SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY 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:       15,053
COMMITMENTS
   3,529      709      362   10,990   13,816   14,881   14,887      172      166

CHANGES FROM 05/22/07 (CHANGE IN OPEN INTEREST:       -648)
    -383      -63       15     -290     -672     -658     -720       10       72

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    23.4      4.7      2.4     73.0     91.8     98.9     98.9      1.1      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       28)
      12        5        6       10        9       24       18
 

Updated June 1, 2007