Exhibit 31.1**Chief Executive Officer Certification**I, John G. Duffy, certify that:1. I have reviewed this Annual Report on Form 10-K of KBW, Inc. (the “Registrant”); 2. Based on my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report; 3. Based on my knowledge, the financial statements, and other financialinformation included in this report, fairly present in all material respectsthe financial condition, results of operations and cash flows of the Registrantas of, and for, the periods presented in this report; 4. The Registrant’s other certifying officer and I are responsible forestablishing and maintaining disclosure controls and procedures (as defined inExchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financialreporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for theRegistrant and have: a) Designed such disclosure controls and procedures, or caused suchdisclosure controls and procedures to be designed under oursupervision, to ensure that material information relating to theRegistrant, including its consolidated subsidiaries, is made known tous by others within those entities, particularly during the period inwhich this report is being prepared;  b) Designed such internal control over financial reporting, or causedsuch internal control over financial reporting to be designed underour supervision, to provide reasonable assurance regarding thereliability of financial reporting and the preparation of financialstatements for external purposes in accordance with generally acceptedaccounting principles;  c) Evaluated the effectiveness of the Registrant’s disclosure controlsand procedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the endof the period covered by this annual report based on such evaluation;and  d) Disclosed in this report any change in the Registrant’s internalcontrol over financial reporting that occurred during the Registrant’smost recent fiscal quarter that has materially affected, or isreasonably likely to materially affect, the Registrant’s internalcontrol over financial reporting; and5. The Registrant’s other certifying officer and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the Registrant’s auditors and the audit committee ofRegistrant’s board of directors (or persons performing the equivalentfunctions): a) All significant deficiencies andmaterial weaknesses in the design oroperation of internal control overfinancial reporting which arereasonably likely to adversely affectthe Registrant’s ability to record,process, summarize and reportfinancial information; and  b) Any fraud, whether or not material,that involves management or otheremployees who have a significant rolein the Registrant’s internal controlover financial reporting.                                  /s/ John G. Duffy   John G. Duffy   Chief Executive Officer   Date: February 27, 2008