SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/22/08                         |
--------------------------------------------------------------| 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:       25,761
COMMITMENTS
  10,118    3,071    1,806   13,725   20,718   25,649   25,595      112      166

CHANGES FROM 04/15/08 (CHANGE IN OPEN INTEREST:      2,102)
     117     -586    1,179      823    1,483    2,119    2,076      -17       26

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    39.3     11.9      7.0     53.3     80.4     99.6     99.4      0.4      0.6

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
       8        9        7       12       13       24       25
 

Updated April 25, 2008