SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders with Delta-adjusted Options and Futures Combined, 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 ALLOWANCES)                        :
     :          :                                                                            :
All  :    40,844:    10,575      3,012      3,833     26,176     33,770     40,584     40,615:       260        229
Old  :    40,844:    10,575      3,012      3,833     26,176     33,770     40,584     40,615:       260        229
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: May 13, 2008                         :
     :      -673:      -990     -2,248      1,220       -994        235       -765       -793:        92        120
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      25.9        7.4        9.4       64.1       82.7       99.4       99.4:       0.6        0.6
Old  :     100.0:      25.9        7.4        9.4       64.1       82.7       99.4       99.4:       0.6        0.6
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  :        36:        15          7         15         14         14         35         30:
Old  :        36:        15          7         15         14         14         35         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  :                 59.4       72.4       77.6       86.4       27.1       30.6       33.1       35.3
Old  :                 59.4       72.4       77.6       86.4       27.1       30.6       33.1       35.3
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated May 23, 2008