Document:

EXHIBIT
10.17

EMPLOYMENT AGREEMENT

THIS
EMPLOYMENT AGREEMENT (“Agreement”) is made and entered into as of this 1st day
of January, 2007, by and between the CHICAGO BOARD OPTIONS EXCHANGE (“Employer”)
and EDWARD TILLY (“Employee”), to be effective August 21, 2006 (the “Effective
Date”).

WITNESSETH:

WHEREAS, Employer desires that Employee
continue to provide services for the benefit of the Employer and its
affiliates;

WHEREAS, Employer and Employee acknowledge
that Employee will continue to be a member of the senior management team of the
Employer and, as such, will continue to participate in implementing the
Employer’s business plan;

WHEREAS, in the course of employment with
the Employer, Employee has had and will continue to have access to certain
confidential information that relates to or will relate to the business of the
Employer and its affiliates; and

WHEREAS, the Employer desires that any such
information not be disclosed to other parties or otherwise used for
unauthorized purposes.

NOW, THEREFORE, in consideration of
the mutual covenants and promises contained herein, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged,
the parties agree as follows:

1.                                       Employment.

(a)                                  Employer
shall employ Employee on the terms hereinafter set forth.  Employee shall be employed as Executive Vice
Chairman of Employer during the Term. 
Employee shall perform such duties as may be prescribed for such office
in the Constitution and Rules of Employer, and those consistent with the office
of Executive Vice Chairman that may be assigned to him from time to time by the
Chief Executive Officer and Chairman of the Board of Directors (“Board”) of
Employer.

(b)                                 Employee
agrees to devote his full business time and efforts to the affairs of Employer
and to the performance of his duties as its Executive Vice Chairman.  In doing so, he agrees to conduct himself at
all times in a manner consistent with the excellent reputation of Employer.

(c)                                  Employee
agrees not to accept any membership on the board of directors of any private or
public corporation without the prior written approval of the Board.  The Board will grant such approval if, in its
discretion, such membership will present no

conflict of interest or
interference with Employee’s duties as Executive Vice Chairman of Employer.

2.                                       Term
and Severance Payment.  This
Agreement shall commence on the Effective Date and shall expire on
December 31, 2008 (the “Initial Term”), unless terminated earlier pursuant
to the provisions of Sections 5, 6, 7 or 8.  The term of employment shall be renewed
automatically for successive periods of one (1) year each (a “Renewal Term”)
after the expiration of the Initial Term, unless Employer provides Employee, or
Employee provides Employer, with written notice to the contrary at least one
hundred eighty (180) days prior to the end of the Initial Term or any Renewal
Term.  The Initial Term and the Renewal
Terms are collectively referred to herein as the “Term.”  If either Employer or Employee elect not to renew
the Term of this Agreement in accordance with this Section 2 and Employee
thereafter continues in employment with Employer, Employee shall be employed on
an at-will basis and the terms of such employment and any subsequent
termination of employment shall be subject solely to the general employment
practices and policies of Employer.

3.                                       Compensation.  Employer shall pay to Employee for all
services to be performed by Employee during the Term:

(a)                                  A
Base Salary at the rate of $600,000 per annum. Base Salary shall be payable in
substantially equal regular installments in accordance with Employer’s
practices for other senior executives, as such practices may be determined from
time to time.  The Compensation Committee
of the Board (“Committee”) shall review the rate of Base Salary in such manner
and at such time as is applicable to other senior executives.  In no event shall Employee’s Base Salary be
decreased below the Base Salary in effect as of the Effective Date.

(b)                                 In
addition to the aforementioned annual Base Salary, Employee shall be eligible
to participate in any bonus or incentive program applicable to other senior
executives of Employer, other than the Chairman and the Chief Executive
Officer, during the Term.  Any bonus or
incentive payment for a fiscal year of Employer shall be payable to Employee as
soon as practicable after the end of such year, and in any event no later than
April 1 of the year immediately following the year in which it was earned.

(c)                                  Upon
Employer’s adoption of a stock option or similar equity incentive plan,
Employer shall grant Employee options to purchase shares of its common stock in
amounts and subject to such terms as determined by the Board in its sole
discretion.

(d)                                 All
payments of Base Salary and bonus or incentive payment or severance payment, if
any, shall be subject to such deductions as may be required to be made pursuant
to law, government regulation or order, or by agreement with, or consent of,
Employee.

4.                                       Additional
Benefits.

(a)                                  Membership
and Business Expenses.  Employer will
pay or promptly reimburse Employee for all the following:

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(i)                                     all
initiation fees, annual dues and membership expenses in one country club
selected and joined by Employee in which membership is useful for or necessary
to the performance of Employee’s duties hereunder, and all reasonable expenses
incurred in furtherance of, or in connection with the transaction of, the
business of Employer hereunder at such country club;

(ii)                                  all
reasonable initiation fees, annual dues and membership expenses in one civic or
lunch club selected by Employee in which membership is useful or necessary to
the performance of Employee’s duties hereunder, and all reasonable expenses
incurred in furtherance of, or in connection with the transaction of, the
business of Employer hereunder at such civic or lunch club; and

(iii)                               all
reasonable business expenses incurred by Employee in the performance of his
duties during the Term.

All amounts subject to reimbursement by Employer to
Employee pursuant to this paragraph (a) shall be subject to an accounting
by Employee and approval by Employer.

(b)                                 Benefit
Plans.  During the Term, Employee
shall be entitled to participate in, and receive benefits under, (i) any
qualified or supplemental retirement, savings or deferred compensation plan,
program or arrangement currently made available by Employer for its senior
executives, and (ii) any such additional or substitute plan, program or
arrangement that Employer may make available in the future and during the Term
for its senior executives (“Benefit Plans”), subject to and on a basis
consistent with the terms, conditions and overall administration of each such
Benefit Plan.  The amount of any lump sum
severance payment payable to Employee pursuant to any provision of this Agreement
shall be deemed compensation for purposes of any such Benefit Plan; provided,
however, that the amount of any such lump sum severance payment shall be deemed
compensation for purposes of any tax-qualified Benefit Plan only to the extent
permitted by the terms of such Benefit Plan and by applicable provisions of the
Internal Revenue Code of 1986, as amended, and regulations issued thereunder.

(c)                                  Vacations
and Holidays.  Employee shall be
entitled to five weeks paid vacation during each calendar year commencing
during the Term.  Employee shall also be
entitled to all paid holidays given by Employer to its other senior executives.

(d)                                 Insurance
Benefits.  During the Term, Employee
and his dependents shall be entitled to participate in, and receive benefits under,
(i) any health and dental plan, disability plan, accidental death and
dismemberment plan, survivor income plan, and life insurance plan or
arrangement currently made available by Employer for its senior executives, and
(ii) any such additional or substitute plan or arrangement that Employer
may make available in the future and during the Term for its senior executives
(“Insurance Plans”), subject to and on a basis consistent with the terms,
conditions, and overall administration of each such Insurance Plan.

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(e)                                  Professional
Services.  Employee shall be entitled
to reimbursement from Employer for his expenses for professional services,
including legal, accounting and investment advice, relating to his negotiations
for employment and preparation of this Agreement, continued employment with
Employer and the performance of duties and reporting obligations related to his
employment with Employer, and management of personal finances, income tax
advice, and estate planning advice.  The
total reimbursable amount hereunder for each calendar year commencing or ending
during the Term shall not exceed the aggregate of (i) $10,000, plus (ii) an
amount equal to the excess of $10,000 over the amount reimbursed hereunder for
any preceding calendar year that is not reimbursed in any other preceding
calendar year.

(f)                                    Parking.  Employer shall provide, without charge, a
reserved automobile parking space for the exclusive use of Employee.  Such parking space is being provided at the
request of Employer to facilitate the services rendered by Employee to Employer
hereunder.

5.                                       Termination.

(a)                                  Termination
For Cause.  The Board, by vote of a
majority of its members, may terminate the employment of Employee with Employer
at any time during the Term for “Cause”. 
For purposes of this Agreement, “Cause” shall be deemed to exist if, and
only if:

(i)                                     Employee
shall engage, during the performance of his duties hereunder, in acts or
omissions constituting dishonesty, intentional breach of fiduciary obligation
or intentional wrongdoing or malfeasance which result in material harm to
Employer;

(ii)                                  Employee
shall intentionally disobey or disregard a lawful and proper direction of the
Board or Employer;

(iii)                               Employee
shall materially breach this Agreement, and such breach by its nature, is
incapable of being cured, or such breach remains uncured for more than
30 days following receipt by Employee of written notice from Employer
specifying the nature of the breach and demanding the cure thereof.  For purposes of this clause (iii), a
material breach of this Agreement which involves inattention by Employee to his
duties under this Agreement shall be deemed a breach capable of cure; or

(iv)                              The
Securities and Exchange Commission, the Employer or another regulatory or law
enforcement authority institutes regulatory or law enforcement proceedings
against the Employee or a firm with which the Employee previously was
associated, which proceedings (regardless of the underlying merits) the
Employer believes in its sole discretion could be detrimental to the Employer
or its reputation.

Without limiting the generality of the foregoing, the
following shall not constitute Cause for termination of Employee or the
modification or diminution of any of his 

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authority hereunder: 
(i) any personal or policy disagreement between Employee and
Employer, or any member of Employer or its Board; or (ii) any action taken
by Employee in connection with his duties hereunder or any failure to act, if
Employee acted or failed to act in good faith and in a manner Employee reasonably
believed to be in, and not opposed to, the best interest of Employer, and
Employee has no reasonable cause to believe his conduct was unlawful.

Notwithstanding anything herein to the contrary, if
Employer shall terminate the employment of Employee hereunder for Cause,
Employer shall give at least 30 days prior written notice to Employee
specifying in detail the reason or reasons for Employee’s termination.  If the employment of Employee is terminated
by Employer for Cause, Employee’s accrued but unpaid Base Salary (based upon
the annual rate in effect on the date of termination), shall be paid to
Employee through the date of his termination, and, except as otherwise provided
in any Benefit Plan or Insurance Plan, Employer shall have no further obligation,
including any obligation for severance payments, to Employee under this
Agreement.  Such termination shall have
no effect upon Employee’s rights under the Benefit Plans, the Insurance Plans
and other employee policies and practices of Employer applicable to such
termination.

(b)                                 Termination
Without Cause.  The Board, by vote of
a majority of its members, may terminate the employment of Employee without
Cause, at any time during the Term, as of a date at least 30 days after
the date a written notice of such termination is delivered by Employer to
Employee.  In such event, Employer shall
pay to Employee (i) his accrued but unpaid Base Salary (based upon the
annual rate in effect on the date of termination) through the date of
termination, (ii) a pro-rated Bonus equal to the Employee’s annual target Bonus
for the calendar year in which Employee’s employment terminates multiplied by a
fraction, the numerator of which shall equal the number of calendar days
Employee was employed by Employer for the year in which his employment
terminates and the denominator of which shall equal 365 (the “Pro-Rated Bonus”),
and (iii) within 30 days following the date of such termination, a
lump sum cash severance payment in an amount equal to the sum of (A) two
times Employee’s annual rate of Base Salary in effect on the date of
termination and (B) two times the target bonus for the year in which
Employee’s employment is terminated (such Base Salary and bonus payment to be
referred to herein as the “Salary and Bonus Payment”).  Employer shall also pay Employee’s COBRA
premiums (or an amount equal to Employee’s COBRA premiums) (sufficient to cover
full family health care) for a period of eighteen (18) months following the
termination of his employment if Employee elects such COBRA coverage and, at
the end of such period, if Employee is eligible and elects to enroll in
Employer’s retiree medical plan, if any, Employer shall pay Employee’s premiums
for such coverage for a period of six (6) months.  The foregoing notwithstanding, Employer’s
obligation to pay the COBRA and retiree medical insurance premiums described in
the preceding sentence (collectively, the “Insurance Premiums”) shall cease on
the date Employee becomes eligible for coverage under another group health plan
that does not impose pre-existing condition limitations on Employee’s
coverage.  Nothing herein shall be
construed to extend the period of time over which COBRA continuation coverage
may be provided to Employee or his dependents beyond that mandated by law.  (The Salary and Bonus Payment and the
Insurance Premiums described in this Section

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5(b) shall be referred to
herein collectively as the “Severance Benefits”.)  Subject to Section 12 of this Agreement, the
Salary and Bonus Payment shall be paid within thirty days following the
termination of Employee’s employment; provided, however, that if Employee is a “specified
employee” as such term is defined under Section 409A of the Code and the
regulations and guidance promulgated thereunder, the payment of the Severance
Benefits shall be delayed by a period of six (6) months following Employee’s
separation of employment if necessary to ensure such payments are not subject
to the penalties and interest under Section 409A of the Code.

(c)                                  Voluntary
Termination for Good Reason. 
Employee may terminate his employment at any time during the Term for “Good
Reason” as of a date at least 30 days after the date a written notice of
such termination is delivered by Employee to Employer.  For purposes of this Agreement,  “Good Reason” shall be deemed to exist if,
and only if, without Employee’s express written consent:

(i)                                     Employer
shall assign to Employee duties or responsibilities that are inconsistent in
any material and adverse respect with Employee’s current duties, responsibilities,
or status with Employer (including any material and adverse diminution of such
duties or responsibilities), or a material and adverse change in the officer
titles Employee holds with Employer;

(ii)                                  Employer
shall reduce the Base Salary of Employee, or materially reduce his fringe
benefits and perquisites;

(iii)                               Employer
shall require Employee to relocate his principal business office or his
principal place of residence outside the Chicago metropolitan area, or assign
to Employee duties that would reasonably require such relocation; or

(iv)                              Employer
shall terminate, reduce or limit Employee’s participation in any bonus or
incentive arrangement, Benefit Plan or Insurance Plan relative to the level of
participation of other senior executives of similar rank, based upon an
arbitrary decision of Employer rather than a decision reasonably related to the
level of job performance of Employee, and only to such an extent as to
materially reduce the aggregate value of Employee’s incentive compensation and
benefits below their aggregate value as of the date hereof.

A termination of Employee’s employment for Good Reason
shall be effectuated by giving Employer written notice of the termination
within sixty (60) days of the event constituting Good Reason, setting forth in
reasonable detail the specific conduct of Employer that constitutes Good Reason
and the specific provisions of this Agreement on which Employee relies.  Notwithstanding anything herein to the
contrary, if Employee shall terminate his employment for Good Reason, Employer
shall pay to Employee his accrued but unpaid Base Salary (based upon the annual
rate in effect on the date of termination or the date immediately prior to
Employer’s actions described in subsections (ii) and (iv) above, whichever is
greater) through the date of termination, the Pro-Rated Bonus and the Severance
Benefits on the same terms and subject to the same conditions as described in
Paragraph 5(b).

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(d)                                 Voluntary
Termination without Good Reason. 
Employee may terminate his employment without Good Reason at any time
during the Term as of a date at least 30 days after the date a written
notice of such termination is delivered by Employee to Employer.  If the employment of Employee is terminated
by Employee without Good Reason, Employee’s accrued but unpaid Base Salary
(based upon the annual rate in effect on the date of termination), shall be
paid to Employee through the date of his termination, and, except as otherwise
provided in any Benefit Plan or Insurance Plan, Employer shall have no further
obligation, including any obligation for Severance Benefits, to Employee under
this Agreement.  Such termination shall
have no effect upon Employee’s rights under the Benefit Plans, the Insurance
Plans and other employee policies and practices of Employer applicable to such
termination.

6.                                       Death.  If Employee dies during the Term, Employer
shall pay (i) Employee’s Base Salary (based on the annual rate in effect
on the date of death) through the date of death, (ii) the Pro-Rated Bonus, and
(iii) within 30 days following the date of death, the Salary and
Bonus Payment to his beneficiary last designated by written instrument
delivered by Employee to Employer prior to the date of death.  If no such designated beneficiary shall
survive Employee, such amount shall be paid to Employee’s surviving spouse, or
if none, to his lawful descendants per stirpes
then living, or if none shall survive him, to the legal representative of his
estate, or if none is appointed within six (6) months of the date of his death,
to his heirs at law under the laws of the state in which he is domiciled at the
date of his death.  Any death benefit
payable under this Section 6 is in addition to any other benefits due to
Employee’s beneficiaries or dependents from Employer, under any Benefit Plan or
Insurance Plan.  Except as otherwise
provided in this Section 6, or in any Benefit Plan or Insurance Plan,
Employer shall have no further obligations with respect to Employee or his
beneficiaries or dependents under this Agreement following the date of his
death.

7.                                       Disability.

(a)                                  If
Employee is “Permanently Disabled” for a continuous period of six
(6) months during the Term, Employer may terminate Employee’s employment
under this Agreement upon 30 days prior written notice to Employee.   In such event Employer shall pay to Employee
(i) his accrued but unpaid Base Salary (based on the annual rate in effect
on the date of termination) through the date of termination, (ii) the Pro-Rated
Bonus, and (iii) within 30 days following the date of such
termination, the Salary and Bonus Payment. 
The payment of the Salary and Bonus Payment shall be conditioned upon
Employee’s execution of the Release as described in Section 12 of this
Agreement.

(b)                                 For
purposes of this Agreement, the term Permanently Disabled shall have the
meaning set forth in the long-term disability policy or plan maintained
by Employer for its senior executives then in effect, provided that the
definition of a Permanent Disability applied under such a policy or plan is
consistent with the definition of disability or disabled under Section 409A of
the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations
and guidance promulgated thereunder.  In
the absence of such a policy or plan, disability or disabled shall have the
meaning ascribed to such terms under Section 409A of the Code and the
regulations and guidance promulgated thereunder.

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(c)                                  Except
as otherwise provided in this Section 7, and in any Benefit Plan or
Insurance Plan of Employer, Employer shall have no further obligation to
Employee under this Agreement following the date of his disability.  Such termination shall have no effect upon
Employee’s rights under the Benefit Plans, the Insurance Plans and other
employee policies and practices of Employer applicable to such termination.

8.                                       Change
in Control.  If during the eighteen
(18) month period following a Change in Control that occurs during the Term of
the Agreement (i) Employee is terminated by Employer or a successor employer
without Cause or (ii) Employee terminates his employment with Employer for Good
Reason, and in lieu of any payments to which Employee may otherwise be entitled
under Section 5, Employee shall be paid (i) his accrued but unpaid Base Salary
(based upon the annual rate in effect on the date of termination) through the
date of termination, (ii) the Pro-Rated Bonus, and (iii) a lump sum severance
payment in an amount equal to the sum of (A) three times Employee’s annual
rate of Base Salary in effect on the date of termination and (B) three
times the target bonus for the year in which Employee’s employment is
terminated (the “Sale Payment”).  The
Sale Payment shall be payable on the same terms and subject to the same
conditions as described in Section 5(b) of this Agreement for the Salary and
Bonus Payment.  In addition, Employee
shall be entitled to the Insurance Premiums on the same terms and subject to
the same conditions as described in Section 5(b) of this Agreement; provided,
however, that Employer’s obligation to reimburse any retiree medical premiums
shall be for a period of eighteen (18) months instead of six (6) months,
subject to earlier termination on the terms as described in Section 5(b).  For purposes of this Agreement, a “Change in
Control” of Employer shall be deemed to occur on the effective time of
(i) a merger or consolidation of Employer with one or more other
corporations as a result of which holders of the outstanding capital stock of
Employer entitled to vote for the election of directors (“Voting Stock”) of
Employer immediately prior to such merger hold less than 50% of the Voting
Stock of the surviving or resulting corporation, or (ii) a transfer of
substantially all of the property of Employer other than to an entity of which
Employer owns at least 50% of the Voting Stock.

9.                                       Restrictive
Covenant.  During the period of his
employment and for a period of two years following a termination of Employee’s
employment pursuant to Section 5(a)(i), 5(a)(ii), 5(a)(iii), 5(b), 5(c),
5(d), 7 or 8, the Employee shall not:

(a)                                  singly,
jointly, or in any other capacity, directly or beneficially, manage, join,
participate in the management, operation or control of, or work for (as an
employee, consultant or independent contractor), or permit the use of his name
by, or provide financial or other assistance to, or be connected in any manner
with, any securities or futures exchange, alternative trading system or
electronic communications network (including any derivatives market) providing
for the trading of securities or futures derivatives, located in the United
States or any other country, or any affiliate thereof, without the express
written approval of the Chief Executive Officer and Chairman of the Board of
Employer;

(b)                                 provide
any service or assistance which (1) is of the general type of service or
assistance provided by Employee to Employer, (2) relates to any
technology, account, product, project or piece of work, with which Employee was
involved during his

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employment with Employer,
and (3) contributes to causing an entity to come within the definition
described in paragraph (a) above;

(c)                                  solicit
or accept if offered to him, with or without solicitation, on his own behalf or
on behalf of any other person, the services of any person who is a then current
employee of Employer (or was an employee of Employer during the year preceding
such solicitation), nor solicit any of Employer’s then current employees (or an
individual who was employed by or engaged by Employer during the year preceding
such solicitation) to terminate employment or an engagement with Employer, nor
agree to hire any then current employee (or an individual who was an employee
of Employer during the year preceding such hire) of Employer into employment
with himself or any company, individual or other entity; or

(d)                                 directly
or indirectly divert or attempt to divert from Employer any business in which
Employer has been actively engaged during the term hereof, nor interfere with
the relationships of Employer with its sources of business.

10.                                 Confidentiality.  Employee acknowledges that Employer may
disclose secret or confidential information to Employee during the Term to
enable him to perform his duties hereunder. 
Employee agrees that, subject to the following sentence, he shall not
during the Term (except in connection with the proper performance of his duties
hereunder) and thereafter, without the prior written consent of Employer,
disclose to any person or entity any material or significant secret or
confidential information concerning the business of Employer that was obtained
by Employee in the course of his employment by Employer.  This paragraph shall not be applicable if and
to the extent Employee is required to testify in a legislative, judicial or
regulatory proceeding pursuant to an order of Congress, any state or local
legislature, a judge, or an administrative law judge, or if such secret or
confidential information is required to be disclosed by Employee by any law,
regulation or order of any court or regulatory commission, department or
agency.  Employee further agrees that if
his employment by Employer is terminated for any reason, he will not take with
him, but will leave with Employer, all records and papers and all matter of
whatever nature that bears secret or confidential information of Employer.  For purposes of this Agreement, the term “secret
or confidential information” shall include, but not be limited to, any and all
records, notes, memoranda, data, writings, research, personnel information,
customer information, clearing members’ information, Employer’s financial
information and plans, processes, methods, techniques, systems, formulas,
patents, models, devices, compilations or any other information of whatever
nature in the possession or control of Employer, that has not been published or
disclosed to the general public,  the
options industry or the commodities futures industry; provided that such term
shall not include knowledge, skills, and information that is common to the
trade or profession of Employee.

11.                                 Remedies.  Employee consents and agrees that if he
violates any provisions of Sections 9 or 10 of this Agreement,
Employer or its successors in interest shall be entitled, in addition to any
other remedies that they may have, including money damages, to an injunction to
be issued by a court of competent jurisdiction, restraining him from committing
or continuing any violation of Sections 9 or 10.

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If,
at any time, Employee violates, to any material extent, any of the covenants or
agreements set forth in Sections 9 or 10 of this Agreement, Employer
shall have the right to terminate the employment of Employee for Cause in
accordance with the provisions of paragraph (a) of Section 5.

In
the event that Employee is found to have breached any provision set forth in
Section 9 of this Agreement, the time period provided for in that
provision shall be deemed tolled (i.e.,
it will not begin to run) for so long as Employee was in violation of that
provision.

12.                                 Release.  Notwithstanding anything herein to the
contrary, as a condition to receiving severance payments under this Agreement
following the termination of Employee’s employment with Employer, Employee
agrees to execute a release of claims in substantially the form attached hereto
as Exhibit A (the “Release”).

13.                                 Assignment.  Neither Employee nor Employer may assign this
Agreement, except that Employer’s obligations hereunder shall be binding legal
obligations of any successor to all or substantially all of Employer’s business
by purchase, merger, consolidation, or otherwise.

14.                                 Employee
Assignment.  No interest of Employee
or his spouse, dependent or any other beneficiary under this Agreement, or any
right to receive any payment or distribution hereunder, shall be subject in any
manner to sale, transfer, assignment, pledge, attachment, garnishment, or other
alienation or encumbrance of any kind, nor may such interest or right to
receive a payment or distribution be taken, voluntarily or involuntarily, for
the satisfaction of the obligations or debts of, or other claims against,
Employee or his spouse, dependent or any other beneficiary, including claims
for alimony, support, separate maintenance, and claims in bankruptcy proceedings.

15.                                 Benefits
Unfunded.  (i) All rights of
Employee and his spouse, dependent or any other beneficiary under this
Agreement shall at all times be entirely unfunded and no provision shall at any
time be made with respect to segregating any assets of Employer for payment of
any amounts due hereunder; (ii) neither Employee nor his spouse, dependent
or any other beneficiary shall have any interest in or rights against any
specific assets of Employer; and (iii) Employee and his spouse, dependent
or any other beneficiary shall have only the rights of a general unsecured
creditor of Employer.

16.                                 Waiver.  No waiver by either party at any time of any
breach by the other party of, or compliance with, any condition or provision of
this Agreement to be performed by the other party shall be deemed a waiver of
any other provisions or conditions at the same time or at any prior or
subsequent time.

17.                                 Applicable
Law.  This Agreement shall be
construed and interpreted pursuant to the internal laws of the State of
Illinois, without regard to principles of conflicts of laws.

18.                                 Entire
Agreement.  This Agreement contains
the entire agreement between Employer and Employee, and supersedes any and all
other previous agreements, written or oral, between the parties relating to the
subject matter hereof.  No amendment or
modification of the

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terms of this Agreement shall be binding upon either
of the parties hereto unless reduced to writing and signed by each of the
parties hereto.

19.                                 Counterparts.  This Agreement may be executed in
counterparts, each of which shall be deemed an original.

20.                                 Severability.  The parties agree that this Agreement shall
be construed in a way to make each of its provisions enforceable, but that the
unenforceability of one or more provisions in one or more instances will not
make invalid the entire Agreement or any other provisions of this Agreement as
all of its provisions are severable.  In
the event a provision may be unenforceable as written, the parties agree that
it shall be partially enforced to the extent permitted by law.  The unenforceability of a provision in one
instance shall not affect its enforceability in other instances.

21.                                 Compliance.  It is intended that any amount payable under
this Agreement will comply with Section 409A of the Code, and regulations and
guidance relating thereto, so as not to subject Employee to the payment of any
interest and tax penalty which may be imposed under Section 409A of the Code,
provided, however, that Employer shall not be responsible for any such interest
and tax penalties.  If any provision of
this Agreement needs to be revised to satisfy the requirements of Section 409A
of the Code, then such provision shall be modified or restricted to the extent
and in the manner necessary to be in compliance with such requirements of the
Code.

22.                                 Successors.  This Agreement shall be binding upon, and
inure to the benefit of, the parties hereto and their respective heirs,
representatives and successors.

23.                                 Notices.  Notices required under this Agreement shall
be in writing and sent by personal delivery, or by registered U.S. mail, return
receipt requested, to the following addresses, or to such other address as the
party being notified may have previously furnished to the other by written
notice:

If to
Employer:

Chicago Board Options
Exchange

400 S. LaSalle Street

Chicago, Illinois  60605

Attention:              Chief
Executive Officer and

                                                                     Chairman
of the Board

If to Employee:

Edward Tilly

                                                                      

24.                                 Indemnity.  Employer shall indemnify, protect, defend and
save Employee harmless from and against any threatened, pending, contemplated
or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative, in which Employee is made a

 11
 

party by reason of the fact that Employee is an
officer, employee or agent of Employer, or any judgment, amount paid in
settlement (with the consent of Employer), fine, loss, expense, cost, damage
and reasonable attorneys’ fees incurred by reason of the fact that Employee is
an officer, employee or agent of Employer; provided, however, that Employee
acted in good faith and in a manner he reasonably believed to be in the best
interests of Employer, and with respect to any criminal action or proceeding,
had no reasonable cause to believe his conduct was unlawful.  Employer, at its expense, shall have the
right to purchase and maintain insurance or fidelity bonds on behalf of
Employee against any liability asserted against him and incurred by him in his
capacity as an officer, employee or agent of Employer.  Employee shall also be indemnified under
Employer’s Articles of Incorporation and By-Laws, and covered by
directors’ and officers’ liability insurance policies that are the same as or
equivalent to those Employer currently carries for its other executives.

25.                                 Headings.  The headings contained herein are for
reference purposes only and shall not in any way affect the meaning or
interpretation of any provision of this Agreement.

 12
 

IN
WITNESS WHEREOF, Employee has hereunto set his hand, and
Employer has caused these presents to be executed in its name on its behalf,
all as of the date first above written.

	
   

  	
  Chicago Board Options
  Exchange

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ William J. Brodsky

  
	
   

  	
   

  	
  William J. Brodsky

  
	
   

  	
   

  	
  Title:

  	
  Chief Executive Officer and

  
	
   

  	
   

  	
  Chairman of the
  Board of Directors

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  /s/ Edward Tilly

  
	
   

  	
  Edward Tilly

  
					

 

 13

Exhibit
A

RELEASE
OF CLAIMS

THIS
RELEASE OF CLAIMS (“Release”) is made and entered into this          
day of                   ,
200  , to be effective as of                                   
(the “Effective Date”), by and between CHICAGO BOARD OPTIONS EXCHANGE,
INCORPORATED, a Delaware corporation (“CBOE”), and EDWARD TILLY, a resident of
the State of Illinois (“Tilly”)

1.               In
consideration of CBOE’s payment to Tilly of the severance pay and benefits
described in the Amended and Restated Employment Agreement by and between CBOE
and Tilly (the “Employment Agreement”), to which Tilly is not otherwise
entitled and the sufficiency of which Tilly acknowledges, Tilly does hereby
fully, finally and unconditionally release and forever discharge CBOE and CBOE’s
former and current officers, directors, employees, members, representatives and
agents and all of their respective predecessors, successors, and assigns
(collectively “Released Parties”), in their personal, corporate and
representative capacities, from any and all rights, claims, liabilities,
obligations, damages, costs, expenses, attorneys’ fees, suits, actions, and
demands, of any and every kind, nature and character, known or unknown,
liquidated or unliquidated, absolute or contingent, in law and in equity,
enforceable or arising under any local, state or federal common law, statute or
ordinance relating to Tilly’s past employment with CBOE or any past actions,
statements, or omissions of CBOE or any of the Released Parties occurring prior
to Tilly’s execution of this Release, including but not limited to all claims
for defamation, wrongful termination, back pay and benefits, pain and
suffering, negligent or intentional infliction of emotional distress, breach of
contract, and interference with contractual relations, tort claims, employment
discrimination claims, and all claims arising under the Age Discrimination in
Employment Act of 1967, as amended (“ADEA”), Title VII of the Civil Rights Act
of 1964, as amended, the Civil Rights Act of 1866, as amended by the Civil
Rights Act of 1991 (42 U.S.C. § 1981), the Family and Medical Leave Act, the
Equal Pay Act, the Fair Labor Standards Act, the Americans with Disabilities
Act, the Older Workers Benefit Protection Act, the Illinois Human Rights Act,
the Workers Adjustment and Retraining Act, and the Chicago and Cook County
Human Rights Ordinances, and any other statutory, contract, implied contract,
or common law claim arising out of or involving Tilly’s employment, the
termination of Tilly’s employment, or any continuing effects of Tilly’s
employment with CBOE.

2.               Tilly
agrees not to sue CBOE or any of the Released Parties with respect to rights
and claims covered by this Release. If any government agency or court assumes
jurisdiction of any charge, complaint, or cause of action covered by this
Release, Tilly will not seek and will not accept any personal equitable or
monetary relief in connection with such investigation, action, suit, or legal
proceeding.

3.               Tilly
has forty-five (45) days (until                     )
within which to consider this Release, although Tilly may accept it at any time
within those forty-five (45) days. Once Tilly has signed this Release, Tilly
will still have seven (7) days in which to revoke his acceptance of the ADEA
portion of the Release by notifying CBOE, and specifically, Deborah Woods,
Human Resources Department. The ADEA portion of the Release will not be
effective or enforceable until the seven (7) day revocation period has expired.
If the ADEA portion of the

 A-1
 

Release is
revoked, the remainder of this Release shall remain in full force and effect as
to all of its terms except for the release of claims under the ADEA, and CBOE
will have three (3) business days to rescind the entire Release by so notifying
Tilly.

4.               Tilly
agrees that he will continue to be governed by those obligations arising under
Paragraphs 9,10 and 11 of the Employment Agreement, which are incorporated by
reference herein, shall not be released, shall be unaffected hereby, and shall
remain in full force and effect.

5.               This
Release shall be binding upon and inure to the benefit of CBOE and its
successors and assigns and Tilly and his heirs, executors and administrators.

6.               This
Release shall be construed and interpreted under the laws of the State of
Illinois to the extent not preempted by applicable laws of the United States.

	
  Dated:

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
  Edward Tilly

  
	
   

  	
   

  
	
   

  	
   

  
	
  Dated:

  	
   

  	
   

  	
  CHICAGO BOARD OPTIONS EXCHANGE

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
  By:

  	
   

  
							

 

 A-2EXHIBIT
10.18

January 1, 2007

Alan J. Dean
8037 West 174th Place
Tinley Park, IL  60477

Dear Alan,

This Amended and Restated
Letter of Agreement (“Agreement”) serves to amend and restate the Letter of
Agreement previously entered into between you and CBOE, dated December 1,
2005 (the “Prior Agreement”).  This
Agreement is not a contract of employment and should not be relied upon as
such.  As an employee of CBOE, you have
the right to voluntarily terminate your employment at any time for any reason
or no reason at all, and likewise, CBOE may terminate your employment at any
time for any reason or no reason at all and without prior notice.

1)              Termination
Without Cause:  CBOE may terminate
your employment without Cause, at any time. 
In such event, CBOE shall pay you (a) your base salary (based upon
the annual rate in effect on the date of termination) and prorated targeted
bonus through the date of termination; (b) twenty-four (24) months of base
salary continuation (at the rate determined by using the greater of (1) the
annual pay rate in effect on the effective date of this Agreement or (2) the
annual pay rate in effect on the date of termination of this Agreement); and
(c) an amount equal to two (2) times your target annual bonus (as
determined by the Board of Directors of CBOE) for the year in which your
employment terminates (collectively, such base salary and bonus amounts to be
referred to herein as the “Severance Payments”).  Subject to the terms of Paragraph 8 of this
Agreement, the Severance Payments shall be payable in one single sum.  CBOE shall also pay your COBRA premiums
(sufficient to cover full family healthcare) for a period of eighteen (18)
months following the termination of your employment if you elect such COBRA
coverage and, at the end of such period, if you are eligible and elect to
enroll in CBOE’s retiree medical plan, if any, CBOE shall pay your premiums for
such coverage for a period of six (6) months. 
The foregoing notwithstanding, CBOE’s obligation to pay the COBRA and
retiree medical insurance premiums described in the preceding sentence
(collectively, the “Insurance Premiums”) shall cease on the date you and your
dependents become eligible for coverage under another group health plan that
does not impose pre-existing condition limitations on your and your dependents’
coverage.  Nothing herein shall be
construed to extend the period of time over which COBRA continuation coverage
may be provided to you or your dependents beyond the period of time mandated by
law.  CBOE shall also pay you for your
unpaid business expenses incurred prior to the termination of your employment
in accordance with the terms

of CBOE’s expense
reimbursement policy, and accrued but unused vacation, through the date your
employment terminates, and any other benefits mandated under the terms of any
CBOE plans and programs in which you are a participant (excluding, however, any
other CBOE severance plan or program).

2)              Voluntary
Termination for Good Reason:  You may
terminate your employment at any time during the term of this Agreement for “Good
Reason”, such termination to be effective as of a date at least 30 days after
the date a written notice of such termination is delivered by you to CBOE.  For purposes of this Agreement, “Good Reason”
shall be deemed to exist if, and only if, without your express written consent:

a.               CBOE shall assign
to you duties or responsibilities that are inconsistent in any material and
adverse respect with your current duties, responsibilities or status with CBOE
(including any material and adverse diminution of such duties or
responsibilities) or a material and adverse change in the officer titles you
hold with CBOE;

b.              CBOE shall reduce
your base salary, or materially reduce your fringe benefits and perquisites;

c.               CBOE shall require
you to relocate your principal business office or your principal place of
residence more than thirty (30) miles from 400 S. LaSalle Street, Chicago,
Illinois, or assign to you duties that would reasonably require such
relocation; or

d.              CBOE shall
terminate, reduce or limit your participation in any bonus or incentive
arrangement, benefit plan or insurance plan relative to the level of
participation of other senior executives of similar rank, based upon an
arbitrary decision of CBOE rather than a decision reasonably related to the
level of your job performance, and only to such an extent as to materially
reduce the aggregate value of your incentive compensation and benefits below
their aggregate value as of the date hereof.

A termination of your employment for Good Reason shall be effectuated
by giving CBOE written notice of the termination within sixty (60) days of the
event constituting Good Reason, setting forth in reasonable detail the specific
conduct of CBOE constituting Good Reason. 
Notwithstanding anything herein to the contrary, if you terminate your
employment for Good Reason, CBOE shall pay to you (i) your base salary (based
upon the annual rate in effect on the date of termination) and prorated
targeted bonus through the date of termination and (ii) the Severance Payments
and Insurance Premiums on the same terms and subject to the same conditions as
described in Paragraph 1.

3)              Termination For
Cause:  CBOE may terminate your
employment for “Cause” at any time.  If
CBOE terminates your employment for cause, the Severance Payments and Insurance
Premiums will not be payable but
CBOE shall (1) reimburse you for your business expenses incurred but not paid
prior to the date of termination in accordance with CBOE’s expense

 2
 

reimbursement policy; and
(2) pay you your base salary earned through the date of termination, your
accrued but unused vacation through the date of termination and accrued but
unpaid bonuses earned in any year prior to the year in which your employment
terminates, and any other benefits mandated under the terms of any CBOE plans
or programs in which you are a participant. 
For purposes of this agreement, “Cause” shall be deemed to exist if, and
only if:

a.               During the
performance of your duties, you are found to, in either a judicial or quasi-judicial
proceeding as the case may be, after all rights of appeal have been exhausted
or waived, have committed any deliberate act(s) or omission(s) constituting
dishonesty, intentional breach of fiduciary obligation, or intentional
wrongdoing or malfeasance which result in material harm to CBOE.  The determination of material harm to CBOE
shall be based on definite proof and not mere allegations, conjecture, or
remote possibilities; or

b.              You willfully fail
to obey or refuse to comply with a lawful and proper direction of the Board or
CBOE’s Chief Executive Officer or Chief Operating Officer, which direction is
consistent with normal business practices and relates to your performance of
your duties as Executive Vice President and which failure to obey or refusal to
comply shall remain uncured for thirty (30) days after you have received
written notice specifying the failure to obey or refusal to comply and
affording you an opportunity to be heard in connection therewith, and you
either failed to remedy such failure to obey or refusal to comply within thirty
(30) days from receipt of such written notice or failed to take all reasonable
steps to that end during such thirty (30) day period and thereafter.

4)              Change In Control:  If there is a Change in Control at anytime
during the Term of this Letter Agreement and your employment is terminated by
CBOE or a successor employer without Cause at any time within the twelve (12)
month period following such Change in Control, or you terminate your employment
for Good Reason at any time within the twelve (12) month period following such
Change in Control, you will be entitled to the Severance Payments and the
Insurance Payments on the terms and subject to the same conditions as described
in Paragraph 1.  For purposes of this
Agreement, a “Change in Control” of CBOE shall be deemed to occur on the
effective time of (i) a merger or consolidation of (or similar form of
transaction) CBOE with one or more other corporations as a result of which
holders of the outstanding capital stock of CBOE entitled to vote for the
election of directors (“Voting Stock”) of CBOE immediately prior to such merger
hold less than 50% of the Voting Stock of the surviving or resulting
corporation, or (ii) a transfer of substantially all of the property of CBOE
other than to an entity of which CBOE owns at least 50% of the Voting Stock.

5)              Successors;
Binding Agreement; Entire Agreement: 
This Agreement shall not be terminated by any business combination.  In the event of any business combination, the
provisions of this Agreement shall be binding upon the surviving corporation
(and the parent corporation, if any), and such surviving corporation (and the
parent corporation, if any) shall be treated as CBOE hereunder.  This Agreement shall, upon its effective
date, supersede any and all other 

 3
 

agreements, either oral
or in writing, between the parties hereto, with respect to the subject matter
hereof, including, but not limited to, the Prior Agreement.  No change or modification of this Agreement
shall be valid unless in writing and signed by you and CBOE.

6)              Indemnification:  In accordance with CBOE’s Constitution,
Section 9.1, to the fullest extent permitted by law, CBOE will indemnify you
against all expenses (including attorneys’ fee), judgment, fines and amounts
paid in settlement actually and reasonably incurred by you in connection with
any action, suit, or proceeding that you are a party to by reason of the fact
that you are an officer of CBOE or arising in any way out of the performance of
your duties as an employee of CBOE. This indemnification will be paid on an “as-you-go”
basis and not in arrears and shall survive your employment at CBOE.  You will have the right to choose and employ
your own counsel.  The foregoing shall in
no way be construed as limiting the stated rights and protections provided to
you by CBOE Constitution Article IX.

7)                 Confidentiality:  CBOE and you hereby agree to use your best
efforts to maintain in confidence the existence of this Agreement, the contents
and terms of this Agreement, and the consideration for this Agreement (“Severance
and Change In Control Information”). 
CBOE and you hereby agree to take every reasonable precaution to prevent
disclosure of any Severance and Change In Control Information to third parties,
and each of us agrees that we will not seek publicity concerning (1) any
Severance and Change In Control Information or (2) any and all disputes,
claims, complaints, grievances, charges, actions, petitions and demands that
CBOE and you may have against each other that arise or are in any way related
to your employment with CBOE or your termination of employment by CBOE.  CBOE and you hereby agree to take every
precaution to disclose Severance and Change In Control Information only to
those employees, officers, directors, attorneys, accountants, governmental
entities, and family members who have a reasonable need to know of such
Severance and Change In Control Information.

8)                 Release:  As a condition to receiving Severance
Payments and Insurance Premiums under this Agreement you agree to execute a
release of claims (in a form substantially similar to the form set forth in
Attachment 1 which is attached hereto and made a part hereof).  Upon CBOE’s receipt of your executed release
of claims, and upon the expiration of any revocation period provided therein,
CBOE shall promptly pay your Severance Payments and commence payment of the
Insurance Premiums.  Notwithstanding the
foregoing or anything herein to the contrary, if you are or become a “specified
employee” as such term is defined under Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the regulations and guidance
promulgated thereunder, the payment of the Severance Payments and Premiums
shall be delayed by a period of six (6) months following your separation of
employment if necessary to ensure that such payments are not subject to the
penalties and interest under Section 409A of the Code. The payments, if any,
made hereunder shall be subject to such deductions as may be required to be
made pursuant to law, government regulation or order, or by your consent.  All rights of this Agreement shall at all
times be entirely unfunded and no provision shall at any time be made with
respect to segregating any assets of CBOE for payment of any amounts due
hereunder.

 4
 

9)                 Term.  This Agreement becomes effective on
January 1, 2007 and except as otherwise provided for in this Agreement,
shall expire on the earlier of your date of termination or December 31,
2008 (“Initial Term”).  The Initial Term
of the Agreement shall be renewed automatically for successive periods of one
(1) year each after the expiration of the Initial Term (a “Renewal Term”) and
any subsequent Renewal Term, unless you provide CBOE, or CBOE provides you,
with written notice to the contrary at least one hundred eighty (180) days
prior to the end of the Initial Term or any Renewal Term.  The Initial Term and any Renewal Terms are
collectively referred to herein as the “Term.”

10)           Compliance.   It is intended that any amount payable under
this Agreement will comply with Section 409A of the Code, and the regulations
and guidance relating thereto, so as not to subject you to the payment of any
interest and tax penalty which may be imposed under Section 409A of the Code,
provided, however, that CBOE shall not be responsible for any such interest and
tax penalties.

11)           Governing Law.   This Agreement shall be governed by, and
construed in accordance with, the laws of the State of Illinois, without
reference to its conflict of law provisions.

	
  /s/ Edward J. Joyce

  	
   

  	
  January 1, 2007

  	
   

  
	
  Edward J. Joyce

  	
   

  	
  Date

  
	
  President &
  Chief Operating Officer

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
  /s/ Alan J. Dean

  	
   

  	
  January 1, 2007

  	
   

  
	
  Alan J. Dean

  	
   

  	
  Date

  
	
  Executive Vice
  President

  	
   

  	
   

  

 

 5

ATTACHMENT 1

RELEASE OF CLAIMS

THIS RELEASE OF CLAIMS (“Release”) is made and entered into this          day
of         , 200  , to
be effective as of                             (the
“Effective Date”), by and between CHICAGO BOARD OPTIONS EXCHANGE, INCORPORATED,
a Delaware corporation (“CBOE”), and Alan J. Dean, a resident of the State of
Illinois (“Dean”)

1.               In consideration of CBOE’s agreement to
provide Alan J. Dean (“Dean”) with the severance pay and benefits, described in
the October     , 2006
Letter of Agreement by and between CBOE and Alan J. Dean (the “Letter
Agreement”), to which Dean is not otherwise entitled and the sufficiency of
which Dean acknowledges, Dean does hereby fully, finally and unconditionally
release and forever discharge CBOE and CBOE’s former and current officers,
directors, employees, members, representatives and agents and all of their
respective predecessors, successors, and assigns (collectively “Released
Parties”), in their personal, corporate and representative capacities, from any
and all rights, claims, liabilities, obligations, damages, costs, expenses,
attorneys’ fees, suits, actions, and demands, of any and every kind, nature and
character, known or unknown, liquidated or unliquidated, absolute or
contingent, in law and in equity, enforceable or arising under any local, state
or federal common law, statute or ordinance relating to your past employment
with CBOE or any past actions, statements, or omissions of CBOE or any of the
Released Parties occurring prior to your execution of this Agreement, including
but not limited to all claims for defamation, wrongful termination, back pay
and benefits, pain and suffering, negligent or intentional infliction of
emotional distress, breach of contract, and interference with contractual
relations, tort claims, employment discrimination claims, and all claims
arising under the Age Discrimination in Employment Act of 1967, as amended (“ADEA”),
Title VII of the Civil Rights Act of 1964, as amended, the Civil Rights Act of
1866, as amended by the Civil Rights Act of 1991 (42 U.S.C. § 1981), the Family
and Medical Leave Act, the Equal Pay Act, the Fair Labor Standards Act, the
Americans with Disabilities Act, the Older Workers Benefit Protection Act, the
Illinois Human Rights Act, the Workers Adjustment and Retraining Act, and the
Chicago and Cook County Human Rights Ordinances, and any other statutory,
contract, implied contract, or common law claim arising out of or involving
your employment, the termination of your employment, or any continuing effects
of your employment with CBOE.

2.               Dean agrees not to sue CBOE or any of the
Released Parties with respect to rights and claims covered by this release. If
any government agency or court assumes jurisdiction of any charge, complaint,
or cause of action covered by this release, Dean will not seek and will not
accept any personal equitable or monetary relief in connection with such
investigation, action, suit, or legal proceeding.

3.               Dean has forty-five (45) days (until                     )
within which to consider this Agreement, although Dean may accept it at any
time within those forty-five (45) days. Once Dean has signed this Agreement,
Dean will still have seven (7) days in which to revoke his acceptance of the
ADEA portion of the release by notifying CBOE, and specifically, Deborah Woods,
Human Resources Department. The ADEA portion of the release will not be
effective or enforceable until the seven (7) day revocation period has expired.
If the ADEA portion of the Release is revoked, the remainder of this Release
shall remain in full force and effect as to all of its terms except for the
release of claims under the ADEA, and CBOE will have three (3) business days to
rescind the entire Release by so notifying the Employee.

4.               Dean agrees that he will continue to be
governed by those obligations arising under Paragraph 7 of the Letter
Agreement, which is incorporated by reference herein, shall not be released,
shall be unaffected hereby, and shall remain in full force and effect.

5.               This Release shall be binding upon and inure
to the benefit of CBOE and its successors and assigns and Dean and his heirs,
executors and administrators.

6.               This Release shall be construed and
interpreted under the laws of the State of Illinois to the extent not preempted
by applicable laws of the United States.

By signing this Agreement, Dean acknowledges and understands that this
release does not imply that CBOE has done anything unlawful or wrong.

	
  

  	
   

  	
   

  	
   

  
	
  Edward J. Joyce –
  President & Chief Operating Officer

  	
   

  	
  Date

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
  Alan J. Dean

  	
   

  	
  Date

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