SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 10/23/07          |
--------------------------------------------------------------| 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:       24,670
COMMITMENTS
   6,788    4,623    2,276   15,316   17,480   24,380   24,379      290      291

CHANGES FROM 10/16/07 (CHANGE IN OPEN INTEREST:      2,786)
     932    1,721      917      756       69    2,606    2,707      180       79

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    27.5     18.7      9.2     62.1     70.9     98.8     98.8      1.2      1.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       37)
      12       12       14       12       12       31       32


Updated October 26, 2007