UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 1)*

                                COWEN GROUP, INC.
                                (Name of Issuer)

                     COMMON STOCK, PAR VALUE $0.01 PER SHARE
                         (Title of Class of Securities)

                                   223621103
                                 (CUSIP Number)

                                DECEMBER 31, 2007
                      (Date of Event which Requires Filing
                               of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [X] Rule 13d-1(b)
                                [ ] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)


*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                          Continued on following pages
                               Page 1 of 10 Pages
                              Exhibit Index: Page 8



CUSIP NO. 223621103 PAGE 2 OF 10 PAGES 1 Names of Reporting Persons I.R.S. Identification Nos. of above persons (entities only) PERRY CORP. 2 Check the Appropriate Box If a Member of a Group (See Instructions) a. [ ] b. [ ] 3 SEC Use Only 4 Citizenship or Place of Organization NEW YORK 5 Sole Voting Power Number of 0 Shares Beneficially 6 Shared Voting Power Owned By 0 Each Reporting 7 Sole Dispositive Power Person 0 With 8 Shared Dispositive Power 0 9 Aggregate Amount Beneficially Owned by Each Reporting Person 0 10 Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] 11 Percent of Class Represented By Amount in Row (9) 0.00% 12 Type of Reporting Person (See Instructions) IA, CO

CUSIP NO. 223621103 PAGE 3 OF 10 PAGES 1 Names of Reporting Persons I.R.S. Identification Nos. of above persons (entities only) RICHARD C. PERRY 2 Check the Appropriate Box If a Member of a Group (See Instructions) a. [ ] b. [ ] 3 SEC Use Only 4 Citizenship or Place of Organization UNITED STATES 5 Sole Voting Power Number of 0 Shares Beneficially 6 Shared Voting Power Owned By 0 Each Reporting 7 Sole Dispositive Power Person 0 With 8 Shared Dispositive Power 0 9 Aggregate Amount Beneficially Owned by Each Reporting Person 0 10 Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] 11 Percent of Class Represented By Amount in Row (9) 0.00% 12 Type of Reporting Person (See Instructions) IN, HC

CUSIP NO. 223621103 PAGE 4 OF 10 PAGES ITEM 1(A) NAME OF ISSUER: Cowen Group, Inc. (the "Issuer"). ITEM 1(B) ADDRESS OF THE ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 1221 Avenue of the Americas New York, NY 10020 ITEM 2(A) NAME OF PERSON FILING: This statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons"): i) Perry Corp.; and ii) Richard C. Perry, in his capacities as the President and sole stockholder of Perry Corp. ("Mr. Perry"). This statement relates to Shares (as defined herein) held for the accounts of two or more private investment funds for which Perry Corp. acts as general partner and/or managing member of the general partner and/or investment adviser. ITEM 2(B) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: The address of the principal business office of each of the Reporting Persons is 767 Fifth Avenue, New York, New York 10153. ITEM 2(C) CITIZENSHIP: 1) Perry Corp. is a New York corporation; and 2) Mr. Perry is a citizen of the United States. ITEM 2(D) TITLE OF CLASS OF SECURITIES: Common Stock, par value $0.01 per share (the "Shares"). ITEM 2(E) CUSIP NUMBER: 223621103 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A: i) Perry Corp. is an investment adviser registered under Section 203 of the Investment Advisers Act of 1940. ii) Mr. Perry is a control person of Perry Corp.

CUSIP NO. 223621103 PAGE 5 OF 10 PAGES ITEM 4. OWNERSHIP: ITEM 4(A) AMOUNT BENEFICIALLY OWNED: As of the Date of Event, each of the Reporting Persons may be deemed to be the beneficial owner of no Shares. ITEM 4(B) PERCENT OF CLASS: As of the Date of Event, each of the Reporting Persons may be deemed to be the beneficial owner of 0.00% of the total number of Shares outstanding. ITEM 4(C) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: PERRY CORP. (i) Sole power to vote or direct the vote 0 (ii) Shared power to vote or to direct the vote 0 (iii) Sole power to dispose or to direct the disposition of 0 (iv) Shared power to dispose or to direct the disposition of 0 MR. PERRY (i) Sole power to vote or direct the vote 0 (ii) Shared power to vote or to direct the vote 0 (iii) Sole power to dispose or to direct the disposition of 0 (iv) Shared power to dispose or to direct the disposition of 0 ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: If this statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owners of more than five percent of the class of securities, check the following [X]. ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON: This Item 6 is not applicable. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY: Perry Corp. is the relevant entity for which Mr. Perry may be considered a control person. Perry Corp. is an investment adviser registered under the Investment Advisers Act of 1940.

CUSIP NO. 223621103 PAGE 6 OF 10 PAGES ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP: This Item 8 is not applicable. ITEM 9. NOTICE OF DISSOLUTION OF GROUP: This Item 9 is not applicable. ITEM 10. CERTIFICATION: By signing below each of the Reporting Persons certifies that, to the best of such person's knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the Issuer of such securities and were not acquired and are not held in connection with or as a participant in any transaction having such purpose or effect.

CUSIP NO. 223621103 PAGE 7 OF 10 PAGES SIGNATURES After reasonable inquiry and to the best of my knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Date: February 8, 2008 PERRY CORP. Name: /s/ Michael Neus* --------------------------------------------- By: Richard C. Perry Title: President Date: February 8, 2008 RICHARD C. PERRY By: /s/ Michael Neus* --------------------------------------------- *By Michael Neus, attorney-in-fact

CUSIP NO. 223621103 PAGE 8 OF 10 PAGES EXHIBIT INDEX PAGE NO. A. Joint Filing Agreement, dated as of February 8, 2008, by and among the Reporting Persons.......................................................................... 9 B. Power of Attorney, dated June 21, 2005........................................... 10

CUSIP NO. 223621103 PAGE 9 OF 10 PAGES EXHIBIT A JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13G with respect to the Common Stock, par value $0.01 per share, of Cowen Group, Inc. dated as of February 8, 2008, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934. Date: February 8, 2008 PERRY CORP. Name: /s/ Michael Neus* --------------------------------------------- By: Richard C. Perry Title: President Date: February 8, 2008 RICHARD C. PERRY By: /s/ Michael Neus* --------------------------------------------- *By Michael Neus, attorney-in-fact

CUSIP NO. 223621103 PAGE 10 OF 10 PAGES EXHIBIT B POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENT, that I, RICHARD Perry, hereby make, constitute and appoint each of PAUL LEFF and MICHAEL NEUS acting individually, as my agent and attorney-in-fact for the purpose of executing in my name, (a) in my personal capacity or (b) in my capacity as an officer of, shareholder of or in other capacities with Perry Corp. ("Perry") and each of its affiliates or entities advised by me or Perry, all documents, certificates, instruments, statements, filings and agreements ("documents") to be filed with or delivered to any foreign or domestic governmental or regulatory body or required or requested by any other person or entity pursuant to any legal or regulatory requirement relating to the acquisition, ownership, management or disposition of securities, futures contracts or other investments, and any other documents relating or ancillary thereto, including without limitation all documents relating to filings with the Commodity Futures Trading Commission and National Futures Association, the United States Securities and Exchange Commission (the "SEC") pursuant to the Securities Act of 1933 or the Securities Exchange Act of 1934 (the "Act") and the rules and regulations promulgated thereunder, including all documents relating to the beneficial ownership of securities required to be filed with the SEC pursuant to Section 13(d) or Section 16(a) of the Act and any information statements on Form 13F required to be filed with the SEC pursuant to Section 13(f) of the Act. All past acts of these attorneys-in-fact in furtherance of the foregoing are hereby ratified and confirmed. This power of attorney shall be valid from the date hereof until revoked by me. IN WITNESS WHEREOF, I have executed this instrument as of the 21st day of June 2005. /s/ Richard Perry ------------------------------ Richard Perry