Exhibit 10.6

NYFIX, INC.
2001 STOCK OPTION PLAN
MODEL
NON-QUALIFIED STOCK OPTION AGREEMENT
(TIME VESTING)

                    Non-Qualified Stock Option Agreement (this “Agreement”), dated as of October 2,
2007 (the “Date of Grant”), between NYFIX, Inc. (“NYFIX”) and P. Howard Edelstein (the
“Participant”).

BACKGROUND

Pursuant to the terms of the NYFIX, Inc. 2001 Stock Option Plan (the “Plan”),
NYFIX desires to (i) provide an incentive to the Participant, (ii) encourage the Participant to
contribute materially to the growth of NYFIX and its subsidiaries (collectively, the “Company”)
and (iii) more closely align the Participant’s economic interests with those of NYFIX stockholders
by means of a grant of Nonqualified Options. Whenever capitalized terms are used in this
Agreement, they shall have the meanings set forth in this Agreement or, if not defined in this
Agreement, as set forth in the Plan.

The Plan allows the Company to provide rewards and incentives to certain
employees of the Company by, among other things, granting them opportunities to purchase shares
of Stock. The Board or the Committee has determined that it would be in the best interest of the
Company and its stockholders to grant the Options to the Participant under the Plan.

In consideration of the covenants and agreements set forth in this Agreement, the
Participant and NYFIX hereby agree as follows:

ARTICLE I

GRANT OF OPTIONS

1.1     Grant of Options. The Participant is hereby granted Nonqualified Options
representing the right to purchase 675,069 shares of Stock subject to the restrictions and conditions
set forth in this Agreement. References in this Agreement to “Option” and “Options” mean the
options granted hereby, individually and in the aggregate.

1.2     Option Price. The purchase price of each share of Stock underlying the
Options is $4.60 per share (the “Option Price”), which is the same as the Fair Market Value of a
share of Stock on the Date of Grant. 

1.3     Grant Information. The Options have been granted under the Plan. The
Committee authorized the grant of the Options on October 2, 2007.

ARTICLE II

EXERCISABILITY OF OPTIONS

All of the Options are unvested on the Date of Grant. Options shall vest upon, but
only upon, the earliest to occur of the events described in Section 2.1, 2.2 or 2.3 and shall become
exercisable as described in Section 2.4, in each case subject to the limitations set forth in Section
2.5. All unvested Options shall be forfeitable as set forth in Section 2.5 and shall be non-
transferable as set forth in Section 5.2. All shares of Stock issued upon exercise of Options shall be
transferable, although:

(a)     transferability may be subject to pre-clearance, blackout, registration
and other requirements and restrictions under the Company’s insider trading and other compliance
policies and procedures; and

(b)     transfers by executive officers should be reviewed in advance to
determine if there would be any potential liability for short-swing profits under Section 16(b) of the
Securities Exchange Act of 1934.

(i)     Time Vesting. If not sooner vested and unless previously forfeited
pursuant to Section 2.5, all of the Options shall vest based on the passage of time as follows:
2.7778% of the Options shall vest on October 4, 2007 and on the fourth day of each month
thereafter through and including September 4, 2010.

If a partial Option would vest on any date, the total number of Options vesting
on such date shall be rounded up to the nearest whole Option.

2.2     Accelerated and Continued Vesting. If not sooner vested and exercisable,
and unless previously cancelled pursuant to Section 2.5 or 4.2,

(i)     all of the Options shall vest and become immediately exercisable
upon a termination of the Participant’s employment (a) by the Company without Cause (as defined
in Section 5.1) or (b) by the Participant for Good Reason (as defined in Section 5.1), in either case
within one year following a Change in Control (as defined in Section 5.1); 

(ii)    following a termination of the Participant’s employment (a) by the
Company without Cause or (b) by the Participant for Good Reason, in either case prior to or more
than one year following a Change in Control, the Participant’s Options that would have vested
through the month that includes the last day of the period for which the Participant receives
severance, if any, following such termination (the “Severance Period”), shall immediately vest; and

(iii)   in the event of a termination of the Participant’s employment by
reason of death, the Participant’s Options that would have vested during the nine-month period
following such termination may become immediately vested upon such termination in accordance
with the terms of Section 5 of the Employment Agreement between the Company and the
Participant dated September 4, 2006, as amended from time to time (the “Employment
Agreement”).

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2.3     Discretionary Vesting and Exercisability. The Committee or the Board may
accelerate the vesting of any or all of the Options at any time and for any reason.

2.4     Exercise; Restriction on Exercise. No unvested Options shall be exercisable.
All vested Options shall become exercisable at the time they first vest and shall cease to be
exercisable at the time they expire and are forfeited as provided in Section 2.5 or Article IV.

2.5     Effect of Termination of Employment on Vesting; Expiration of Unvested
Options. All unvested Options expire upon the earliest to occur of: 

(i)     the time of notification of the termination of the Participant’s
employment by the Company for Cause;

(ii)    termination of the Participant’s employment for any reason other than
Cause or, if later, the expiration of the Severance Period, if applicable; and

(iii)   expiration as provided in Section 4.1.

ARTICLE III

EXERCISE OF OPTIONS

3.1     Person Who Can Exercise. Exercisable Options may only be exercised by the
Participant, except that, in the event of the Disability of the Participant, those Options may be
exercised by the Participant’s legal guardian or legal representative and, in the event of death, those
Options may be exercised by the executor or administrator of the Participant’s estate or the person
or persons to whom the Participant’s rights under those Options pass by will or the laws of descent
and distribution.

3.2     Procedure for Exercise. Exercisable Options may be exercised in whole or in
part with respect to any portion thereof that is exercisable. To exercise an exercisable Option, the
Participant (or such other person who shall be permitted to exercise that Option as set forth in
Section 3.1) must complete, sign and deliver to the Company an exercise notice in a form to be
provided by the Company together with payment in full of the Option Price multiplied by the
number of shares of Stock with respect to which that Option is exercised, in accordance with the
option exercise procedures of the Company as in effect from time to time. The right to exercise any
Option shall be subject to the satisfaction of all conditions set forth in such form of exercise notice.
Payment of the Option Price shall be made in cash (including check, bank draft or money order).
The Participant’s right to exercise the Option shall be subject to the satisfaction of all conditions set
forth in such exercise notice.

3.3      Withholding of Taxes.

(i)     The Company shall withhold or deduct from any or all payments oramounts
due to or held for the Participant (or such other person who may be permitted to exercise
Options as set forth in Section 3.1), whether due from the Company or held in the account of the
Participant (or such other person) at any broker facilitating the exercise of Options, or secure
payment from the Participant of, an amount (the “Withholding Amount”) equal to all taxes

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(including unemployment (including FUTA), social security and medical (including FICA), and
other governmental charges of any kind as well as income and other taxes) required under any
applicable law to be withheld or deducted with respect to any and all taxable income and other
amounts attributable to the Options.

                              (ii)     The Withholding Amount shall be determined by the Company.

                              (iii)     Immediately upon request by the Company, the Participant agrees to pay
all, or a portion if so requested by the Company, of the Withholding Amount to the Company in cash.

(iv)     The timing of withholding or deduction from such payments or
amounts shall be determined by the Company.

ARTICLE IV

EXPIRATION OF OPTIONS

          4.1     Expiration. Vested and unvested Options shall expire at 5:00 p.m., Eastern
Daylight Time on October 2, 2017.

4.2     Earlier Expiration. Notwithstanding Section 4.1, unless otherwise
determined by the Committee, Options shall be forfeited and shall expire on the earliest to occur of
the following:

(i)      all unvested Options shall expire as provided in Section 2.5;

(ii)     upon the Participant’s termination of employment by the Company for Cause,
all vested Options shall expire immediately at the time notice of such termination is given (unless
otherwise determined by the Company in its sole discretion);

(iii)    upon the Participant’s termination of employment by the Company
without Cause or the Participant’s resignation from employment with the Company other than in
connection with death or Disability, all vested Options shall expire upon the earlier of (a) the
ninetieth day following the date of such termination or (b) the expiration of the Options under
Section 4.1; and

(iv)     upon the Participant’s termination of employment due to the
Participant’s death or Disability, all vested Options shall expire upon the earlier of (a) the 12 month
anniversary of the date of such termination or (b) the expiration of the Options under Section 4.1.

4.3     Cancellation. Vested and unvested Options which expire unexercised shall
be treated as cancelled.

4.4     Effective Date. For purposes hereof, except as otherwise set forth in Sections
2.5 and 4.2, the date of resignation or termination of employment means the last date of actual
employment, even if a different date is used for administrative convenience in connection with
employee retirement, benefit or welfare plans.

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ARTICLE V

MISCELLANEOUS

5.1     Definitions. The terms “Cause”, “Change in Control”, “Disability” and
“Good Reason” shall each have the meaning ascribed to such term in the Employment Agreement.

5.2     Options Not Transferable. Options may not be transferred (other than by will
or laws of descent and distribution). Any attempt to effect a transfer of Options that is not permitted
by the Plan or this Agreement shall be null and void.

5.3     Section 409A of the Code. The parties recognize that certain provisions of
this Agreement may be affected by Section 409A of the Code and agree to negotiate in good faith to
amend this Agreement with respect to any changes necessary or advisable to comply with Section
409A of the Code.

5.4     Section 162(m) of the Code. The Options were granted in a manner intended
to meet the requirements of “qualified performance based compensation” under Section 162(m) of
the Code.

5.5     Notices. All notices, requests and demands to or upon the parties hereto to be
effective shall be in writing (including by telecopy), and, unless otherwise expressly provided
herein, shall be deemed to have been duly given or made when delivered by hand, or three days
after being deposited in the mail, postage prepaid, or, in the case of telecopy or email notice, when
received, addressed as follows to the Company and the Participant, or to such other address as may
be hereafter notified by the parties hereto:

(i)	If to the Company, to it at the following address:
	NYFIX, Inc. 100 Wall Street - 26th Floor New York, NY 10005 Attn: General Counsel

          (ii)     If to the Participant, to his or her most recent primary residential address or
business telecopy or email address as shown on the records of the Company.

5.6     No Right To Continued Employment. The Participant acknowledges and
agrees that, notwithstanding the fact that the vesting of the Options is contingent upon his or her
continued employment by the Company, this Agreement does not constitute an express or implied
promise of continued employment or confer upon the Participant any rights with respect to
continued employment by the Company.

5.7      Amendments and Conflicting Agreements.

(a)     This Agreement may be amended by a written instrument executed by
the parties which specifically states that it is amending this Agreement or by a written

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instrument executed by the Company which so states if such amendment is not adverse to the
Participant or relates to administrative matters.

                              (b)     To the extent the provisions of this Agreement relating to
vesting, execisability or termination of the Options are inconsistent with the terms of the
Employment Agreement, the terms of this Agreement shall control and the Employment Agreement
is hereby deemed amended to the extent of such inconsistency to conform to the terms of this
Agreement.

                    5.8     Governing Law and Interpretation. This Agreement shall be governed by and
construed and enforced in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed therein without regard to the conflicts of law principles thereof.
Whenever the word “including” is used herein, it shall be deemed to be followed by the phrase
“without limitation.” Unless otherwise specified herein, all determinations, consents, elections and
other decisions by the Committee may be made, withheld or delayed in its sole and absolute
discretion.

                    5.9     Titles. Titles are provided herein for convenience only and are not to serve as
a basis for interpretation or construction of this Agreement.

                    5.10    Counterparts. This Agreement may be executed in counterparts, which
together shall constitute one and the same instrument and which will be deemed effective whether
received in original form or by telecopy or other electronic means. Facsimile signatures shall be as
effective as original signatures.

                    5.11    Construction. The construction of this Agreement is vested in the
Committee, and the Committee’s construction shall be final and conclusive on all persons.

* * *

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                    IN WITNESS WHEREOF, the Company has caused this Agreement to be
executed by a duly authorized officer.

NYFIX, INC.

By:  /s/ Scott A. Bloom     
Name:  Scott A. Bloom     

PARTICIPANT’S ACCEPTANCE

The Participant acknowledges that he or she has read this Agreement, has received
and read the Plan, and understands the terms and conditions of this Agreement and the Plan and
hereby accepts the foregoing Options and agrees to be bound by the terms and conditions of this
Agreement and the Plan.

PARTICIPANT

  /s/ P. Howard Edelstein     
Signed

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