SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 12/18/07                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 25 U.S. EPA SO2 EMMISSION              OPEN INTEREST:       10,579
COMMITMENTS
   3,038    2,160      210    6,287    7,206    9,535    9,576    1,044    1,003

CHANGES FROM 12/11/07 (CHANGE IN OPEN INTEREST:     -7,791)
  -5,592   -2,733     -502   -2,262   -5,358   -8,356   -8,593      565      802

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    28.7     20.4      2.0     59.4     68.1     90.1     90.5      9.9      9.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
       9       11        6        8       10       19       25
 

Updated December 21, 2007