SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 09/18/07                         |
--------------------------------------------------------------| 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:       16,932
COMMITMENTS
   5,338    2,705      643   10,866   13,506   16,847   16,854       85       78

CHANGES FROM 09/11/07 (CHANGE IN OPEN INTEREST:        574)
     771      386      -28     -221      178      522      536       52       38

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    31.5     16.0      3.8     64.2     79.8     99.5     99.5      0.5      0.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       33)
      12       10        7        9       10       23       25
 

Updated September 21, 2007