SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 06/03/08          |
--------------------------------------------------------------| 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:       42,091
COMMITMENTS
  10,888    2,347    4,160   26,815   35,370   41,864   41,877      227      213

CHANGES FROM 05/27/08 (CHANGE IN OPEN INTEREST:        889)
     183      140      287      478      484      948      911      -58      -21

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    25.9      5.6      9.9     63.7     84.0     99.5     99.5      0.5      0.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       36)
      14        7       13       15       15       35       29


Updated June 6, 2008