SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders - Futures Only, May 13, 2008                    
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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                                    :
     :          :                                                                            :
All  :    25,684:    10,361      3,989        604     14,638     21,086     25,603     25,679:        81          5
Old  :    25,684:    10,361      3,989        604     14,638     21,086     25,603     25,679:        81          5
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: May 6, 2008                          :
     :       763:      -201       -296        276        681        817        756        797:         7        -34
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      40.3       15.5        2.4       57.0       82.1       99.7      100.0:       0.3        0.0
Old  :     100.0:      40.3       15.5        2.4       57.0       82.1       99.7      100.0:       0.3        0.0
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:        15          6          9         12         13         30         25:
Old  :        34:        15          6          9         12         13         30         25:
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  :                 65.7       75.7       83.4       89.2       50.4       54.8       58.3       61.9
Old  :                 65.7       75.7       83.4       89.2       50.4       54.8       58.3       61.9
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated May 16, 2008