SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE                                          Code-006261
Commitments of Traders with Delta-adjusted Options and Futures Combined, May 15, 2007                    
-------------------------------------------------------------------------------------------------------------------
     :   Total  :                        Reportable Positions                                :   Nonreportable
     :----------------------------------------------------------------------------------------     Positions
     :   Open   :           Non-Commercial       :     Commercial      :       Total         :
     : Interest :   Long   :  Short   : Spreading:   Long   :  Short   :   Long   :  Short   :   Long   :  Short
-------------------------------------------------------------------------------------------------------------------
     :          : (CONTRACTS OF 25 U.S. EPA SO2 EMMISSION ALLOWANCES)                        :
     :          :                                                                            :
All  :    17,000:     3,355      1,261        308     12,963     14,338     16,627     15,907:       374      1,093
Old  :    17,000:     3,355      1,261        308     12,963     14,338     16,627     15,907:       374      1,093
Other:         0:         0          0          0          0          0          0          0:         0          0
     :          :                                                                            :
     :          :          Changes in Commitments from: May 8, 2007                          :
     :    -1,076:       -71        652       -513         86     -1,342       -498     -1,203:      -578        127
     :          :                                                                            :
     :          :    Percent of Open Interest Represented by Each Category of Trader         :
All  :     100.0:      19.7        7.4        1.8       76.3       84.3       97.8       93.6:       2.2        6.4
Old  :     100.0:      19.7        7.4        1.8       76.3       84.3       97.8       93.6:       2.2        6.4
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  :        27:         8          8          4         10         10         21         19:
Old  :        27:         8          8          4         10         10         21         19:
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  :                 80.2       79.9       91.1       88.4       45.9       44.5       52.9       49.4
Old  :                 80.2       79.9       91.1       88.4       45.9       44.5       52.9       49.4
Other:                  0.0        0.0        0.0        0.0        0.0        0.0        0.0        0.0
 
 

Updated May 18, 2007