SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 07/17/07                         |
--------------------------------------------------------------| 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:       17,039
COMMITMENTS
   4,362    1,376      167   11,933   14,969   16,462   16,512      577      527

CHANGES FROM 07/10/07 (CHANGE IN OPEN INTEREST:        541)
     696        8      -41       94      843      749      810     -208     -269

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    25.6      8.1      1.0     70.0     87.9     96.6     96.9      3.4      3.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       29)
      11        8        4        9       10       21       21
 

Updated July 20, 2007