SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/29/08                         |
--------------------------------------------------------------| 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:       26,272
COMMITMENTS
  10,561    3,579    1,607   13,799   20,752   25,967   25,938      305      334

CHANGES FROM 04/22/08 (CHANGE IN OPEN INTEREST:        511)
     443      508     -199       74       34      318      343      193      168

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    40.2     13.6      6.1     52.5     79.0     98.8     98.7      1.2      1.3

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
       8       10        7       12       12       24       25
 

Updated May 2, 2008