Amendments to E-Mini Russell 2000 and Russell 2000 tick
October 26, 2005
‘Page 4 of 4

Chapter 354A
Options on Russell 2000 Futures

354A01.C. Minimum Fluctuations

The price of an option shall be quoted in index points. Each .01 index point (1 basis point) shall
represent $5. The minimum fluctuation shall be 0.10_index points (also known as one tick).

Trades may also occur at a price of 0.05 index points $25.00 whether or not such trades result in the
liquidation of positions for both parties to the trade. A trade with a price equal to or less than 3.00 index
points may also occur at a price in multiples of .05 index points.


cme @

[ 28 94 > 25 Chicago Mercantile Exchange
OFCLe 2 SLURETARIAI 20 South Wacker Drive 312/930.1000 tel
Chicago, It 60606-7499 312/466.4410 fax

www.cme.com

October 26, 2005

Ms. Jean A. Webb

Office of the Secretariat

Commodity Futures Trading Commission
Three Lafayette Centre

1155 21st Street, NW

Washington, DC 20581

RE: Section Sc(c)(1), Part 40.6 - Amendments to the minimum tick for the
Russell 2000 and the E-Mini Russell 2000 options contracts.
CME Submission# 05-106.

Dear Ms. Webb:

Chicago Mercantile Exchange Inc. (“CME” or “Exchange”) hereby notifies the Commission of
Amendments to the minimum tick fluctuations for the Russell 2000 and the E-Mini Russell 2000 options
contracts as approved by the Approving Officers on October 26, 2005.

The Exchange certifies that these amendments comply with the Act and rules thereunder.

System constraints are requiring an amendment to the options on E-Mini Russell 2000 futures
minimum tick fluctuation. Currently the minimum tick fluctuation is 0.10 with cabinet trades at 0.05. In
order to accommodate a cabinet trade tick at 0.05 in the new mass quoting system, a variable tick must
be implemented. To retain consistency between the E-mini Russell 2000 contract and the standard sized
contract, the same change will be implemented in the Russell 2000 options contract. These amendments
are to become effective on November 6, 2005. Amendments follow below with additions underlined and
deletions bracketed and struck out.

If you require any additional information regarding this action, please do not hesitate to contact
Ms. Ariel Hantin, Senior Research Analyst at 312-559-4951 or via e-mail at ahantin@cme.com. Please
reference our CME Submission #05-106 on all future correspondence regarding this notification.


Amendments to E-Mini Russell 2000 and Russell 2000 tick
October 26, 2005
Page 2 of 4

Sincerely,

John W. Labuszewski, Director
Research & Product Development

ce: Mr. Thomas M. Leahy and Mr. Steven B. Benton
CFTC Division of Market Oversight, Product Review & Analysis Section


Amendments to E-Mini Russell 2000 and Russell 2000 tick
October 26, 2005
Page 3 of 4

Text of Rule Amendments
(Additions are underlined, deletions are bracketed and overstruck.)

Chapter 361A
Options on E-Mini Russell 2000 Futures
361A01.C. Minimum Fluctuations

The price of an option shall be quoted in index points. Each .01 index point (1 basis point) shall
represent $1.00. The minimum fluctuation shall be 0.10 index points (also known as one tick).

Trades may also occur at a price of 0.05 index points $5.00, also known as one-half tick, whether or not
such trades result in the liquidation of positions for both parties to the trade. A trade with a price equal to
or less than 3.00 index points may also occur at a price in multiples of .05 index points.

Chapter 354A
Options on Russell 2000 Futures

354A01.C. Minimum Fluctuations

The price of an option shall be quoted in index points. Each .01 index point (1 basis point) shall
represent $5. The minimum fluctuation shall be [-05] 0.10 index points (also known as one tick).

Trades may also occur at a price of [-025] 0.05 index points $25.00 [$1250--alsete Balt
tielQ] whether or not such trades result in the liquidation of positions for both parties to the trade. A
trade with a price equal to or less than 3.00 index points may also occur at a price in multiples of .05
index points.

Clean Copy of Rule Amendments
Chapter 361A
Options on E-Mini Russell 2000 Futures
361A01.C. | Minimum Fluctuations

The price of an option shall be quoted in index points. Each .01 index point (1 basis point) shall
represent $1.00. The minimum fluctuation shall be 0.10 index points (also known as one tick).

Trades may also occur at a price of 0.05 index points $5.00, also known as one-half tick, whether or not

such trades result in the liquidation of positions for both parties to the trade. A trade with a price equal to
or less than 3.00 index points may also occur at a price in multiples of .05 index points.