SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 03/25/08                         |
--------------------------------------------------------------| 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:       25,116
COMMITMENTS
   9,967    3,297    1,131   13,882   20,330   24,980   24,758      136      358

CHANGES FROM 03/18/08 (CHANGE IN OPEN INTEREST:     -2,194)
     290   -1,096      149   -2,567   -1,241   -2,128   -2,188      -66       -6

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    39.7     13.1      4.5     55.3     80.9     99.5     98.6      0.5      1.4

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       30)
       9        8        9       12       12       25       25
 

Updated March 28, 2008