SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders with Delta-adjusted Options and Futures Combined, August 21, 2007                 
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     :   Total  :                        Reportable Positions                                :   Nonreportable
     :----------------------------------------------------------------------------------------     Positions
     :   Open   :           Non-Commercial       :     Commercial      :       Total         :
     : Interest :   Long   :  Short   : Spreading:   Long   :  Short   :   Long   :  Short   :   Long   :  Short
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     :          : (CONTRACTS OF 25 U.S. EPA SO2 EMMISSION ALLOWANCES)                        :
     :          :                                                                            :
All  :    21,037:     4,435      1,716      2,411     13,886     16,650     20,732     20,778:       305        259
Old  :    21,037:     4,435      1,716      2,411     13,886     16,650     20,732     20,778:       305        259
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: August 14, 2007                      :
     :      -369:       692       -206         88     -1,020        -82       -240       -200:      -130       -169
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      21.1        8.2       11.5       66.0       79.1       98.5       98.8:       1.5        1.2
Old  :     100.0:      21.1        8.2       11.5       66.0       79.1       98.5       98.8:       1.5        1.2
Other:     100.0:       0.0        0.0        0.0        0.0        0.0        0.0        0.0:       0.0        0.0
     :          :                                                                            :
     :# Traders :              Number of Traders in Each Category                            :
All  :        34:        12         10         11         10         12         25         30:
Old  :        34:        12         10         11         10         12         25         30:
Other:         0:         0          0          0          0          0          0          0:
     :----------------------------------------------------------------------------------------------------
     :             Percent of Open Interest Held by the Indicated Number of the Largest Traders
     :                          By Gross Position                       By Net Position
     :               4 or Less Traders     8 or Less Traders     4 or Less Traders     8 or Less Traders
     :                 Long:     Short       Long      Short:      Long      Short       Long      Short
     :----------------------------------------------------------------------------------------------------
All  :                 66.1       68.7       83.5       82.2       33.6       31.6       39.5       37.7
Old  :                 66.1       68.7       83.5       82.2       33.6       31.6       39.5       37.7
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated August 24, 2007