SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
OPTION AND FUTURES COMBINED POSITIONS AS OF 05/29/07          |
--------------------------------------------------------------| 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:       17,766
COMMITMENTS
   3,284    1,053      692   13,345   15,592   17,321   17,338      445      428

CHANGES FROM 05/22/07 (CHANGE IN OPEN INTEREST:       -373)
    -420      -76       54      -33     -434     -399     -456       26       83

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    18.5      5.9      3.9     75.1     87.8     97.5     97.6      2.5      2.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       28)
      10        7        7       11       11       25       21
 

Updated June 1, 2007