cme @

Chicago Mercantile Exchange
ED ee eee EEE 20 South Wacker Drive 312/930.1000 te!
Chicago, 1. 60606-7499 312/466.4410 fax

www.cme.com

March 3, 2006

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 - Amendment to NASDAQ 100
and E-Mini NASDAQ 100 futures minimum tick.
CME Submission# 06-16.

Dear Ms. Webb:

Chicago Mercantile Exchange Inc. (““CME” or “Exchange”) hereby notifies the Commission of
an amendment to the NASDAQ 100 and the E-Mini NASDAQ 100 futures minimum tick fluctuation.

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

On February 13, 2006, the Board Steering Committee approved a reduction in the NASDAQ 100
and E-Mini NASDAQ 100 futures minimum tick from 0.50 to 0.25. This amendment is in response to
changes in Index volatility whereby the current minimum tick fluctuation is no longer representative of
the market. This change will be implemented on Sunday, April 2 for a trade date of April 3". Rule
language follows 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. Please reference our CME Submission
#06-16 on all future correspondence regarding this notification.


Reduction in the NASDAQ 100 futures tick
March 3, 2006
Page 2 of 3

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


Reduction in the NASDAQ 100 futures tick
March 3, 2006

Page 3 of 3
Text of Rule Amendments
(Additions are underlined, deletions are bracketed and overstruck.)
CHAPTER 357: NASDAQ 100 Index Futures
35702.C. Price Increments

Bids and offers shall be quoted in terms of the Nasdaq 100 Index. The minimum fluctuation of the futures
contract shall be [0:50] 0.25 index points, equivalent to $[50] 25.00 per contract. Trades may also occur in
multiples of 0.05 index points, for Nasdaq 100 futures calendar spreads executed as simultaneous transactions
pursuant to Rule 542.A.

CHAPTER 359: E-mini NASDAQ 100 Index Futures

35902.C. Price Increments

Bids and offers shall be quoted in terms of the Nasdaq 100 Index. The minimum fluctuation of the futures
contract shall be [050] 0.25 index points, equivalent to $[40] 5.00 per contract. Trades may also occur in
multiples of 0.05 index points, for E-Mini Nasdaq 100 futures calendar spreads executed as simultaneous
transactions pursuant to Rule 542.A.

Clean Copy of Rule Amendments
CHAPTER 357: NASDAQ 100 Index Futures

35702.C. Price Increments

Bids and offers shall be quoted in terms of the Nasdaq 100 Index. The minimum fluctuation of the futures
contract shall be 0.25 index points, equivalent to $25.00 per contract. Trades may also occur in multiples of 0.05
index points, for Nasdaq 100 futures calendar spreads executed as simultaneous transactions pursuant to Rule
542.A.

CHAPTER 359: E-mini NASDAQ 100 Index Futures

35902.C. Price Increments
Bids and offers shall be quoted in terms of the Nasdaq 100 Index. The minimum fluctuation of the futures
contract shall be 0.25 index points, equivalent to $5.00 per contract. Trades may also occur in multiples of 0.05

index points, for E~Mini Nasdaq 100 futures calendar spreads executed as simultaneous transactions pursuant to
Rule 542.A.