SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 07/24/07          |
--------------------------------------------------------------| 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:       19,677
COMMITMENTS
   3,805    1,782    1,378   14,049   16,017   19,232   19,177      445      500

CHANGES FROM 07/17/07 (CHANGE IN OPEN INTEREST:        398)
     -86      259      735      -77     -348      573      646     -175     -249

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    19.3      9.1      7.0     71.4     81.4     97.7     97.5      2.3      2.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      11        9        8       10       11       24       26


Updated July 27, 2007