cme @

Chicago Mercantile Exchange

20 South Wacker Drive
Chicago, IL 60606-7499
www.cme.com

October 19, 2006

Ms. Eileen Donovan

Office of the Secretariat

Commodity Futures Trading Commission
Three Lafayette Centre

1155 21" Street, N.W.

Washington, D.C. 20581

RE: CME Rule 588.K. (‘Globex No Bust Ranges”)
Submission No. 06-88

Dear Ms. Webb:

Chicago Mercantile Exchange Inc. (“CME” or “Exchange”) hereby notifies the Commission that
the Exchange has approved an amendment to Rule 588.K. to include the no bust range for the NYMEX
REBCO contract that trades on CME Globex®. The rule is attached with the addition underlined.

The Exchange certifies that this regulatory advisory neither violates nor is inconsistent with any
provision of the Commodity Exchange Act or of the rules and regulations thereunder.
If you have any questions regarding this matter, please call me at (312) 648-5422.

Sincerely,

/S/ Stephen M. Szarmack
Director and Associate General Counsel

‘SMS/elm/5962 Sub 06-88


588.K.

GLOBEX No Bust Ranges

Eutures

Eurodollar, E-mini Eurodollar and LIBOR
E-mini Eurodollar Bundle

TBills

Fed Fund “Turn”

Agency Notes

Swaps

THE and CETES

CPI Futures

Eurozone HICP Futures

Currency Futures (except British pound and
Mexican Peso)

British Pound Futures and Mexican Peso Futures
S&P 500 and E-mini S&P 500

S&P Citigroup Growth

S&P Citigroup Value

‘S&P Midcap 400 and E-mini S&P Midcap 400
S&P Smalicap 600

E-Mini S&P Asia 50

E-Mini MSCI EAFE

S&P 500 Depository Receipts

Russell 2000 and E-mini Russell 2000
E-mini Russell 1000

iShares Russell 2000

Nasdaq-100 and E-mini Nasdaq-100
E-mini Nasdaq Composite

E-mini Nasdaq Biotechnology

Nasdaq-100 Index Tracking Stock

Nikkei 225 ($ and ¥)

S&P 500 Technology SPCTR

S&P 500 Financial SPCTR

Housing Futures

TRAKRS Futures

Goldman Sachs Commodity Index

CME Weather

‘Lean Hogs

Live Cattle

Feeder Cattle

Pork Bellies

Butter (Cash-Settled)

Milk

Urea

DAP

UAN

Ethanol

NYMEX Crude Oil and NYMEX miNY Crude Oil
NYMEX Brent and NYMEX miNY Brent
NYMEX REBCO

NYMEX Natural Gas and NYMEX miNY Natural
Gas

NYMEX Natural Gas (last-day) futures
NYMEX Heating Oil and NYMEX miNY Heating
Oi

NYMEX RBOB Gasoline and NYMEX miNY
RBOB Gasoline

NYMEX Unleaded Gas

NYMEX Propane

NYMEX Singapore 380 Fuel Oi

NYMEX Gas Oil

NYMEX Palladium

NYMEX Platinum

Futures Combinations

All Eurodoliar Combinations:

E-mini Eurodollar Bundle Spreads
Intra-Commodity (non-ED and non-E-Livestock)
Futures Spreads

Intra-Commodity E-Livestock Futures Spreads
(Lean Hogs, Live Cattle, Feeder Cattle, Pork
Bellies, Milk) and Housing Futures
Inter-Commodity (non-ED) Futures Spreads

No Bust Range

2.5 basis points or less
2.5 basis points or less
5 basis points or less
50 basis points or less
16 ticks or less

5 basis points or less
30 ticks or less

5 basis points or less
25 basis points or less
20 ticks or less

30 ticks or less

6.00 index points or less
4.00 index points or less
4,00 index points or less
4.00 index points or less
4.00 index points or less
12.00 index points or less
12.00 index points or less
0.60 index points or less
4.00 index points or less
4.00 index points or less
0.40 index points or less
12.00 index points or less
12.00 index points or less
12.00 index points or less
0.30 index points or less
60.00 index points or less
3.00 index points or less
3.00 index points or less
2.00 index points or less
25 cents or less.

2.50 index points or less
25.00 index points or less
$0.0050 per pound or less
$0.0050 per pound or less
$0.0050 per pound or less
$0.0050 per pound or less
$0.0075 per pound or less
$0.20 per cwt. or less

$3 per ton or less

$3 per ton or less

$3 per ton or less

$.025 per gallon or less
$0.25

$0.25
$0.25
$0.05

$0.05
$0.01

$0.01

$0.01

$0.01

$2.00

$4.00

$5.00 per troy ounce or less
$10.00 per troy ounce or less

2.5 basis points or less
2.5 basis points or less
5 ticks or less

‘Same as the no bust range of the individual legs

The wider of the no bust ranges of the two individual
legs


Futures:

All NYMEX Intra-commodity Combinations
NYMEX Inter-Commodity Futures Spreads

NYMEX Strips

Options on Futures

Interest Rate Options

All Eurodollar Covered Strategies

Prices below or equal to 5 basis points

Prices greater than 5 through 15 basis points
Prices greater than 15 through 25 basis points
Prices greater than 25 basis points

Interest Rate Options (Deltas greater than 50%)
Equity Index Options

Any premium level

Currency Options

Any premium level

No Bust Range

Same as the no bust range of the individual legs
The wider of the no bust ranges of the two individual
legs

Same as the no bust range of the individual legs

No Bust Range

1 basis point

1 basis point
1.5 basis points
2 basis points
2.5 basis points
2.5 basis points

20% of premium (up to 3.00 index points with a
minimum of 1 tick) or less

20% of premium (up to 10 ticks with a minimum of 1
tick) or less