Notice to Members

Notice No. 70
02/19/2008

Outright (Scan) Margin Rates Change for Financially Settled Electricity Contracts

Effective Date: Thursday, February 21, 2008 (close of business)

Contracts: Northern Illinois Hub – Peak (UM), ISO New England Internal Hub – Peak (NI), NYISO Zone A – Off Peak (KB), NYISO Zone G – Off Peak (KH), NYISO Zone J – Off Peak (KK)

Contract Months: All Months

NOTE: The revised margins are in bold.

NYMEX Division Outright (Scan) Margins on Northern Illinois Hub – Peak (UM)
Tiers	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	New	Old	New	Old	New	Old
Tier 1: 1st Nearby	$7,000	$10,000	$7,700	$11,000	$9,450	$13,500
Tier 2: 2nd - 6th Nearby	$6,000	$6,000	$6,600	$6,600	$8,100	$8,100
Tier 3: 7th - 11th Nearby	$5,000	$5,000	$5,500	$5,500	$6,750	$6,750
Tier 4: Greater than 11th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725

NYMEX Division Outright (Scan) Margins on ISO New England Internal Hub – Peak (NI)
Tiers	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	New	Old	New	Old	New	Old
Tier 1: 1st Nearby	$6,000	$7,000	$6,600	$7,700	$8,100	$9,450
Tier 2: 2nd - 6th Nearby	$5,000	$6,000	$5,500	$6,600	$6,750	$8,100
Tier 3: 7th - 11th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 4: Greater than 11th Nearby	$2,500	$2,500	$2,750	$2,750	$3,375	$3,375

NYMEX Division Outright (Scan) Margins on NYISO Zone A – Off Peak (KB)
Tiers	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	New	Old	New	Old	New	Old
Tier 1: 1st Nearby	$5,000	$4,000	$5,500	$4,400	$6,750	$5,400
Tier 2: 2nd - 6th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 3: 7th - 11th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 4: Greater than 11th Nearby	$3,000	$3,000	$3,300	$3,300	$4,050	$4,050

NYMEX Division Outright (Scan) Margins on NYISO Zone G – Off Peak (KH)
Tiers	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	New	Old	New	Old	New	Old
Tier 1: 1st Nearby	$5,000	$4,000	$5,500	$4,400	$6,750	$5,400
Tier 2: 2nd - 6th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 3: 7th - 11th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 4: Greater than 11th Nearby	$3,000	$3,000	$3,300	$3,300	$4,050	$4,050

NYMEX Division Outright (Scan) Margins on NYISO Zone J – Off Peak (KK)
Tiers	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	New	Old	New	Old	New	Old
Tier 1: 1st Nearby	$5,000	$4,000	$5,500	$4,400	$6,750	$5,400
Tier 2: 2nd - 6th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 3: 7th - 11th Nearby	$3,500	$3,500	$3,850	$3,850	$4,725	$4,725
Tier 4: Greater than 11th Nearby	$3,000	$3,000	$3,300	$3,300	$4,050	$4,050

Should you have any questions regarding these changes, please contact William Doherty at (212) 299-2925. This notice supersedes all previous notices regarding margins rates for the Electricity Futures contracts listed above.

Should you have any questions or require any further information, please contact exchangeinfo@nymex.com