SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 05/27/08          |
--------------------------------------------------------------| 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:       41,201
COMMITMENTS
  10,705    2,207    3,873   26,338   34,887   40,916   40,967      285      234

CHANGES FROM 05/20/08 (CHANGE IN OPEN INTEREST:        357)
     130     -805       40      162    1,117      332      352       25        5

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    26.0      5.4      9.4     63.9     84.7     99.3     99.4      0.7      0.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       36)
      15        6       14       15       15       35       30


Updated May 30,2008