SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders - Futures Only, May 20, 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  :    27,155:    10,536      3,702        574     15,807     22,739     26,917     27,015:       238        140
Old  :    27,155:    10,536      3,702        574     15,807     22,739     26,917     27,015:       238        140
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: May 13, 2008                         :
     :     1,471:       175       -287        -30      1,169      1,653      1,314      1,336:       157        135
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      38.8       13.6        2.1       58.2       83.7       99.1       99.5:       0.9        0.5
Old  :     100.0:      38.8       13.6        2.1       58.2       83.7       99.1       99.5:       0.9        0.5
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  :        35:        15          7         12         12         13         31         28:
Old  :        35:        15          7         12         12         13         31         28:
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  :                 66.0       70.8       82.4       86.8       43.8       47.0       51.3       53.6
Old  :                 66.0       70.8       82.4       86.8       43.8       47.0       51.3       53.6
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated May 23, 2008