Notice to Members
Notice No. 399
08/01/2008
Outright (Scan) Margin Rate and Tier Changes for Financially Settled Electricity Contracts
Effective Date: Tuesday, August 05, 2008 (close of business)

Futures Contracts:
Cinergy Hub LMP – Peak (EM), Michigan Hub LMP – Peak (HM), Dow Jones Mid-Columbia Electricity Prices Index Swap (DO), ERCOT North Peak Swap Contract (MT), Northern Illinois Hub – Off Peak (UO), AEP-Dayton Hub – Off Peak (VP), Cinergy Hub LMP – Off Peak (EJ), and Michigan Hub LMP – Off Peak (HJ
Contract Months: All Months


MT Outright (Scan) Margin Tiers
 
Tiers
New
Old
1
1st Nearby
All Months
2
2nd - 6th Nearby
N/A
3
7th - 11th Nearby
N/A
4
Greater than 11th Nearby
N/A



NYMEX Division Outright (Scan) Margins on Cinergy Hub LMP – Peak (EM)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $8,000 $5,000 $8,800 $5,500 $10,800 $6,750
Tier 2 $7,000 $5,000 $7,700 $5,500 $9,450 $6,750
Tier 3 $6,500 $6,500 $7,150 $7,150 $8,775 $8,775
Tier 4 $5,000 $5,500 $5,500 $6,050 $6,750 $7,425


NYMEX Division Outright (Scan) Margins on Michigan Hub LMP – On Peak (HM)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
HM $8,000 $6,500 $8,800 $7,150 $10,800 $8,775


NYMEX Division Outright (Scan) Margins on Dow Jones Mid-Columbia Electricity Prices Index Swap (DO)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $8,000 $7,000 $8,800 $7,700 $10,800 $9,450
Tier 2 $6,000 $6,000 $6,600 $6,600 $8,100 $8,100
Tier 3 $5,000 $5,000 $5,500 $5,500 $6,750 $6,750
Tier 4 $4,000 $4,000 $4,400 $4,400 $5,400 $5,400


NYMEX Division Outright (Scan) Margins on ERCOT North Peak Swap (Platts Megawatt Daily) Contract  (MT)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $12,000 $15,000 $13,200 $16,500 $16,200 $20,250
Tier 2 $10,000 N/A $11,000 N/A $13,500 N/A
Tier 3 $8,000 N/A $8,800 N/A $10,800 N/A
Tier 4 $7,000 N/A $7,700 N/A $9,450 N/A


NYMEX Division Outright (Scan) Margins on Northern Illinois Hub – Off Peak (UO)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $5,000 $3,000 $5,500 $3,300 $6,750 $4,050
Tier 2 $3,000 $1,500 $3,300 $1,650 $4,050 $2,025
Tier 3 $2,500 $1,500 $2,750 $1,650 $3,375 $2,025
Tier 4 $2,500 $1,500 $2,750 $1,650 $3,375 $2,025


NYMEX Division Outright (Scan) Margins on AEP-Dayton Hub – Off Peak (VP)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $5,000 $4,000 $5,500 $4,400 $6,750 $5,400
Tier 2 $4,000 $3,000 $4,400 $3,300 $5,400 $4,050
Tier 3 $3,000 $2,500 $3,300 $2,750 $4,050 $3,375
Tier 4 $2,500 $1,500 $2,750 $1,650 $3,375 $2,025


NYMEX Division Outright (Scan) Margins on Cinergy Hub LMP – Off Peak (EJ)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
Tier 1 $5,000 $4,000 $5,500 $4,400 $6,750 $5,400
Tier 2 $4,000 $2,500 $4,400 $2,750 $5,400 $3,375
Tier 3 $3,000 $2,500 $3,300 $2,750 $4,050 $3,375
Tier 4 $2,500 $1,500 $2,750 $1,650 $3,375 $2,025


NYMEX Division Outright (Scan) Margins on Michigan Hub LMP – Off Peak (HJ)
 
 
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
 
New
Old
New
Old
New
Old
HJ $5,000 $3,500 $5,500 $3,850 $6,750 $4,725
Should you have any questions or require any further information, please contact exchangeinfo@nymex.com