SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 03/25/08          |
--------------------------------------------------------------| 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:       33,311
COMMITMENTS
  10,122    3,283    3,355   19,697   26,316   33,173   32,953      139      358

CHANGES FROM 03/18/08 (CHANGE IN OPEN INTEREST:     -1,621)
     219   -1,096      197   -1,769     -595   -1,354   -1,495     -267     -126

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    30.4      9.9     10.1     59.1     79.0     99.6     98.9      0.4      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
       9        9       12       13       13       28       28


Updated March 28, 2008