SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 09/04/07                         |
--------------------------------------------------------------| 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:       15,807
COMMITMENTS
   4,322    2,098      584   10,844   13,057   15,750   15,739       57       68

CHANGES FROM 08/28/07 (CHANGE IN OPEN INTEREST:     -1,814)
    -825     -462     -323     -625     -997   -1,773   -1,782      -41      -32

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    27.3     13.3      3.7     68.6     82.6     99.6     99.6      0.4      0.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      11        8        5        8       11       20       23
 

Updated September 7, 2007