SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 05/22/07          |
--------------------------------------------------------------| 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:       18,139
COMMITMENTS
   3,703    1,129      638   13,379   16,027   17,720   17,794      419      345

CHANGES FROM 05/15/07 (CHANGE IN OPEN INTEREST:      1,139)
     348     -132      330      415    1,688    1,094    1,887       45     -748

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    20.4      6.2      3.5     73.8     88.4     97.7     98.1      2.3      1.9

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      12        7        6       11       10       26       20
 

Updated May 25, 2007