SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 04/15/08          |
--------------------------------------------------------------| 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:       35,653
COMMITMENTS
  10,132    3,054    3,601   21,791   28,853   35,524   35,508      129      145

CHANGES FROM 04/08/08 (CHANGE IN OPEN INTEREST:       -471)
     -72       91      -95     -213     -308     -380     -312      -91     -159

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    28.4      8.6     10.1     61.1     80.9     99.6     99.6      0.4      0.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      10        9       12       13       13       30       27


Updated April 18, 2008