SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 04/08/08          |
--------------------------------------------------------------| 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:       36,124
COMMITMENTS
  10,204    2,963    3,696   22,004   29,161   35,904   35,820      220      304

CHANGES FROM 04/01/08 (CHANGE IN OPEN INTEREST:        742)
     279       32      283       38      186      600      501      142      241

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    28.2      8.2     10.2     60.9     80.7     99.4     99.2      0.6      0.8

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      10        9       14       13       13       31       28


Updated April 11,2008