SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 12/24/07                         |
--------------------------------------------------------------| 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:        9,309
COMMITMENTS
   2,942    1,636      160    6,090    7,410    9,192    9,206      117      103

CHANGES FROM 12/18/07 (CHANGE IN OPEN INTEREST:     -1,270)
     -96     -524      -50     -197      204     -343     -370     -927     -900

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    31.6     17.6      1.7     65.4     79.6     98.7     98.9      1.3      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
       9       12        5        9        9       20       24
 

Updated December 28, 2007