SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/01/08                         |
--------------------------------------------------------------| 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:       23,462
COMMITMENTS
   9,831    3,267      916   12,672   19,257   23,419   23,440       43       22

CHANGES FROM 03/25/08 (CHANGE IN OPEN INTEREST:     -1,654)
    -136      -30     -215   -1,210   -1,073   -1,561   -1,318      -93     -336

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    41.9     13.9      3.9     54.0     82.1     99.8     99.9      0.2      0.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       31)
      10        8        9       11       12       25       25
 

Updated April 4, 2008