Document:

<PAGE>

                                                           Exhibit 10.12
                                               Chicago Mercantile Exchange Inc.
                                              Registration Statement on Form S-4

                             EMPLOYMENT AGREEMENT
                             --------------------

     This Employment Agreement ("Agreement") is entered into by and between the
CHICAGO MERCANTILE EXCHANGE ("CME") and WILLIAM JENKS ("Jenks") this 17/th/ day
of July, 1998.

               WHEREAS, the parties desire to enter into this Agreement
pertaining to the employment of Jenks by the CME.

     NOW, THEREFORE, in consideration of the mutual promises and covenants set
forth below, the parties hereby agree as follows:

     1. Employment. Subject to the terms of this Agreement, the CME hereby
agrees to employ Jenks during the Agreement Term as Executive Vice President,
Management Information Systems, ("MIS"), and Jenks hereby accepts such
employment. Jenks shall report directly to the Executive Vice President, Chief
Operating Officer ("EVP/COO") of the CME. As Executive Vice President of MIS,
Jenks shall have overall responsibility for the MIS division and such other
duties as may be assigned to him by the EVP/COO, President or Board of Directors
of the CME. These duties may be changed from time-to-time as determined by the
EVP/COO, President or Board of Directors of the CME, provided that any such
duties shall be consistent with the position of Executive Vice President, MIS.
During his employment, Jenks agrees to devote his full time, energies and
talents to serving as Executive Vice President, MIS, of the CME, and to perform
his duties faithfully, efficiently and in good faith, subject to the direction
of the EVP/COO and/or President and/or Board of Directors of the CME.

     2. Agreement Term. The Agreement Term shall be for a term ending on June
30, 2000. Unless renewed by the mutual written agreement of the parties, this
Agreement will automatically terminate upon the expiration of the Agreement
Term. The CME will give Jenks written notice of its intention to renew or not
renew or to renegotiate the terms of the Agreement
<PAGE>

at least sixty (60) days prior to expiration. In the absence of renewal, upon
expiration of this Agreement, Jenks shall be an employee of the CME working
without a contract.

     3.    Compensation. During the Agreement Term and while employed by the
CME, the CME shall compensate Jenks as follows:

     a.    Base Salary. Jenks shall be paid an annual base salary of Two
hundred fifty thousand dollars ($250,000.00), payable in equal bi-weekly
installments. Annual increases, if any, shall be as determined by the CME in
accordance with its policies and practices with respect to executive
compensation.

     b.   Benefits. Subject to their terms, Jenks and any of his eligible
dependents shall be entitled to participate in all fringe benefits and benefit
plans of the CME under the same terms and conditions as are generally applicable
to the employees and officers of the CME as those fringe benefits and benefit
plans currently exist and/or as they may be amended from time to time during the
Agreement Term.

     c.   Bonus. Subject to its terms, Jenks shall participate in the CME's
discretionary bonus program.

     4.   Termination. Jenks's employment with the CME during the Agreement Term
may be terminated only under the following circumstances:

     a.   Death. Jenks's employment hereunder will terminate upon his death.

     b.   Disability. If Jenks is disabled, and received benefits under the
CME's long term disability insurance program, the obligations under this
Agreement shall be suspended for the duration of such disability. In the event
Jenks returns to the position set forth herein during the term of this
Agreement, the provisions of this Agreement shall be reinstated. In the event
Jenks returns to work in a different position, or does not return to work at all
upon conclusion of his disability, this Agreement shall be deemed terminated.
<PAGE>

     c.   Cause. Jenks's employment hereunder may be immediately terminated by
the CME for cause. For purposes of this Agreement, "cause" shall be defined as
misconduct, incompetence, failure to perform and/or neglect of duties which is
gross or willful, and shall include actions by Jenks which occur outside of the
CME which would have a substantial likelihood of bringing significant discredit
upon the CME.

     d.   Termination by Jenks. This Agreement may be terminated by Jenks at any
time and for any reason by the giving of at least sixty (60) days advance
written notice of same to the CME.

     5.   Payments Upon Termination or Expiration.

     a.   In the event of termination of Jenks pursuant to Paragraphs 4a or 4b
of this Agreement, the CME shall for a period of six (6) months following such
termination continue Jenks's base salary (or pay same to his estate).

     b.   In the event of termination of Jenks by the CME pursuant to Paragraph
4c of this Agreement, or upon expiration of the Agreement Term, the CME shall
pay to Jenks only any accrued, but unused, vacation pay.

     c.   In the event Jenks terminates this Agreement pursuant to Paragraph 4d
herein with less than the sixty (60) days advance written notice of same, the
parties acknowledge that the CME will be damaged thereby, but that such damages
will be difficult to calculate. Accordingly, Jenks will promptly pay to the CME,
or allow set off against any monies it may then owe to Jenks, as liquidated
damages a sum equal to his base salary, computed daily, for each day his notice
of termination under Paragraph 4d is less than sixty (60) days.

     6.   Confidentialty. Jenks acknowledges that in his employment he is or
will be making use of, acquiring or adding to the CME's Confidential Information
which includes (but is not limited to) memoranda and other materials or records
of a proprietary nature; technical data,
<PAGE>

records and policy matters relating to new business development, research,
strategy, finance, accounting, marketing, personnel, clearing, management, and
operations. Therefore, in order to protect such Confidential Information and to
protect other employees who depend on the CME for regular employment, Jenks
agrees that he will not during or after the term of his employment in any way
utilize any of said Confidential Information, except in connection with his
employment by the CME, and he will not copy, reproduce, or take with him the
original or any copies of said Confidential Information and he will not disclose
any of said Confidential Information to anyone. Further, Jenks agrees to advise
any new employer of the terms of this Agreement regarding Confidential
Information. These restrictions regarding Confidential Information shall be in
addition to those which exist at common law or by statute.

     7.   Arbitration; Equitable Remedies.

     Any controversy or claim arising out of or relating to this Agreement or
the validity, interpretation, enforceability or breach thereof, which is not
settled by agreement of the parties, shall be settled by arbitration conducted
in the City of Chicago, in accordance with the Rules of the American Arbitration
Association, and judgment upon the award rendered in such arbitration may be
entered in any court having jurisdiction. The arbitration shall be conducted
before a single arbitrator selected by the parties. In the event the parties
cannot agree on an arbitrator, then the Association will supply both parties
with a list of seven names. The parties will alternatively strike one name until
only one remains. First choice will be determined by a coin toss, the winning
party having the option of striking first. All expenses of arbitration shall be
borne equally by the parties, except for attorneys' fees which shall be borne
entirely by each party. The arbitrator shall have no power to amend, alter, add
to or delete from this Agreement.

     Jenks acknowledges that the CME would be irreparably injured by a violation
of Paragraph 6 and he agrees that the CME, in addition to any other remedies
available to it for
<PAGE>

such breach or threatened breach, shall be entitled to a preliminary injunction,
temporary restraining order, or other equivalent relief, restraining Jenks from
any actual or threatened breach of Paragraph 6 pending and in aid of arbitration
of the dispute. If a bond is required to be posted in order for the CME to
secure an injunction or other equitable remedy, the parties agree that such bond
need not be more than a nominal sum.

     8.   Return of Property. Upon his last day of active work, Jenks hereby
agrees to immediately turn over to the CME any keys, credit cards, passes, and
all notes, memoranda, records, documents, computer disks, and all other
information, no matter how produced or reproduced, kept by Jenks or in his
possession or control, used in or pertaining to the business of the CME, it
being hereby acknowledged that all of said items are the sole and exclusive
property of the CME.

     9.   Defense of Claims. During the period of his employment by the CME, and
for periods after the termination of his employment, Jenks shall reasonably
cooperate with the CME at its request in the defense or prosecution of any claim
that may be made by or against the CME. Such cooperation shall include, without
limitation, serving as a witness at trial or hearing, being deposed, and
preparation for same. For the period after Jenks terminates his employment with
the CME, the CME shall reimburse Jenks for all reasonable expenses in
connection therewith, including travel expenses, and shall compensate him at a
daily rate equal to his annual base salary on the date his employment with the
CME terminates, divided by 260, with days used for preparation, travel and other
related matters being included for purposes of determining the compensation due
to Jenks. Less than full days shall be paid for by the hour, determined by
dividing the daily rate by eight. To the extent reasonably practicable, the CME
shall provide Jenks with notice at least ten days prior to the date on which any
such travel is required.
<PAGE>

     10.  Nonalienation. The interests of Jenks under this Agreement are not
subject in any manner to anticipation, alienation, sale, transfer, assignment,
pledge, encumbrance, attachment, or garnishment by creditors of Jenks or Jenks's
beneficiaries.

     11.  Amendment. This Agreement may be amended or cancelled only by the
subsequent mutual written agreement of the parties.

     12.  Applicable Law. The provisions of this Agreement shall be construed in
accordance with the laws of the State of Illinois, without regard to the
conflict of law provisions of any state.

     13.  Waiver of Breach. No waiver of any party hereto of a breach of any
provision of this Agreement by any other party, or of compliance with any
condition or provision of this Agreement to be performed by such other party,
will operate or be construed as a waiver of any subsequent breach by such other
party or any similar or dissimilar provisions and conditions at the same or any
prior or subsequent time. The failure of any party hereto to take any action by
reason of such breach will not deprive such party of the right to take action at
any time while such breach continues.

     14.  Notices. Notices and all other communications provided for in this
Agreement shall be in writing and shall be delivered personally or sent by
registered or certified mail, return receipt requested, postage prepaid, or sent
by facsimile or prepaid overnight courier to the parties at, respectively, the
business address of the CME in care of its President and the home address of
Jenks (or to Jenks at the business address of the CME if Jenks is employed there
at the time of such notice). Such notices and other communications shall be
deemed given:

     a.   in the case of delivery by overnight service with guaranteed next day
delivery, the next day or the day designated for delivery;

     b.   in the case of certified or registered U.S. mail, five days after
deposit in the U.S. mail; or
<PAGE>

     c.   in the case of facsimile, the date upon which the transmitting party
received confirmation of receipt by facsimile, telephone or otherwise; provided,
however, that in no event shall any such communications be deemed to be given
later than the date they are actually received.

     15.  Severability. If any provision, section, subsection or other portion
of this Agreement shall be determined by any court of competent jurisdiction to
be invalid, illegal or unenforceable in whole or in part, and such determination
shall become final, such provision of portion shall be deemed to be severed or
limited, but only to the extent required to render the remaining provisions and
portions of this Agreement enforceable. This Agreement as thus amended shall be
enforced so as to give effect to the intention of the parties insofar as that is
possible. In addition, the parties hereby expressly empower a court of competent
jurisdiction to modify any term or provision of this Agreement to the extent
necessary to comply with existing law and to enforce this Agreement as modified.

     16.  Survival of Agreement; Successors. Except as otherwise expressly
provided in this Agreement, the rights and obligations of the parties to this
Agreement shall survive the termination of Jenks's employment with the CME. In
the event of a merger, sale, reorganization or other change of control, this
Agreement shall be binding upon and inure to the benefit of any successor of the
CME.

     17.  Entire Agreement. This Agreement constitutes the entire agreement
between the parties concerning the subject matter hereof and supersedes all
prior and contemporaneous agreements, if any, between the parties relating to
the subject matter hereof.

     18.  Counterparts. This Agreement may be signed in multiple counterparts,
each of which shall be deemed to be an original for all purposes.
<PAGE>

     19.  Acknowledgement by Jenks. Jenks represents that he is knowledgeable
and sophisticated as to business matters, including the subject matter of this
Agreement, that he has read this Agreement and that he understands its terms.
Jenks acknowledges that, prior to assenting to the terms of this Agreement, he
has been given a reasonable time to review it, to consult with counsel of his
choice, and to negotiate at arm's length with the CME as to the contents. Jenks
and the CME agree that the language used in this Agreement is the language
chosen by the parties to express their mutual intent, and that no rule of strict
construction is to be applied against any party hereto.

     IN WITNESS WHEREOF, the parties have executed this Agreement on the date(s)
set forth below.

                                    CHICAGO MERCANTILE EXCHANGE

                                    By /s/ Gerald J. Beyer
                                       ----------------------
                                    Title  EVP/COO
                                           ------------------
                                    Date  7-13-98
                                         --------------------

                                    /s/ William Jenks
                                    -------------------------
                                    William Jenks

                                    Date  7-20-98
                                         --------------------<PAGE>

                                               Exhibit 10.14
                                               Chicago Mercantile Exchange, Inc.
                                              Registration Statement on Form S-4

                                     LEASE
                                     -----

     THIS LEASE, made as of this 11th day of November, 1983 by and between the
CME Real Estate Co. of Chicago, Illinois, an Illinois corporation (hereinafter
known as "Landlord") and the Chicago Mercantile Exchange, an Illinois not-for-
profit corporation (hereinafter known as "Tenant" or "CME").

                                  WITNESSETH:

     THAT Landlord hereby leases to Tenant, and Tenant accepts the demised
premises (hereinafter known as "demised premises" or "premises"), being The Main
Trading Floor; Main Trading Hall; Main Trading Hall Interstitial Space;
Expansion Trading Hall; and Expansion Trading Hall Interstitial Space in the
building (hereinafter known as the "Chicago mercantile Exchange Center"), at 30
South Wacker Drive, Chicago, Illinois, for the term of Fifteen (15) Years,
unless sooner terminated as provided herein, commencing on the Commencement Date
(defined in Section 2) and ending on the last day of the calendar month
preceeding the calendar month of commencement, 15 years thereafter ("Termination
Date"), to be occupied and used by Tenant for the trading floor facility of the
Chicago Mercantile Exchange (and other uses associated therewith) and no other
purpose, subject to the agreements herein contained.

     IN CONSIDERATION THEREOF, THE PARTIES COVENANT AND AGREE:

     1. BASE RENT:

        A. Tenant shall pay as Base Rent to the Landlord (or its successor or
assignee) at 222 South Riverside Plaza, Chicago, Illinois, or to such other
person or such other place as the Landlord may direct in writing, the Base Rent
of TEN MILLION, FIVE HUNDRED TWENTY-ONE THOUSAND, NINE HUNDRED AND NO/HUNDREDTHS

<PAGE>

DOLLARS ($10,521,900.00) in one hundred eighty (180) equal monthly installments
of FIFTY-EIGHT THOUSAND, FOUR HUNDRED FIFTY-FIVE AND NO/HUNDREDTHS DOLLARS
($58,455.00) in advance or before the first day of each and every calendar month
of the Term, except that the Tenant shall pay the first monthly installment upon
occupancy of the demised premises. Base Rent unpaid for thirty (30) days or
more, shall bear interest pursuant to Section 20(f) from the date due until
paid. Time is of the essence of this Lease.

     B. For each extended term, as provided in Section 23, the Base Rent shall
be adjusted as follows:

          (i)    First Extended Term: The Base Rent shall be FOUR MILLION, THREE
     HUNDRED SIXTY-EIGHT THOUSAND AND NO/HUNDREDTHS DOLLARS ($4,368,000.00)
     payable in eighty-four (84) equal monthly installments of FIFTY-TWO
     THOUSAND AND NO/HUNDREDTHS DOLLARS ($52,000.00).

          (ii)   Second Extended Term: The Base Rent shall be TWO MILLION, THREE
     HUNDRED NINETY-FOUR THOUSAND AND NO/HUNDREDTHS DOLLARS ($2,394,000.00)
     payable in eighty-four (84) equal monthly installments of TWENTY-EIGHT
     THOUSAND FIVE HUNDRED AND NO/HUNDREDTHS DOLLARS ($28,500.00

          (iii)  Third Extended Term: The Base Rent shall be SEVEN HUNDRED
     NINETY-EIGHT THOUSAND AND NO/HUNDREDTHS DOLLARS ($798,000.00) payable in
     eighty-four (84) equal monthly installments of NINE THOUSAND FIVE HUNDRED
     AND NO/HUNDREDTHS DOLLARS ($9,500.00).

          (iv)   Fourth Extended Term: The Base Rent shall be ONE HUNDRED SIXTY-
     EIGHT THOUSAND AND NO/HUNDREDTHS DOLLARS ($168,000.00) payable in eighty-
     four (84) equal monthly installments of TWO THOUSAND AND NO/HUNDREDTHS
     DOLLARS ($2,000.00).

                                      -2-

<PAGE>

2. RENT ADJUSTMENT: The Base Rent shall be adjusted in accordance with the
   provisions of this Section.

     A. For purposes of this Lease:

          (i)    "Trading Volume" means the actual number of contracts traded in
                 all commodities on the CME and its divisions each calendar
                 year.

          (ii)   "Base Year" means the calendar year in which the Threshold
                 Volume is fixed for purpose of the calculation of additional
                 rent. For purposes of this sub-section, the Base Year shall be
                 1988.

          (iii)  "Threshold Volume" is the level of Trading Volume at which the
                 Tenant will be liable for additional rent. It allows the
                 Landlord to participate in the growth of the CME.

                 For the Base Year, 1988, the annual Threshold Volume is fixed
                 at 50,000,000 contracts; every third year thereafter through
                 the end of the initial term, and through each extended term
                 thereof, the Threshold Volume will increase by 15,000,000
                 contracts.

          (iv)   "Excess Volume" means Trading Volume in excess of the
                 applicable Threshold Volume.

           (v)   "Additional Rent" means any amount owed by Tenant to
                 Landlord resulting from Excess Volume determined as follows:

           (1)   Commencing in the Base Year CME shall determine if there is
                 Excess Volume and, if such condition exists, then Tenant shall
                 be liable for Additional Rent determined by applying the rate
                 per contract (as set forth in 2A(v)(2) below), times the Excess
                 Volume. Such amount of Additional Rent shall be paid within
                 ninety (90) days of each calendar year for which it is due.

                                      -3-
<PAGE>

<TABLE>
<CAPTION>
               (2) Rate per Contract:

                    Total Trading Volume                    Rate
                    --------------------                   ------
                    <S>                                    <C>
                    Up to 100,000,000 contracts            $ .01
                    From 100,000,000 to 150,000,000          .008
                    From 150,000,000 to 200,000,000          .006
                    Excess of 200,000,000                    .004
</TABLE>

          (vi) "Leasehold Improvements" means any furnishings and/or equipment
     installed upon the premises by Tenant prior to, or contemplated and
     budgeted at, the time of commencement of this Lease. Such Leasehold
     Improvements shall inure to the benefit of Landlord, as hereinafter
     provided.

          (vii) "Non-Cash Rent" means any amount of rent owed by Tenant to
     Landlord as a result of the Leasehold Improvements inuring to the benefit
     of Landlord.

               (1) Tenant shall be liable for Non-Cash Rent in the amount of
          NINE MILLION, NINE HUNDRED SIXTY-SEVEN THOUSAND, THREE HUNDRED EIGHTY
          AND NO/HUNDREDTHS DOLLARS ($9,967,380.00) in six equal annual
          installments of ONE MILLION, SIX HUNDRED SIXTY-ONE THOUSAND, TWO
          HUNDRED THIRTY AND NO/HUNDREDTHS DOLLARS ($1,661,230.00).

               (2) Such amount shall be transferred and deemed paid on the first
          day of the calendar year beginning with the calendar year 1990 by
          transfer of a portion of the identified Leasehold Improvements set
          forth in 2A(vi) above.

          (viii) "ROI--Cash" means additional rent owed by Tenant which is the
     monetary equivalent to an imputed amount which Landlord would be otherwise
     entitled to "earn" on the Leasehold Improvements deemed transferred in
     2A(vii)(2) above, which amount has been determined and agreed as set forth
     below.

                                      -4-
<PAGE>

               (1) Beginning the first day of the calendar month of the Seventh
          (7th) anniversary of the commencement date and continuing through to
          the Termination Date of the initial term, Tenant shall be liable for
          ROI--Cash rent in the following amounts:

                     For the year beginning on: 7th Anniversary Date: ONE
               HUNDRED SIXTEEN THOUSAND, TWO HUNDRED EIGHTY-SIX AND
               NO/HUNDREDTHS DOLLARS ($116,286.00) in twelve (12) equal monthly
               installments of NINE THOUSAND, SIX HUNDRED NINETY AND
               50/HUNDREDTHS DOLLARS ($9,690.50).

                     8th Anniversary Date: TWO HUNDRED FORTY THOUSAND, SEVEN
               HUNDRED TWENTY AND NO/HUNDREDTHS DOLLARS ($240,720.00) in twelve
               (12) equal monthly installments of TWENTY THOUSAND SIXTY AND
               NO/HUNDREDTHS DOLLARS ($20,060.00).

                     9th Anniversary Date: THREE HUNDRED SEVENTY-THREE THOUSAND
               EIGHT HUNDRED FORTY EIGHT AND NO/HUNDREDTHS DOLLARS ($373,848.00)
               in twelve (12) equal monthly installments of THIRTY ONE THOUSAND
               ONE HUNDRED FIFTY-FOUR and NO/HUNDREDTHS DOLLARS ($31,154.00).

                     10th Anniversary Date: FIVE HUNDRED SIXTEEN THOUSAND, THREE
               HUNDRED AND NO/HUNDREDTHS DOLLARS ($516,300.00) in twelve (12)
               equal monthly installments of FORTY THREE THOUSAND TWENTY-FIVE
               AND NO/HUNDREDTHS DOLLARS ($43,025.00).

                     11th Anniversary Date: SIX HUNDRED SIXTY-EIGHT THOUSAND,
               SEVEN HUNDRED THIRTY-SIX AND NO/HUNDREDTHS DOLLARS ($668,736.00)
               in twelve (12) equal monthly installments of FIFTY FIVE THOUSAND,
               SEVEN HUNDRED TWENTY-EIGHT AND NO/HUNDREDTHS DOLLARS
               ($55,728.00).

                                      -5-
<PAGE>

                     12th Anniversary Date: EIGHT HUNDRED THIRTY-ONE THOUSAND,
               EIGHT HUNDRED TWENTY-EIGHT AND NO/HUNDREDTHS DOLLARS
               ($831,828.00) in twelve (12) equal monthly installments of SIXTY-
               NINE THOUSAND THREE HUNDRED NINETEEN AND NO/HUNDREDTHS DOLLARS
               ($69,319.00).

               For the two years beginning on:

                     13th Anniversary Date: TWO MILLION, ONE HUNDRED FIVE
               THOUSAND, ONE HUNDRED EIGHTY-FOUR AND NO/HUNDREDTHS DOLLARS
               ($2,105,184.00) in twenty four (24) equal monthly installments of
               EIGHTY-SEVEN THOUSAND, SEVEN HUNDRED SIXTEEN AND NO/HUNDREDTHS
               DOLLARS ($87,716.00), which represents a return of capital plus
               ROI--Cash.

               (2) For each extended term, as provided in Section 23, the ROI--
          Cash Rent and return of capital shall be adjusted as follows:

                     (a) First extended term: The ROI--Cash Rent shall be FIVE
               MILLION, SEVENTY-THREE THOUSAND, NINE HUNDRED THIRTY-SIX AND
               NO/HUNDREDTHS DOLLARS ($5,073,936.00) payable in eighty-four (84)
               equal monthly installments of SIXTY THOUSAND, FOUR HUNDRED FOUR
               AND NO/HUNDREDTHS DOLLARS ($60,404.00).

                     (b) Second extended term: TWO MILLION, SEVEN HUNDRED
               SEVENTY-TWO THOUSAND, THREE HUNDRED THIRTY-SIX AND NO/HUNDREDTHS
               DOLLARS ($2,772,336.00) payable in eighty-four (84) equal monthly
               installments of THIRTY-THREE THOUSAND FOUR AND NO/HUNDREDTHS
               DOLLARS ($33,004.00).

                     (c) Third extended term: ONE MILLION, NINE HUNDRED EIGHTY-
               THREE THOUSAND, FOUR HUNDRED EIGHT AND NO/HUNDREDTHS DOLLARS
               ($1,983,408.00) payable in eighty-four (84) equal monthly
               installments of TWENTY-THREE THOUSAND SIX HUNDRED TWELVE AND
               NO/HUNDREDTHS DOLLARS ($23,612.00).

                                      -6-
<PAGE>

                     (d) Fourth extended term: ONE MILLION, TWO HUNDRED TWENTY-
               FIVE THOUSAND, TWO HUNDRED TWENTY-FOUR AND NO/HUNDREDTHS DOLLARS
               ($1,225,224.00) payable in eighty-four equal monthly installments
               of FOURTEEN THOUSAND, FIVE HUNDRED EIGHTY-SIX AND NO/HUNDREDTHS
               DOLLARS ($14,586.00).

          (ix) "Commencement Date" means the first day that the Tenant occupies
     and uses such premises for the trading of commodity futures contracts
     consistent with Section 3 (USE).

          (x) "Termination Date" means the final day of the initial or any
    extended term hereof.

     B. Tenant shall, at its sole expense, be liable for all expenses and taxes
in connection with operation of the demised premises:

          (i) "Expenses" means and includes those expenses paid or incurred for
     maintaining, operating and repairing the premises or improvements thereto;
     the cost of electricity, steam, water, fuel, heating, lighting, air-
     conditioning, window cleaning, janitorial service, insurance, including but
     not limited to fire, extended coverage, liability, workmen's compensation,
     elevator, or any other insurance carried in good faith and applicable to
     the premises or improvements thereto, painting, uniforms, customary
     management fees, supplies, sundries, sales or use taxes on supplies or
     services, cost of wages and salaries of all persons engaged in the
     operation, maintenance, and repair of the premises or improvements thereto,
     and so-called fringe benefits, including social security taxes,
     unemployment insurance taxes, cost for providing coverage for disability
     benefits, cost of any expansions, hospitalization, welfare or retirement
     plans, or any other similar or like expenses incurred under the provisions
     of any collective bargaining agreement, or any other cost or expense which
     is paid or incurred to provide any independent contractor who, under
     contract with, does any of the work of operating, maintaining or repairing
     of the premises or improvements thereto, legal and accounting expenses,
     including, but not to

                                      -7-
<PAGE>

    be limited to, such expenses as relate to seeking or obtaining reductions in
    and refunds of Taxes, or any other expense or charge, whether or not
    hereinbefore mentioned, which in accordance with generally accepted
    accounting and management principles would be considered as an expense of
    maintaining, operating, or repairing the premises or improvements thereto.

      (ii) "Taxes" means real estate taxes, assessments, sewer rents, rates and
    charges, transit taxes, taxes based upon the receipt of rent, and any other
    federal, state or local governmental charge, general, special, ordinary or
    extraordinary (but not including income or franchise taxes or any other
    taxes imposed upon or measured by Landlord's income or profits, unless the
    same shall be imposed in lieu of real estate taxes), which may now or
    hereafter be levied or assessed against the premises or improvements
    thereto. In case of special taxes or assessments which may be payable in
    installments, only the amount of each installment paid during a calendar
    year shall be included in taxes for that year. Taxes shall also include any
    personal property taxes (attributable to the year in which paid) imposed
    upon the furniture, fixtures, machinery, equipment, apparatus, systems and
    appurtenances used in connection with the premises or improvements thereto
    for the operation thereof. The amount of Taxes attributable to any calendar
    year of the Lease term shall be the amount of Taxes payable in such year,
    notwithstanding that in each case the assessments for such Taxes may have
    been made for a different year or years than the year in which payable.

    C. Notwithstanding any provision hereunder, the maximum annual cash rental
expense (inclusive of Base Rent and Rent Adjustment, but excluding Non Cash
Rent), howsoever determined, shall not be in excess of the following:

<TABLE>
<CAPTION>
<S>                       <C>
Initial Term............. $3,000,000.00
First Extended Term...... $2,500,000.00
Second Extended Term..... $2,000,000.00
Third Extended Term...... $1,500,000.00
Fourth Extended Term..... $  750,000.00
</TABLE>

                                       8

<PAGE>

  3. USE: Tenant shall use and occupy the premises as a Commodity Exchange with
directly related functions thereto, and for no other purpose without prior
written consent of Landlord.

     A. Tenant will not make or permit to be made any use of the demised
premises which, directly or indirectly, is forbidden by public law, ordinance or
governmental regulation or which may be dangerous to persons or property, or
which may invalidate or increase the premium cost of any policy of insurance
carried on the building or covering its operations and Tenant shall not do, or
permit to be done, any act or thing upon the demised premises which will be in
conflict with fire insurance policies covering the building of which the demised
premises form a part. Tenant, at its sole expense shall comply with all rules,
regulations, or requirements of the Illinois Inspection and Rating Bureau, or
any other similar body, and shall not do, or permit anything to be done upon
said premises, or bring or keep anything thereon in violation of rules,
regulations or requirements of the Fire Department, Illinois Inspection and
Rating Bureau, Fire Insurance Rating Organization or other authority having
jurisdiction, and then only in such quantity and manner of storage as not to
increase the rate of fire insurance applicable to the building.

     B. Tenant assumes full responsibility for:

        (i) protecting the premises from theft, robbery and pilferage,

       (ii) keeping the premises secure, and

      (iii) locking the doors in and to the demised premises. Any damage
     resulting from neglect of this clause shall be paid for by Tenant. All
     property belonging to Tenant, or any person in the premises, which is in
     the building or the premises, shall be there at the risk of Tenant or other
     person only, and Landlord shall not be liable for damage thereto or theft
     or misappropriation thereof. Tenant shall indemnify and hold Landlord
     harmless from any claims arising out of the above, including subrogation
     claims by Tenant's insurance carrier, except that nothing contained herein
     shall require Tenant to release, indemnify, or waive claims against
     Landlord for liability caused by the gross negligence of Landlord.

                                       9

<PAGE>

  4. SERVICES:

    A. Tenant shall furnish at its own expense:

       (i) Air-cooling when necessary to provide a temperature condition
    required, in Tenant's judgment or required by law (or governmental
    regulation), for comfortable occupancy of the demised premises under normal
    business operation, daily from 6:00 A.M. to 6:00 P.M. (Saturdays 8:00 A.M.
    to 1:00 P.M.), Sundays and holidays excepted. Tenant will also furnish heat
    to the demised premises, when required by law (or governmental regulation),
    for comfortable occupancy of the demised premises under normal business
    operation on business days from 6:00 A.M. to 6:00 P.M. and on Saturdays from
    8:00 A.M. to 1:00 P.M., Sundays and holidays excepted.

      (ii) Tenant shall supply hot and cold water for use in lavatories it
    installs for use. If Tenant desires water in the demised premises, cold
    water only shall be supplied from City of Chicago mains drawn through a
    line, meter, and fixtures installed by Tenant, at Tenant's expense, with
    Landlord's written consent.

      (iii) Passenger elevator service to the Trading Floor and Expansion Floor
    daily from 6:00 A.M. to 6:00 P.M. (Saturdays to 1:00 P.M.), Sundays and
    holidays excepted.

      (iv) Tenant shall provide any janitorial services or cleaning at its sole
    expense, with Landlord's written consent and subject to supervision of
    Landlord and at Tenant's sole responsibility and by janitor or cleaning
    contracts or employees at all times satisfactory to Landlord.

    B. All electricity used in the demised premises shall be supplied by the
utility company serving the building through a separate meter and be paid for by
Tenant. Landlord shall not in any way be liable or responsible to Tenant for any
loss or damage or expense which Tenant may sustain or incur if either the
quantity or character of electric service is changed or is no longer available
or suitable for Tenant's requirements. If such service is discontinued, such
discontinuance shall not in any way affect this Lease or the liability of Tenant
hereunder. Tenant shall receive such service directly from the utility company
and Landlord hereby permits its wires and conduits, to the extent available,
suitable and safety capable, to be used for such purposes. Tenant shall make no
alterations or additions to the electrical equipment and/or appliances without
the prior written consent of Landlord in each instance.

                                      10

<PAGE>

Tenant covenants and agrees that at all times its use of electric current shall
never exceed the capacity of the feeders to the building or the risers or wiring
installation.

    C.  Tenant shall, at its sole expense, maintain in force during the Term,
  and all Renewal Terms:

        (i) Comprehensive General Liability Insurance on an occurrence basis
    with minimum limits of liability in an amount of $500,000 for bodily injury,
    personal injury or death to any one person, and $1,000,000 for bodily
    injury, personal injury or death to more than one person, and $100,000 with
    respect to damage to property, including water damage; and

       (ii) Fire Insurance, with extended coverage and vandalism and malicious
    mischief endorsements, in an amount adequate to cover the full replacement
    value of the demised premises and the Tenant's Leasehold Improvements paid
    for by Tenant; and all fixtures, contents, wall and floor coverings in the
    premises.

        All said insurance policies shall:

        (a) name Landlord, the beneficiary of the Landlord and its respective
    agents and employees (the "Additional Insureds", collectively) as Additional
    Insureds;

        (b) be issued by one or more responsible insurance companies reasonably
    satisfactory to Landlord;

        (c) not provide for deductible amounts of less than $1,000.00;

        (d) contain the following provisions and endorsements:

           (i) that such insurance may not be cancelled or amended without 60
           days' prior written notice to Landlord;

           (ii) an express waiver of any right of subrogation by the insurance
           company against the Additional Insureds; and

                                      11

<PAGE>

         (iii) that the policy shall not be invalidated should the insured waive
         in writing prior to a loss, any of all rights of recovery against any
         other party for losses covered by such policy.

       Tenant shall deliver to Landlord, certificates of insurance of all
    policies and renewals thereof to be maintained by Tenant hereunder, prior to
    the commencement date of the Term and not less than 10 days prior to the
    expiration date of each policy. Tenant hereby waives all rights of recovery
    which it might otherwise have against Landlord and the Additional Insureds,
    for loss or damage to person, property or business to the extent that same
    may be covered by valid and collectible insurance policies.

  6. POSSESSION: The demised premises shall be ready for occupancy and use on
such date as consistent with Tenant's general plan for moving its entire
operation to the building at 30 South Wacker Drive, Chicago, Illinois. Entry
into possession of the premises by Tenant shall be conclusive evidence that the
premises were in good and satisfactory condition at the time of such entry.

  If at the time Tenant takes possession there remains any work to be done on
the Trading Floor or Expansion Floor, by Landlord, such work shall be performed
expeditiously, in a workmanlike manner and shall not unreasonably interfere with
the conduct of Tenant's business. Nor will such work cause an abatement of rent.

  7. ALTERATIONS AND CONSTRUCTION: Tenant shall, at its sole expense, keep the
premises in good repair and tenantable condition during the Term, and Tenant
shall promptly arrange at Tenant's sole expense for the repair of all damages to
the premises (except for reasonable wear and tear and as otherwise provided in
this Lease) and the replacement or repair of all damaged or broken glass
(including signs thereon), fixtures and appurtenances within any reasonable
period of time. If Tenant does not promptly make such arrangements, Landlord
may, but need not, make such repairs and replacements and the amount paid by
Landlord for such repairs and

                                      12

<PAGE>

replacements shall be deemed additional rent reserved under this Lease due and
payable forthwith. Landlord may enter the premises at all reasonable times to
make such repairs or alterations, improvements and additions, as Landlord shall
desire or deem necessary for the safety, preservation or improvement of the
premises or the building, or as Landlord may be required to do by the City of
Chicago or by the order or decree of any court or by any other governmental
authority. Landlord shall make all extraordinary repairs required to maintain
premises in a tenantable condition.

  In the event Landlord or its agents or contractors shall elect or be required
to make repairs, alterations, improvements or additions to the premises or the
building, Landlord shall be allowed to take into and upon the premises all
material that may be required to make such repairs, alterations, improvements or
additions and, during the continuance of any of said work, to temporarily close
doors, entryways, public space and corridors in the building and to interrupt or
temporarily suspend building services and facilities without being deemed or
held guilty of eviction of Tenant or for damages to Tenant's property, business
or person, and the rent reserved herein shall in no way abate while said
repairs, alterations, improvements or additions are being made, and Tenant shall
not be entitled to maintain any set-off or counterclaim for damages of any kind
against Landlord by reason thereof. Landlord may, at its option, make all such
repairs, alterations, improvements or additions in and about the building and
the premises during ordinary business hours, but if Tenant desires to have the
same done at any other time, Tenant shall pay for all overtime and additional
expenses resulting therefrom provided that the same shall not unreasonably
interfere with the conduct of Tenant's business.

  8. FURNISHING AND EQUIPPING BUILDING: Tenant, upon completion of the premises,
shall, at its sole expense, furnish and equip the premises consistent with its
use (Section 3) as a commodity exchange in accordance with the plans and
specifications existing at the time of commencement of this Lease. Such
furnishings and equipment (herein "Leasehold Improvements") shall inure to the
benefit of Landlord in accordance with Section 2A(vii) (RENT

                                      13

<PAGE>

ADJUSTMENT). Additionally, such Leasehold Improvements shall be consistent with
maintaining a modern high-grade, first class building of the City of Chicago for
lease.

     9. ACCESS TO PREMISES: Tenant shall permit Landlord to erect, use and
maintain pipes, ducts, wiring and conduits in and through the demised premises.
Landlord or Landlord's agents shall have the right to enter upon the premises,
to inspect the same, to perform janitorial and cleaning services and to make
such repairs, alterations, improvements or additions to the premises or the
building as Landlord may deem necessary. Landlord shall be allowed to take all
material into and upon said demised premises that may be required therefore
without the same constituting an eviction of Tenant in whole or in part and the
Base Rent and/or Rent Adjustments shall in no wise abate while said repairs,
alterations, improvements, or additions are being made. In the event Landlord's
access to the premises or any part thereof pursuant to this section causes the
demised premises or any part thereof to be rendered untenantable or
inaccessible by Tenant for more than thirty (30) consecutive business days, then
Base Rent and Rent Adjustments shall abate on a per diem basis for each day
after such thirty (30) day period during which the premises or any part thereof
are not tenantable or accessible. Nothing herein contained, however, shall be
deemed or construed to impose upon Landlord any obligations, responsibility or
liability whatsoever, for the care, supervision or repair of the premises, or
any part thereof other than as herein provided. Landlord shall not be liable to
Tenant for any expense, injury, loss or damage resulting from work done in or
upon, or the use of, any adjacent or nearby building, land, street or alley.
Nothing contained herein shall require Tenant to release, indemnify, or waive
claims against Landlord for liability caused by the negligence of Landlord or
their respective agents, servants or employees.

     10. UNTENANTABILITY: If the demised premises or the building are made
untenantable by fire or other casualty, Landlord shall proceed with all due
diligence to repair, restore or rehabilitate the building or the demised
premises at Landlord's expense in which event this Lease shall not terminate. If
however, Landlord does not so contract or commence such reconstruction of the
premises, Landlord may elect:

                                     -14-

<PAGE>

     A. To terminate this Lease as of the date of the fire or casualty by notice
to Tenant within one hundred fifty (150) days after date, or

     B. Proceed with all due diligence to repair, restore or rehabilitate the
building or the demised premises at Landlord's expense, in which latter event
this Lease shall not terminate, provided, however, if Landlord fails to repair,
restore or rehabilitate the demised premises within 270 days after the
aforementioned 150 days, then Tenant shall have the right to terminate this
Lease as of the date of such fire or casualty by serving notice on Landlord
within ten (10) days after the expiration of the said 270 day period.

     In the event the Lease is not terminated pursuant to this provision, Base
Rent and Rent Adjustments shall abate on a per diem basis during the period of
untenantability. In the event of the termination of this Lease pursuant to this
section, Base Rent and Rent Adjustments shall be apportioned on a per diem basis
and paid to the date of the fire or other casualty. In the event that the
demised premises are partially damaged by fire or other casualty but not made
wholly untenantable, then Landlord shall, except during the last year of the
term hereof proceed with all due diligence to repair and restore the demised
premises and the Base Rent and Rent Adjustments shall abate in proportion to the
untenantability of the demised premises during the period of untenantability.
Notwithstanding anything hereinbefore contained in this section, if a portion of
the demised premises are made untenantable as aforesaid during the last year of
the term hereof, Landlord or Tenant shall have the right to terminate this Lease
as of the date of the fire or other casualty by giving written notice thereof to
the other within thirty (30) days after the date of the fire or other casualty,
in which event the Base Rent and Rent Adjustments shall be apportioned on a per
diem basis and paid to the date of such fire or other casualty.

     11. SUBROGATION: The parties hereto agree to use good faith efforts to have
any and all fire, extended coverage or any and all material damage insurance
which may be carried endorsed with the following subrogation clause: "This
insurance shall not be invalidated should the insured waive in writing prior to
a loss any

                                     -15-

<PAGE>

or all right of recovery against any party for loss occurring to the property
described herein"; and each party hereto hereby waives all claims for recovery
from the other party for any loss or damage to any of its property insured under
valid and collectible insurance policies to the extent of any recovery collected
under such insurance, subject to the limitation that this waiver shall apply
only when it is either permitted or, by the use of such good faith efforts could
have been so permitted by the applicable policy of insurance.

     12. EMINENT DOMAIN: If a substantial portion of the building, or a
substantial part of the demised premises, shall be lawfully taken or condemned
for any public or quasi-public use or purpose, or conveyed under threat of such
condemnation, the term of this Lease shall end upon, and not before, the date of
the taking of possession by the condemning authority, and without apportionment
of the award. Current rent shall be apportioned as of the date of such
termination. If any part of the building shall be so taken or condemned, or if
the grade of any street or alley adjacent to the building is changed by any
competent authority and such taking or change of grade makes it necessary or
desirable to demolish, substantially remodel, or restore the building, Landlord
shall have the right to cancel this Lease upon not less than ninety (90) days
notice prior to the date of cancellation designated in the notice. No money or
other consideration shall be payable by Landlord or Tenant for the right of
cancellation, and Tenant may not share in the condemnation award (or in any
judgment for damages caused by the change of grade). Tenant may proceed
independently in such proceedings if it chooses. If an insubstantial portion of
the premises shall be lawfully taken or condemned or conveyed under threat of
condemnation so that the premises can be used by Tenant for the purposes set
forth in this Lease, and this Lease is not terminated by Landlord, Landlord
shall repair the premises, and the Lease shall be amended to reduce Tenant's
Proportion and Base Rent in the proportion of the amount taken.

     13. ASSIGNMENT - SUBLETTING: Tenant may not sublet the demised premises nor
any part thereof, without prior written consent of Landlord. Neither shall
Tenant assign, nor hypothecate, nor mortgage, nor encumber, nor convey the
demised premises or any part thereof, without prior written consent of Landlord.

                                     -16-

<PAGE>

     14. ASSIGNMENT BY LANDLORD: All the rights herein given to Landlord may be
assigned, by operation of law or otherwise, in whole or in part, by Landlord
without the consent of Tenant. This section shall include any assignment of the
right to receive rent hereunder. Landlord shall be freed and relieved of all
covenants and obligations of Landlord under this Lease, upon any such assignment
or re-assignment provided that any such assignee shall agree to undertake such
obligations and covenants.

     15. CERTAIN RIGHTS RESERVED TO LANDLORD: Landlord reserves and may exercise
the following rights without affecting Tenant's obligations hereunder:

          A. To change the name or street address of the premises.

          B. To install and maintain a sign or signs on the exterior of the
     premises.

          C. To retain at all times pass keys to the demised premises.

          D. To close the premises after regular working hours and on the legal
     holidays subject, however, to Tenant's right to admittance, under such
     reasonable regulations as Landlord may prescribe from time to time; which
     may include by way of example but not of limitation, that persons entering
     or leaving the premises identify themselves to a watchman by registration
     or otherwise and that said persons establish their right to enter or leave
     the premises.

          E. To approve the weight, size and location of safes or other heavy
     equipment or articles, which articles may be moved in, about, or out of the
     premises only at such times and in such manner as Landlord shall direct and
     in all events, however, at Tenant's sole risk and responsibility.

          F. To take any and all measures, including inspections, repairs,
     alterations, additions and improvements to the premises as may be necessary
     for the safety, protection or preservation of the premises or the Real
     Property or Landlord's interests, or as may be necessary or desirable in
     the operation of the Real Property.

          Subject to Section 8 (ACCESS TO PREMISES), Landlord may enter upon the
     demised premises and may exercise any or all of the

                                     -17-

<PAGE>

foregoing rights hereby reserved without being deemed guilty of an eviction or
disturbance of Tenant's use or possession and without being liable in any manner
to Tenant and without abatement of Base Rent or Rent Adjustments or affecting
any of Tenant's obligations hereunder.

     16. DEFAULT AND DAMAGES: If at any time during the term or any extended
term thereof, of this Lease:

          A. All or any part of the Base Rent, Rent Adjustments, taxes,
     insurance premiums, charges, expenses, or other sums payable by Tenant
     shall be in arrears or unpaid and shall continue unpaid for a period of
     thirty (30) days after written notice is given thereof by Landlord to
     Tenant.

          B. Tenant shall fail to comply, in whole or in part, with any of the
     covenants, terms and conditions of this Lease other than payment of rent,
     and the same shall not be remedied within ninety (90) days after written
     notice thereof given by Landlord to Tenant, then Landlord, at its election,
     may (both in the case of default under 16A or B) without further or other
     demand and upon the giving of not less than twenty (20) days' prior written
     notice of such election to Tenant, terminate this Lease and this Lease
     shall thereupon be terminated without any right on the part of Tenant to
     prevent such termination by payment of any sum due or by performance of any
     provision of this Lease, or Landlord may elect to terminate Tenant's right
     to possession only, without terminating this Lease; in either of which
     events Tenant shall quit and peaceably surrender the demised premises and
     the building to Landlord, and Landlord, upon or at any time after either of
     such terminations, may, without further notice, re-enter thereon and
     repossess the same by summary proceedings or otherwise, and may dispossess
     Tenant and remove Tenant and all other persons and property from the
     demised premises without liability for any suit or action, civil or
     criminal, by reason thereof, and Landlord may have, hold and enjoy the
     demised premises and may alter the same as may be necessary effectively to
     utilize the premises and may have, hold and enjoy the right to

                                     -18-

<PAGE>

     premises and may have, hold and enjoy the right to receive all rental
     income therefrom without accountability to Tenant; and Landlord shall
     forthwith be entitled to recover from Tenant all rents and additional rents
     and all other sums of money or charges then matured and payable by Tenant;
     and (unless the statute or rule of law which governs or shall govern the
     proceeding in which such damages are to be proved limits or shall limit the
     amount of such claim capable of being so proved and allowed, in which case
     Landlord shall be entitled to prove as and for damages and have allowed an
     amount equal to the maximum allowed by or under any such statute or rule of
     law) Tenant shall also pay Landlord as damages for the failure to observe
     and perform all of the terms, covenants and conditions of this Lease to be
     observed or performed by Tenant, any costs and expenses incurred by
     Landlord in remedying Tenant's default including alteration of the premises
     as may be necessary effectively to utilize the premises and any deficiency
     between the rent and additional rent hereby reserved or covenanted to be
     paid and the net amount, if any, of the rents collected on account of this
     Lease of the demised premises for each month of the period which would
     otherwise have constituted the balance of the term of this Lease. In
     computing such damages there shall be added to the said deficiency such
     expenses as Landlord may incur in connection with re-letting, including,
     without limiting the generality of the foregoing, legal expenses,
     attorneys' fees, brokerage, the cost of keeping the demised premises in
     good order and the cost of preparing the same for re-letting. Any such
     damages and expenses shall be paid as and when incurred or expended by
     Landlord and any such deficiency shall be paid in monthly installments by
     Tenant on the rent day specified in this Lease and any suit brought to
     collect the amount of the deficiency for any month or months shall not
     prejudice in any way the rights of Landlord to collect the deficiency for
     any subsequent month by another proceeding. Landlord at its option may make
     such alterations, repairs and decorations in demised premises as Landlord
     in its sole judgment considers advisable or necessary for the purpose of
     re-letting demised premises, and the making of such alterations, repairs or
     decorations shall not operate or be construed to release Tenant from
     liability hereunder. Landlord shall in no event be liable in any way
     whatsoever for failure to

                                     -19-

<PAGE>

     re-let the demised premises or, in the event that demised premises are re-
     let, for failure to collect the rent therefor under such re-letting. No re-
     entry or re-letting shall be deemed to constitute acceptance of a surrender
     of this Lease or waiver of any of the rights reserved by Landlord
     hereunder, nor release Tenant from performance of any of the terms,
     covenants or conditions herein contained, unless Landlord shall
     specifically so notify Tenant in writing. Such re-letting shall not
     preclude Landlord from terminating this Lease as hereinabove provided at
     any time thereafter. Should Landlord at any time terminate this Lease for
     any breach, in addition to any other remedy that Landlord may have,
     Landlord may recover from Tenant all damages incurred by reason of such
     breach, including but not limited to the cost of recovering the demised
     premises and the worth, at the time of such termination, of the excess, if
     any, of the rent and charges equivalent to rent reserved in this Lease for
     the balance of the term hereof, or any shorter period of time, over the
     then reasonable rental value of the demised premises for the same period.
     In the event of a breach or threatened breach by Tenant of any of the
     terms, covenants or conditions hereof, Landlord shall have the right of
     injunction and the right to invoke any remedy allowed at law or in equity
     as if re-entry, summary proceedings and other remedies were not herein
     provided for. In no event shall Tenant be entitled to receive any excess of
     such annual rents over the sums payable by Tenant to Landlord hereunder.
     Nothing herein contained shall be deemed to require Landlord to postpone
     suit until the date when the term of this Lease would have expired if it
     had not been terminated under the provisions of this Lease, or under any
     provisions of law, or had Landlord not re-entered into or upon the demised
     area.

          C. In the event that Landlord is privileged to re-let the demised
     premises or any part or parts thereof pursuant to the provisions of
     paragraph B of this Section 16, Landlord may do so, either in the name of
     Landlord or otherwise, for a term or terms which may, at Landlord's option,
     be less than or exceed the period which would otherwise have constituted
     the balance of the term of this Lease, and Landlord may grant concessions
     or free rent if, in the reasonable exercise of Landlord's judgment, such
     action is advisable.

                                     -20-

<PAGE>

     D. Tenant, for itself, and any and all persons claiming through or under
Tenant, including its creditors, upon termination of this Lease and of the term
in accordance with the terms hereof, or in the event of entry of judgment for
the recovery of the possession of the demised area in any action proceeding, or
if Landlord shall enter the demised premises by process of law or otherwise,
hereby waives any right of redemption provided or permitted by any statute, law
or decision now or hereafter in force, and does hereby waive, surrender and give
up all rights or privileges which it or they may or might have under or by
reason of any present or future law or decision, to redeem the demised area or
for a continuation of this Lease for the term hereby demised. Tenant waives all
right to trial by jury in any summary or other judicial proceeding hereafter
instituted by Landlord against Tenant in respect of the demised premises.

     E. Additionally, Landlord shall have any other right or remedy granted or
permitted at law or in equity, to be exercised, upon the occurrence of a default
under this Lease in the payment of all or any rents and additional rents payable
by Tenant under the terms of this Lease (including any sums paid by Landlord
which are, as provided in this Lease, to be collectible as additional rent), and
the failure of Tenant to cure any such default within the ninety day and thirty
day grace periods specified in this Section 16.

     F. Tenant hereby expressly waives, to the extent permitted by law, service
of any notice to quit possession, or of intention to re-enter under the common
law or statutes or ordinances or rules or regulation of the State of Illinois or
of any municipality, court, agency, or other body in or of said State.

     G. The exercise by Landlord of any right or remedy against Tenant or the
demised premises or improvements shall not preclude the simultaneous or
successive exercise against Tenant or the demised premises or improvements of
other rights or remedies, whether or not inconsistent, herein provided for or
permitted by law or in equity. The failure of Landlord to

                                     -21-
<PAGE>

insist in any one or more instances upon strict performance of any of the
covenants or conditions of this Lease, or to exercise any option herein
conferred, shall not be construed as a waiver or relinquishment for the future
of any covenant, condition or option, but the same shall continue and remain in
full force and effect. A receipt and acceptance of performance of any covenant
or condition of this Lease, with or without knowledge of the breach of any
covenant or condition of this Lease, shall not be deemed a waiver of such
breach, nor shall any such acceptance of rent or other payment in a lesser
amount than is hereby provided for (regardless of any endorsement on any
negotiable instrument, or any statement in any letter accompanying such payment)
operate or be construed either as a payment on account of the first accruing
rents or other obligation hereunder then unpaid by Lessee. No waiver by Landlord
of any term, covenant or condition of this Lease shall be deemed to have been
made unless expressed in writing and signed by Landlord or its duly authorized
agent.

     H. A default in the payment of a sum of money shall not be deemed to be a
default that "cannot reasonably cured in thirty days."

17. HOLDING OVER: If Tenant retains possession of the demised premises, or any
part thereof, after the termination of the term or any extension thereof, by
lapse of time or otherwise, on the first day of each month Tenant so retains
possession Tenant shall pay Landlord the monthly Base Rent, double the rate
payable for the month immediately preceding said holding over. Tenant shall pay
Landlord all damages, consequential as well as direct, sustained by reason of
Tenant's retention of possession. The provisions of this paragraph do not
exclude Landlord's right of re-entry or any other richt hereunder.

18. SURRENDER OF POSSESSION: Upon the expiration or other termination of the
term of this Lease, or Tenant's right to possession hereunder, Tenant shall quit
and surrender to Landlord the premises, in good order and condition, ordinary
wear excepted.

19. NOTICES: Notices shall be in writing.

<PAGE>

     A. Notices shall be effectively served by Landlord upon Tenant in the
following manner:

     (i) By forwarding through certified or registered mail, postage prepaid, to
any or all members of the Executive Committee of the Chicago Mercantile Exchange
in which case the time of mailing shall be the time of notice.

     B. Notices shall be effectively served by Tenant upon Landlord in the
following manner:

     (i) By forwarding through certified or registered mail, postage prepaid to
an officer of Landlord.

     C. Additionally, any notice served by operation of either of the above
two.(2) subsections of this paragraph, a copy of such notice served shall be
forwarded by either certified or registered mail, postage prepaid, to Ira
Marcus, of Marcus, Esses, Ham and Associates, Ltd., 39 South LaSalle Street,
Chicago, Illinois 60603.

20. MISCELLANEOUS:

     A. No receipt of money by Landlord from Tenant after the termination of
this Lease or after the service of any notice or after the commencement of any
suit, or after final judgment for possession of the demised premises shall
reinstate, continue or extend the term of this Lease or affect any such notice,
demand or suit.

     B. No waiver of any default of Tenant or Landlord hereunder shall be
implied from any omission by Landlord or Tenant to take any action on account of
such default if such default persists or be repeated, and no express waiver
shall affect any default other than the default specified in the express waiver
and that only for the time and to the extent therein stated.

    C. The words "Landlord" and "Tenant" wherever used in this Lease shall be
construed to mean plural where necessary, and the necessary grammatical changes
required to make the provisions hereof apply either to corporations or
individuals, men or women, shall in all cases be assumed as though in each case
fully expressed.

                                     -23-
<PAGE>

     D. Each provision hereof shall extend to and shall, as the case may
require, bind and inure to the benefit of Landlord and Tenant and their
respective heirs, legal representatives, successors and assigns in the event
this Lease has been assigned.

     E. Submission of this instrument for examination does not constitute a
reservation of or option for the premises. The instrument does not become
effective as a lease or otherwise until execution and delivery by both Landlord
and Tenant.

     F. Any amounts owed by Tenant to Landlord hereunder shall be paid within
ten (10) days from the date Landlord renders statements of account therefor. If
unpaid for thirty (30) days all such amounts shall bear interest from the date
due until the date paid at the rate of 2% above the prime rate of interest in
effect at the First National Bank of Chicago on the date of payment.

     G. All riders attached to this Lease and initialed by Landlord and Tenant
are hereby made a part of this Lease as though inserted in this Lease.

     H. The headings of sections are for convenience only and do not limit or
construe the contents of the sections.

     I. If Tenant shall occupy the premises prior to the beginning of the term
of this Lease with Landlord's consent, all the provisions of this Lease shall be
in full force and effect as soon as Tenant occupies the premises. In the event
of such prior occupancy, this Lease shall be deemed to commence at such date.

     J. Landlord and Tenant agree that from time to time upon not less than
thirty (30) days prior request by Landlord or Tenant, Landlord or Tenant will
deliver to the other a statement in writing certifying (i) that this lease is
unmodified in full force and effect (of if there have been modifications that
the same is in full force and effect as modified and identifying the
modifications), and (ii) that so far as the person making the certificate knows,
the other is not in default under any provision of this Lease, if such be the
case.

                                     -24-
<PAGE>

    K. Landlord's title is and always shall be paramount to the title of Tenant,
and nothing herein contained shall empower Tenant to do any act which can, shall
or may encumber such title unless otherwise specified in this Lease.

    L. The laws of the State of Illinois shall govern the validity, performance,
construction and enforcement of this Lease.

    M. If any term, covenant or condition of this Lease or the application
thereof to any person or circumstance shall, to any extent, be invalid or
unenforceable, the remainder of this Lease, or the application of such term,
covenant or condition to persons or circumstances other than those as to which
it is held invalid or unenforceable, shall not be affected thereby and each
term, covenant or condition of this Lease shall be valid and be enforced to the
fullest extent permitted by law.

    N. If a Tenant is a corporation, the persons executing this Lease on behalf
of such corporation hereby represent and warrant that they have been duly
authorized to execute this Lease for and on behalf of such corporation pursuant
to a duly adopted resolution of its board of directors or by virtue of its
bylaws.

  21. QUIET ENJOYMENT: Landlord covenants and agrees that Tenant, upon paying
the rental and performing Tenant's other covenants and agreements under this
Lease, shall and may peacefully have and enjoy the demised premises for the term
of this lease free and clear from hindrance by Landlord or any person claiming
through Landlord.

  22. EFFECTIVE COMMENCEMENT DATE OF LEASE: Notwithstanding the date provided
herein with respect to the commencement of the term hereof, Tenant's obligation
to pay rent hereunder shall not commence until Landlord shall be able to deliver
possession of the premises to Tenant, and Landlord shall have notified Tenant,
in writing, of the availability of the premises.

  23. TENANT'S OPTION TO EXTEND THE TERM OF THIS LEASE: Provided Tenant is not
in default of any of the provisions of this Lease either at the time of
exercising this option to renew or at the time

                                     -25-

<PAGE>

of the commencement of the following described two option periods, the term of
this Lease may be extended, at the option of the Tenant, for four (4) successive
periods of Seven (7) years, each such period of Seven (7) years being herein
sometimes referred to as an extended term, as follows:

   First extended term November 1, 1998 to October 31, 2005.
   Second extended term November 1, 2005 to October 31, 2012.
   Third extended term November 1, 2012 to October 31, 2019.
   Fourth extended term November 1, 2019 to October 31, 2026.

  Such option to extend shall be exercised by the Tenant by giving written
notice to the Landlord not less than six (6) months prior to the expiration of
the then existing lease term.

  Each extended term shall be upon the same covenants and conditions, with the
annual base rent payable as agreed upon between the parties hereto, no less than
six (6) months prior to the expiration of the then existing lease term. Any
termination of this Lease during the initial term or during any extended term
shall terminate all rights of extension hereunder.

  IN WITNESS WHEREOF, the parties hereto have executed this Lease the date
first above written.

ATTEST:                        LANDLORD:

                                       CME REAL ESTATE COMPANY, an
                                       Illinois corporation of
                                       Chicago, Illinois

By /s/                                 By /s/
   -------------------                    ----------------------
Its                                    Its

ATTEST:                                TENANT:

                                       CHICAGO MERCANTILE EXCHANGE,
                                       an Illinois not for profit
                                       corporation of Chicago, Illinois

By /s/                                 By /s/
   -------------------                    ---------------------
Its                                    Its

                                     -26-
<PAGE>

                                   AMENDMENT
                                   ---------
     Amendment made as of the 6th day of December, 1989 by and between the
Chicago Mercantile Exchange ("Exchange") and the Chicago Mercantile Exchange
Trust ("Trust").

     WHEREAS, the Exchange and the Trust have previously entered into a rental
agreement for the rental of a trading floor at 30 South Wacker Drive, Chicago,
Illinois; and

     WHEREAS, at the inception a basic structure of the lease arrangement was
bonus rent in the event of increases in volume; and

     WHEREAS, the basic facts upon which such arrangements were based considered
the projected increase in volume primarily on futures contracts; and

     WHEREAS, the volume conditions in the Lease Agreement have been exceeded,
thus causing additional bonus payments of rent; and

     WHEREAS, a substantial part of that increase in volume is due to the
increase in option volume, rather than futures contracts; and

     WHEREAS, the revenue derived by the Lessee from options contracts is
substantially less than the revenue derived from execution of futures contracts
and the parties agree that the volume provisions of the lease agreement should
be stated in a term consistent with the original intention.

     NOW, THEREFORE, the parties agree as follows:

     1. The Lease Agreement will be amended effective as of January 1, 1989 to
provide for the equalization of volume from options to volume from futures based
upon a factor which will recognize the difference in clearing fee revenue
derived from futures and clearing fee revenue derived from options.

     2. The Lease Agreement shall be amended as follows:

<PAGE>

     Paragraph 2A(i) to read:

     "Trading Volume means the actual number of futures contract trades (as
      defined herein) in all commodities on the CME and its divisions (excluding
      transactions effected on Globex) each calendar year."

     3.  Paragraph 2 of the Lease Agreement will add the following provision as
Paragraph 2A(xi):

     "Futures contract trades shall be defined to include (1) all futures
      contracts traded on the CME; plus (2) the Factored Option Volume of all
      options contracts traded on the CME as calculated by the following
      formula:

                   C
         -------------------- = Factored Option Value
                   A
                 ( - )
                   B
     Where:

     A =  Annual volume from  options
          --------------------------------
          Total volume options and futures

     B =  Annual revenue from clearing fees on options
          --------------------------------------------
          Total annual clearing fees

     C =  Option value

     4.  The parties agree that except as provided herein, the terms set forth
in the Lease Agreement shall continue; however, this amendment shall be
effective as of January 1, 1989 for the purposes of determining any bonus rent
volume for the year ended December 31, 1989."

Chicago Mercantile Exchange Trust

By: /s/
    ---------------------------------
    Trustee

Chicago Mercantile Exchange

By: /s/
    ----------------------------------
    SVP Admin and Finance

                                      -2-

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