合約月份               最后交易日                                               
                                                                                
九月                  二零零七年九月二十七日                                    
十月                  二零零七年十月三十日                                      
十一月                二零零七年十一月二十九日                                  
十二月                二零零七年十二月二十八日                                  
三月                  二零零八年三月二十八日                                    
六月                  二零零八年六月二十七日