SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY 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:       17,295
COMMITMENTS
   4,737    1,661      309   11,823   14,929   16,869   16,899      426      396

CHANGES FROM 07/17/07 (CHANGE IN OPEN INTEREST:        256)
     375      285      142     -110      -40      407      387     -151     -131

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    27.4      9.6      1.8     68.4     86.3     97.5     97.7      2.5      2.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      12        7        5        9       10       23       21
 

Updated July 27, 2007