. 333-63002 Registration Statement No. 333-74200 Registration Statement No. 333-83580 Registration Statement No. 333-86060 Registration Statement No. 333-101461 Registration Statement No. 333-104006 Registration Statement No. 333-106567 Registration Statement No. 333-106631 Registration Statement No. 333-108976 We are also aware that the aforementioned report, pursuant to Rule 436(c) under the Securities Act of 1933, is not considered a part of the Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of that Act. /s/ Deloitte & Touche LLP New York, New York April 13, 2004 71