SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 10/16/07                         |
--------------------------------------------------------------| 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:       19,480
COMMITMENTS
   6,234    2,946      712   12,427   15,615   19,373   19,273      107      207

CHANGES FROM 10/09/07 (CHANGE IN OPEN INTEREST:      1,089)
    -353        6     -156    1,522    1,069    1,013      919       76      170

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    32.0     15.1      3.7     63.8     80.2     99.5     98.9      0.5      1.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       34)
      11       10        9        8       12       23       28
 

Updated October 19, 2007