SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 08/07/07                         |
--------------------------------------------------------------| 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:       16,346
COMMITMENTS
   4,376      899      687   10,883   14,162   15,946   15,748      400      598

CHANGES FROM 07/31/07 (CHANGE IN OPEN INTEREST:       -538)
    -420   -1,412      354     -680       89     -746     -969      208      431

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    26.8      5.5      4.2     66.6     86.6     97.6     96.3      2.4      3.7

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       28)
      12        6        6        7       10       22       19
 

Updated August 10, 2007