SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 08/14/07                         |
--------------------------------------------------------------| 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:       16,451
COMMITMENTS
   4,625    1,376      923   10,796   14,057   16,344   16,356      107       95

CHANGES FROM 08/07/07 (CHANGE IN OPEN INTEREST:        105)
     249      477      236      -87     -105      398      608     -293     -503

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    28.1      8.4      5.6     65.6     85.4     99.3     99.4      0.7      0.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       29)
      11        8        7        7       10       21       22
 

Updated August 17, 2007