SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 08/14/07          |
--------------------------------------------------------------| 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:       21,406
COMMITMENTS
   3,743    1,923    2,323   14,906   16,732   20,972   20,978      435      428

CHANGES FROM 08/07/07 (CHANGE IN OPEN INTEREST:        292)
     279      517      374       63      -44      717      848     -424     -555

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    17.5      9.0     10.9     69.6     78.2     98.0     98.0      2.0      2.0

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      11        8       10       10       11       25       25


Updated August 17, 2007