SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 08/21/07                         |
--------------------------------------------------------------| 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:       17,199
COMMITMENTS
   5,082    1,813      910   10,979   14,291   16,971   17,014      228      185

CHANGES FROM 08/14/07 (CHANGE IN OPEN INTEREST:        748)
     457      437      -13      183      234      627      658      121       90

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    29.5     10.5      5.3     63.8     83.1     98.7     98.9      1.3      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       33)
      11       11        8        9       11       23       27
 

Updated August 24, 2007