SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/24/07                         |
--------------------------------------------------------------| 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:       14,106
COMMITMENTS
   3,363      149      595    9,651   12,903   13,609   13,647      497      459

CHANGES FROM 04/17/07 (CHANGE IN OPEN INTEREST:          .)
       .        .        .        .        .        .        .        .        .

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    23.8      1.1      4.2     68.4     91.5     96.5     96.7      3.5      3.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       22)
      10        1        3        9       10       20       13
 

Updated April 27, 2007