SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 08/28/07                         |
--------------------------------------------------------------| 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:       17,621
COMMITMENTS
   5,147    2,560      907   11,469   14,054   17,523   17,521       98      100

CHANGES FROM 08/21/07 (CHANGE IN OPEN INTEREST:        422)
      65      747       -3      490     -237      552      507     -130      -85

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    29.2     14.5      5.1     65.1     79.8     99.4     99.4      0.6      0.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
      10       10        8       10       11       23       27
 

Updated August 31, 2007