SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 08/07/07          |
--------------------------------------------------------------| 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:       21,114
COMMITMENTS
   3,464    1,405    1,949   14,842   16,777   20,255   20,130      859      984

CHANGES FROM 07/31/07 (CHANGE IN OPEN INTEREST:      1,404)
    -219   -1,221      438      583    1,373      802      590      602      814

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    16.4      6.7      9.2     70.3     79.5     95.9     95.3      4.1      4.7

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       28)
      11        7        9        8       10       23       22


Updated August 10, 2007