SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 07/31/07                         |
--------------------------------------------------------------| 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:       16,884
COMMITMENTS
   4,796    2,311      333   11,563   14,073   16,692   16,717      192      167

CHANGES FROM 07/24/07 (CHANGE IN OPEN INTEREST:       -411)
      59      650       24     -260     -856     -177     -182     -234     -229

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    28.4     13.7      2.0     68.5     83.4     98.9     99.0      1.1      1.0

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
      11       10        6        9       10       22       24
 

Updated August 3, 2007