SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 12/31/07                         |
--------------------------------------------------------------| 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:        9,392
COMMITMENTS
   3,731    1,432      161    4,851    7,174    8,743    8,767      649      625

CHANGES FROM 12/24/07 (CHANGE IN OPEN INTEREST:         83)
     789     -204        1   -1,239     -236     -449     -439      532      522

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    39.7     15.2      1.7     51.7     76.4     93.1     93.3      6.9      6.7

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
       9       10        6        9       10       21       23
 

Updated January 4, 2008