SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 12/11/07                         |
--------------------------------------------------------------| 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:       18,370
COMMITMENTS
   8,630    4,893      712    8,549   12,564   17,891   18,169      479      201

CHANGES FROM 12/04/07 (CHANGE IN OPEN INTEREST:        -73)
     790     -106      110   -1,438     -230     -538     -226      465      153

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    47.0     26.6      3.9     46.5     68.4     97.4     98.9      2.6      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       35)
      12       11        8        8       12       22       29
 

Updated December 14, 2007