SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 09/11/07          |
--------------------------------------------------------------| 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:       22,856
COMMITMENTS
   3,568    2,563    2,479   16,744   17,750   22,790   22,792       66       65

CHANGES FROM 09/04/07 (CHANGE IN OPEN INTEREST:      2,791)
     219      427      147    2,433    2,227    2,799    2,801       -8      -11

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    15.6     11.2     10.8     73.3     77.7     99.7     99.7      0.3      0.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       33)
      10       11       11       12       12       27       29


Updated September 14, 2007