EX-24.

LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS

The undersigned hereby constitutes and appoints each of Annemarie Tierney and
Steven Vigliotti, and their designees, severally, as the undersigned's true and lawful
attorneys-in-fact and agents, with full power of substitution or revocation, for the
undersigned and in the undersigned's name, place and stead, to:

(1)	execute for and on behalf of the undersigned, in the undersigned's capacity as an
officer and/or director of NYFIX, Inc. (the "Company"), Forms 3, 4, and 5
(including any amendments thereto) in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules promulgated
thereunder (the "Exchange Act");

(2)	do and perform any and all acts for and on behalf of the undersigned which may
be necessary or desirable to prepare, complete and execute any such Form 3, 4, or
5 or any amendment or amendments thereto, and timely deliver and file any such
Form with the United States Securities and Exchange Commission and any stock
exchange or similar authority; and

(3)	seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information regarding transactions in the Company's securities from any
third party, including brokers, employee benefit plan administrators and trustees,
and the undersigned hereby authorizes any such person to release any such
information to such attorney-in-fact and approves and ratifies any such release of
information; and

(4)	take any other action of any type whatsoever in connection with the foregoing
which, in the opinion of such attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in such attorney-in-
fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform each and every act and thing requisite, necessary, or proper
to be done in the exercise of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do in person, with full power of
substitution and revocation, hereby ratifying and confirming all that such attorney-in-fact,
or such attorney-in-fact's substitute, substitutes, designee or designees shall lawfully do
or cause to be done by virtue of this Power of Attorney and the rights and powers herein
granted.

      The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming nor relieving, nor is the
Company assuming nor relieving, any of the undersigned's responsibilities to comply
with Section 16 of the Exchange Act.  The undersigned acknowledges that neither the
Company nor the foregoing attorneys-in-fact assume (i) any liability for the
undersigned's responsibility to comply with the requirements of the Exchange Act, (ii)
any liability of the undersigned for any failure to comply with such requirements, or (iii)
any obligation or liability of the undersigned for profit disgorgement under Section 16(b)
of the Exchange Act.

      This Power of Attorney shall remain in full force and effect until the undersigned
is no longer required to file Forms 3, 4, and 5 under Section 16 of the Exchange Act with
respect to the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 6th day of February, 2008.


      /s/ William Janeway

EX-99.1

Designated Filer: William H, Janeway
Issuer & Ticker Symbol:        NYFIX, Inc. (NYFX)
Date of Event Requiring Statement: February 6, 2008
Exhibit 99.1
Explanation of Responses:

(1) Warburg Pincus Private Equity IX, L.P., a Delaware limited partnership ("WP IX") is the direct record owner of 2,486,327 
shares of Common Stock and 1,500,000 shares of Preferred Stock, which is convertible into 15,000,000 shares of Common Stock. The 
sole general partner of WP IX is Warburg Pincus IX, LLC, a New York limited liability company ("W2 IX LLC"); Warburg 
Pincus Partners, LLC, a New York limited liability company ("WPP LLC"), is the sole member of WP IX LLC; Warburg 
Pincus & Co., a New York general partnership ("WP"), is the managing member of WPP LLC; Warburg Pincus LLC, a New 
York limited liability company ("WP LLC"), manages WP IX; and Charles R. Kaye and Joseph P. Landy ate each 
Managing General Partners of WP and Co-Presidents and Manag
ing Members of WP LLC. By reason of the provisions of 
Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Act"), WP, WP LLC, WPP LLC, WP IX LLC, Mr. Kaye 
and Mr. Landy may be deemed to be the beneficial owners of any securities that may be deemed to be beneficially owned 
by WP IX. Each of WP, WP LLC, WPP LLC, WP IX LLC, Mr. Kaye and Mr. Landy disclaim beneficial ownership of all shares 
of the Common Stock and Preferred Stock beneficially owned by WP IX, except to the extent of any 
indirect pecuniary interest therein.

Mr. Janeway, who became a director of the Issuer on October 12, 2006, is a partner of WP, and a member and Senior 
Advisor of WP LLC. As such, Mr. Janeway may be deemed to have an indirect pecuniary interest (within the meaning of 
Rule 16a-1 of the Act) in an indeterminate portion of the securities reported as beneficially owned by WP Ix. Mr. 
Janeway disclaims beneficial ownership of such securities, except to the extent of any indirect pecuni
ary interest 
therein. Mr. Janeway does not directly own any shares of Common Stock or Preferred Stock.

(2) Each share of Preferred Stock is initially convertible into 10 shares of Common Stock at an initial conversion 
price of $5.00 per share, subject to certain adjustments in accordance with the terms of the Preferred Stock.

(3) The Preferred Stock is convertible, in whole or in part, at any time and from time to time at the holder's 
election. At any time after April 12, 2008, the Preferred Stock is convertible at the option of the Issuer, in whole 
or in part, if the price per share of the Common Stock reaches certain levels. The conversion rights do not expire.

(4) The exercise price of the Warrant to Purchase Common Stock (the "Warrant") is initially equal to $7.75 per 
share of Common Stock, subject to certain adjustments in accordance with the terms of the Warrant.

(5) The Warrant is convertible at any time, in whole or in part, at the holder's option until 5:0
0 p.m. Eastern Time 
on October 12, 2016, at which point the Warrant expires.

(6) WP IX is the direct record owner of the Warrant, which is convertible into 2,250,000 shares of Common Stock. 
The sole general partner of WP IX is WP IX LLC; WPP LLC is the sole member of WP IX LLC; WP is the managing member 
of WPP LLC; WP LLC manages WP IX; and Charles R. Kaye and Joseph P. handy are each Managing General Partners of 
WP and Co-Presidents and Managing Members of WP LLC. By reason of the provisions of Rule 16a-1 of the Act, WP, 
WP LLC, WPP LLC, WP IX LLC, Mr. Kaye and Mr. Landy may be deemed to be the beneficial owners of any securities that may 
be deemed to be beneficially owned by WP IX. Each of WP, WP LLC, WPP LLC, WP IX LLC, Mr. Kaye and Mr. Landy disclaim 
beneficial ownership of the Warrant beneficially owned by WP IX, except to the extent of any indirect pecuniary 
interest therein.

Mr. Janeway, who became a director of the Issuer on October 12, 2006, is a partner o
f WP, and a member and Senior 
Advisor of WP LLC. As such, Mr. Janeway may be deemed to have an indirect pecuniary interest (within the meaning of 
Rule 16a-1 of the Act) in the Warrant reported as beneficially owned by WP IX. Mr. Janeway disclaims beneficial 
ownership of the Warrant, except to the extent of any indirect pecuniary interest therein. Mr. Janeway does not 
directly own the Warrant.