SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 04/24/07          |
--------------------------------------------------------------| 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:       15,580
COMMITMENTS
   3,370      264      670   11,043   14,187   15,083   15,121      497      459

CHANGES FROM 04/17/07 (CHANGE IN OPEN INTEREST:          .)
       .        .        .        .        .        .        .        .        .

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    21.6      1.7      4.3     70.9     91.1     96.8     97.1      3.2      2.9

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       22)
       9        2        5       11       11       22       16
 

Updated April 27, 2007