SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 06/03/08                         |
--------------------------------------------------------------| 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:       26,295
COMMITMENTS
  10,848    2,812      199   15,073   23,267   26,120   26,278      175       17

CHANGES FROM 05/27/08 (CHANGE IN OPEN INTEREST:       -257)
     247      -15     -148     -298      -56     -199     -219      -58      -38

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    41.3     10.7      0.8     57.3     88.5     99.3     99.9      0.7      0.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       35)
      14        7        9       13       13       30       26
 

Updated June 6, 2008