SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 05/27/08                         |
--------------------------------------------------------------| 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:       26,552
COMMITMENTS
  10,601    2,827      347   15,371   23,323   26,319   26,497      233       55

CHANGES FROM 05/20/08 (CHANGE IN OPEN INTEREST:       -603)
      65     -875     -227     -436      584     -598     -518       -5      -85

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    39.9     10.6      1.3     57.9     87.8     99.1     99.8      0.9      0.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       35)
      14        7       10       13       14       30       28
 

Updated May 30,2008