SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 09/18/07          |
--------------------------------------------------------------| 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:       22,915
COMMITMENTS
   3,927    2,377    2,917   15,673   17,253   22,516   22,547      398      368

CHANGES FROM 09/11/07 (CHANGE IN OPEN INTEREST:         59)
     359     -187      438   -1,071     -497     -274     -245      332      304

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    17.1     10.4     12.7     68.4     75.3     98.3     98.4      1.7      1.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       34)
      12       10       11       12       12       27       30


Updated September 21, 2007