SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 09/04/07          |
--------------------------------------------------------------| 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:       20,065
COMMITMENTS
   3,349    2,136    2,331   14,311   15,523   19,991   19,990       74       75

CHANGES FROM 08/28/07 (CHANGE IN OPEN INTEREST:     -2,248)
    -800     -544     -399     -891   -1,155   -2,091   -2,099     -157     -149

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    16.7     10.6     11.6     71.3     77.4     99.6     99.6      0.4      0.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
       9       10        9       11       12       25       26


Updated September 7, 2007