SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 03/18/08          |
--------------------------------------------------------------| 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:       34,932
COMMITMENTS
   9,902    4,379    3,158   21,466   26,911   34,526   34,448      406      484

CHANGES FROM 03/11/08 (CHANGE IN OPEN INTEREST:       -528)
     854      201   -1,666       23      601     -789     -865      261      337

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    28.3     12.5      9.0     61.5     77.0     98.8     98.6      1.2      1.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
       9        9       10       13       13       27       27


Updated March 21, 2008