SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders with Delta-adjusted Options and Futures Combined, April 1, 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  :    35,383:     9,924      2,931      3,414     21,967     28,974     35,305     35,319:        78         64
Old  :    35,383:     9,924      2,931      3,414     21,967     28,974     35,305     35,319:        78         64
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: March 25, 2008                       :
     :     2,071:      -197       -352         59      2,270      2,658      2,132      2,366:       -61       -294
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      28.0        8.3        9.6       62.1       81.9       99.8       99.8:       0.2        0.2
Old  :     100.0:      28.0        8.3        9.6       62.1       81.9       99.8       99.8:       0.2        0.2
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  :        32:        11          8         13         13         13         30         28:
Old  :        32:        11          8         13         13         13         30         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  :                 60.6       76.1       82.6       87.4       32.7       35.3       39.7       39.9
Old  :                 60.6       76.1       82.6       87.4       32.7       35.3       39.7       39.9
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated April 4, 2008