SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 07/31/07          |
--------------------------------------------------------------| 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:       19,710
COMMITMENTS
   3,683    2,626    1,510   14,260   15,404   19,453   19,540      257      170

CHANGES FROM 07/24/07 (CHANGE IN OPEN INTEREST:         33)
    -122      844      133      210     -614      221      363     -188     -331

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    18.7     13.3      7.7     72.3     78.2     98.7     99.1      1.3      0.9

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      10       11        8       10       11       23       27


Updated August 3, 2007