SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY 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:       16,358
COMMITMENTS
   4,567    2,319      671   11,087   13,328   16,325   16,318       33       40

CHANGES FROM 09/04/07 (CHANGE IN OPEN INTEREST:        551)
     245      221       87      243      271      575      579      -24      -28

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    27.9     14.2      4.1     67.8     81.5     99.8     99.8      0.2      0.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      12        9        6        9       11       22       25
 

Updated September 14, 2007