CFE

Via Electronic Mail

August 5, 2005

Ms. Jean A. Webb
Secretary

Commodity Futures Trading Commission
Three Lafayette Centre

1155 21st Street, N.W.

Washington, D.C. 20581

Re: CBOE Futures Exchange, LLC Rule Certification
Submission Number CFE-2005-24

Dear Ms. Webb:

Pursuant to Section Sc(c)(1) of the Commodity Exchange Act, as amended ("Act"), and
§40.6(a) of the regulations promulgated by the Commodity Futures Trading Commission
("Commission") under the Act, CBOE Futures Exchange, LLC ("CFE” or "Exchange") hereby
submits this rule change ("Amendment") to amend CFE Rules 1502(k) and 1602(k) to adjust the
"no bust range” under CFE's error trade policy (set forth in CFE Rule 416 and CFE Policy and
Procedure III) for CFE's Mini-Russell 2000 Index and Russell 1000 Index futures contracts.
Specifically, the Amendment establishes a no bust range in percentage terms instead of in
absolute index point levels so that the "no bust range" does not need to be adjusted as the
applicable index value changes to maintain the equivalent "no bust range” in relation to that index
value. This is consistent with the "no bust ranges" for CFE's other products which are also
expressed in percentage terms.

The Amendment will become effective on August 8, 2005.

CFE is not aware of any substantive opposing views to the Amendment. CFE hereby
certifies that the Amendment complies with the Act and the regulations thereunder.

RRR EK

Rule 1502. Contract Specifications

(3) No-Bust Range. Pursuant to Rule 416, the CFE error trade policy may only be invoked
for a trade price that is greater than .5% [three index points, which is equal to $300.00,] on either
side of the market price of the applicable Mini-Russell 2000 Index futures contract. In.
accordance with Policy and Procedure Ill, the Help Desk will determine what the true market
price for the relevant Contract was immediately before the potential error trade occurred. In
making that determination, the Help Desk may consider all relevant factors, including the last
trade price for such Contract, a better bid or offer price, a more recent price in a different contract
month and the prices of related contracts trading in other markets.

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400 South LaSalle Street Chicago, Illinois 60605-1023 www.cboe.com/cfe



Ms. Jean A. Webb
Page 2 of 2

Rule 1602 Contract Specifications

() No-Bust Range. Pursuant to Rule 416, the CFE error trade policy may only be invoked
for a trade price that is greater than .5% [three index points, which is equal to $1,500.00,] on
either side of the market price of the applicable Russell 1000 Index futures contract. In
accordance with Policy and Procedure III, the Help Desk will determine what the true market
price for the relevant Contract was immediately before the potential error trade occurred. In
making that determination, the Help Desk may consider all relevant factors, including the last
trade price for such Contract, a better bid or offer price, a more recent price in a different contract
month and the prices of related contracts trading in other markets.

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Questions regarding this submission may be directed to David Doherty at (312) 786-
7466. Please reference our submission number CFE-2005-24 in any related correspondence.

CBOE Futures Exchange, LLC

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Edward J. Joyce HW 7
President

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Mark Baumgardner (OCC)