SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY 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:       15,701
COMMITMENTS
   3,912      772      347   11,280   14,488   15,539   15,607      162       94

CHANGES FROM 05/15/07 (CHANGE IN OPEN INTEREST:        398)
     488      -69      154     -280    1,075      362    1,160       36     -762

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    24.9      4.9      2.2     71.8     92.3     99.0     99.4      1.0      0.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      13        6        5       11        9       26       18
 

Updated May 25, 2007