SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 12/04/07          |
--------------------------------------------------------------| 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:       23,740
COMMITMENTS
   7,535    6,253    2,590   13,602   14,849   23,726   23,692       14       48

CHANGES FROM 11/27/07 (CHANGE IN OPEN INTEREST:     -1,654)
    -881    2,019   -1,099      472   -2,595   -1,508   -1,676     -146       22

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    31.7     26.3     10.9     57.3     62.5     99.9     99.8      0.1      0.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       33)
      10       11       14       11       12       28       30


Updated December 7, 2007