SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/08/08                         |
--------------------------------------------------------------| 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:       23,523
COMMITMENTS
  10,015    3,175      594   12,694   19,455   23,303   23,224      220      299

CHANGES FROM 04/01/08 (CHANGE IN OPEN INTEREST:         61)
     184      -92     -322       22      198     -116     -216      177      277

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    42.6     13.5      2.5     54.0     82.7     99.1     98.7      0.9      1.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
      10        7        8       11       12       24       24
 

Updated April 11,2008