| 
                 
                    Closing price on 8/11/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.20 | 
                 
                
                    | High | 
                    14.10 | 
                 
                
                    | Low | 
                    12.70 | 
                     
                
                    | Volume | 
                    215,900 | 
                                 
                
                    | Split-adjusted Price | 
                    1.64 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DBC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/11/2011
             | 
            
                +0.70 / +5.26%
             |             
            
                13.20
             |           
            
                14.10
             |               
            
                12.70
             |                           
            
                14.00
             | 
            
                13.90
             |                     
            
                1.64
             |                                 
            
                215,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2011
             | 
            
                +0.70 / +5.56%
             |             
            
                12.90
             |           
            
                13.30
             |               
            
                12.90
             |                           
            
                13.30
             | 
            
                13.28
             |                     
            
                1.56
             |                                 
            
                122,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2011
             | 
            
                -0.60 / -4.55%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.30
             |                           
            
                12.60
             | 
            
                12.47
             |                     
            
                1.48
             |                                 
            
                105,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2011
             | 
            
                -0.40 / -2.94%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.00
             |                           
            
                13.20
             | 
            
                13.16
             |                     
            
                1.55
             |                                 
            
                58,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.70
             |           
            
                13.90
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.63
             |                     
            
                1.60
             |                                 
            
                84,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2011
             | 
            
                +0.50 / +3.82%
             |             
            
                13.20
             |           
            
                13.60
             |               
            
                13.20
             |                           
            
                13.60
             | 
            
                13.51
             |                     
            
                1.60
             |                                 
            
                92,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2011
             | 
            
                +0.30 / +2.34%
             |             
            
                12.90
             |           
            
                13.10
             |               
            
                12.50
             |                           
            
                13.10
             | 
            
                12.78
             |                     
            
                1.54
             |                                 
            
                58,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2011
             | 
            
                -0.60 / -4.48%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                12.70
             |                           
            
                12.80
             | 
            
                12.93
             |                     
            
                1.50
             |                                 
            
                84,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.30
             |           
            
                13.50
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.34
             |                     
            
                1.57
             |                                 
            
                23,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.51
             |                     
            
                1.58
             |                                 
            
                70,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2011
             | 
            
                +0.10 / +0.74%
             |             
            
                13.40
             |           
            
                13.70
             |               
            
                13.30
             |                           
            
                13.60
             | 
            
                13.54
             |                     
            
                1.60
             |                                 
            
                37,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.50
             |           
            
                13.70
             |               
            
                13.30
             |                           
            
                13.50
             | 
            
                13.43
             |                     
            
                1.58
             |                                 
            
                123,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2011
             | 
            
                -0.40 / -2.86%
             |             
            
                14.20
             |           
            
                14.20
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.70
             |                     
            
                1.60
             |                                 
            
                128,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2011
             | 
            
                -0.60 / -4.11%
             |             
            
                14.80
             |           
            
                14.80
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.16
             |                     
            
                1.64
             |                                 
            
                113,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2011
             | 
            
                -0.20 / -1.35%
             |             
            
                14.80
             |           
            
                14.90
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.81
             |                     
            
                1.71
             |                                 
            
                67,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2011
             | 
            
                -0.20 / -1.33%
             |             
            
                15.10
             |           
            
                15.10
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                14.95
             |                     
            
                1.74
             |                                 
            
                101,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2011
             | 
            
                +0.50 / +3.45%
             |             
            
                14.60
             |           
            
                15.00
             |               
            
                14.60
             |                           
            
                15.00
             | 
            
                14.90
             |                     
            
                1.76
             |                                 
            
                55,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2011
             | 
            
                -0.30 / -2.03%
             |             
            
                14.80
             |           
            
                14.80
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.56
             |                     
            
                1.70
             |                                 
            
                75,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.70
             |           
            
                14.90
             |               
            
                14.60
             |                           
            
                14.80
             | 
            
                14.76
             |                     
            
                1.74
             |                                 
            
                101,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2011
             | 
            
                +0.10 / +0.68%
             |             
            
                14.80
             |           
            
                15.00
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                14.86
             |                     
            
                1.74
             |                                 
            
                44,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/14/2011
             | 
            
                -0.20 / -1.34%
             |             
            
                14.80
             |           
            
                15.00
             |               
            
                14.70
             |                           
            
                14.70
             | 
            
                14.80
             |                     
            
                1.72
             |                                 
            
                764,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.10
             |               
            
                14.70
             |                           
            
                14.90
             | 
            
                14.96
             |                     
            
                1.75
             |                                 
            
                29,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2011
             | 
            
                +0.30 / +2.05%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.40
             |                           
            
                14.90
             | 
            
                14.49
             |                     
            
                1.75
             |                                 
            
                54,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/11/2011
             | 
            
                -0.60 / -3.95%
             |             
            
                14.90
             |           
            
                15.00
             |               
            
                14.50
             |                           
            
                14.60
             | 
            
                14.66
             |                     
            
                1.71
             |                                 
            
                143,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/8/2011
             | 
            
                +0.50 / +3.40%
             |             
            
                14.80
             |           
            
                15.20
             |               
            
                14.70
             |                           
            
                15.20
             | 
            
                14.96
             |                     
            
                1.78
             |                                 
            
                65,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/7/2011
             | 
            
                -0.30 / -2.00%
             |             
            
                14.70
             |           
            
                15.00
             |               
            
                14.70
             |                           
            
                14.70
             | 
            
                14.79
             |                     
            
                1.72
             |                                 
            
                100,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/6/2011
             | 
            
                -0.40 / -2.60%
             |             
            
                15.80
             |           
            
                15.80
             |               
            
                14.80
             |                           
            
                15.00
             | 
            
                14.95
             |                     
            
                1.76
             |                                 
            
                35,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2011
             | 
            
                +0.60 / +4.05%
             |             
            
                14.90
             |           
            
                15.60
             |               
            
                14.70
             |                           
            
                15.40
             | 
            
                15.24
             |                     
            
                1.81
             |                                 
            
                376,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2011
             | 
            
                +0.10 / +0.68%
             |             
            
                14.60
             |           
            
                14.80
             |               
            
                14.30
             |                           
            
                14.80
             | 
            
                14.63
             |                     
            
                1.74
             |                                 
            
                59,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2011
             | 
            
                -0.60 / -3.92%
             |             
            
                15.30
             |           
            
                15.40
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.84
             |                     
            
                1.72
             |                                 
            
                189,700
             |  
            
                 
             |                                                              
             
    
         
    
    
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