| 
                 
                    Closing price on 4/18/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.00 | 
                 
                
                    | High | 
                    12.40 | 
                 
                
                    | Low | 
                    11.80 | 
                     
                
                    | Volume | 
                    8,032,746 | 
                                 
                
                    | Split-adjusted Price | 
                    11.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVX Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/18/2012
             | 
            
                -0.20 / -1.65%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                12.08
             |                     
            
                11.90
             |                                 
            
                8,032,746
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                -0.50 / -3.97%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.00
             |                           
            
                12.10
             | 
            
                12.37
             |                     
            
                12.10
             |                                 
            
                6,738,021
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +0.70 / +5.88%
             |             
            
                11.10
             |           
            
                12.70
             |               
            
                11.10
             |                           
            
                12.60
             | 
            
                12.31
             |                     
            
                12.60
             |                                 
            
                7,189,651
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                12.00
             |                     
            
                11.90
             |                                 
            
                7,309,041
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                -0.20 / -1.65%
             |             
            
                12.50
             |           
            
                12.60
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                12.33
             |                     
            
                11.90
             |                                 
            
                8,923,366
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                +0.70 / +6.14%
             |             
            
                11.60
             |           
            
                12.10
             |               
            
                11.50
             |                           
            
                12.10
             | 
            
                11.86
             |                     
            
                12.10
             |                                 
            
                10,415,238
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2012
             | 
            
                -0.50 / -4.20%
             |             
            
                11.70
             |           
            
                12.10
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.65
             |                     
            
                11.40
             |                                 
            
                6,438,317
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +0.50 / +4.39%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.40
             |                           
            
                11.90
             | 
            
                11.75
             |                     
            
                11.90
             |                                 
            
                5,836,734
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2012
             | 
            
                +0.10 / +0.88%
             |             
            
                11.50
             |           
            
                11.90
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.64
             |                     
            
                11.40
             |                                 
            
                8,041,617
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                +0.70 / +6.60%
             |             
            
                10.60
             |           
            
                11.30
             |               
            
                10.40
             |                           
            
                11.30
             | 
            
                11.09
             |                     
            
                11.30
             |                                 
            
                9,736,931
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                -0.40 / -3.64%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                10.60
             | 
            
                10.87
             |                     
            
                10.60
             |                                 
            
                4,221,783
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.70 / +6.80%
             |             
            
                10.30
             |           
            
                11.00
             |               
            
                10.30
             |                           
            
                11.00
             | 
            
                10.77
             |                     
            
                11.00
             |                                 
            
                5,572,881
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                -0.30 / -2.83%
             |             
            
                10.60
             |           
            
                10.80
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.38
             |                     
            
                10.30
             |                                 
            
                5,666,541
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.50 / -4.50%
             |             
            
                11.20
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                10.60
             | 
            
                10.82
             |                     
            
                10.60
             |                                 
            
                8,806,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.60
             |           
            
                11.40
             |               
            
                10.40
             |                           
            
                11.10
             | 
            
                10.90
             |                     
            
                11.10
             |                                 
            
                7,335,299
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                -0.60 / -5.13%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.48
             |                     
            
                11.10
             |                                 
            
                8,189,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2012
             | 
            
                -0.40 / -3.31%
             |             
            
                12.20
             |           
            
                12.50
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                12.10
             |                     
            
                11.70
             |                                 
            
                7,007,018
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2012
             | 
            
                +0.60 / +5.22%
             |             
            
                11.40
             |           
            
                12.10
             |               
            
                11.40
             |                           
            
                12.10
             | 
            
                11.94
             |                     
            
                12.10
             |                                 
            
                11,650,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2012
             | 
            
                +0.30 / +2.68%
             |             
            
                11.30
             |           
            
                11.70
             |               
            
                11.00
             |                           
            
                11.50
             | 
            
                11.38
             |                     
            
                11.50
             |                                 
            
                7,464,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                +0.20 / +1.82%
             |             
            
                11.00
             |           
            
                11.60
             |               
            
                11.00
             |                           
            
                11.20
             | 
            
                11.39
             |                     
            
                11.20
             |                                 
            
                8,241,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +0.50 / +4.76%
             |             
            
                10.80
             |           
            
                11.20
             |               
            
                10.60
             |                           
            
                11.00
             | 
            
                10.91
             |                     
            
                11.00
             |                                 
            
                9,012,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                +0.40 / +3.96%
             |             
            
                10.10
             |           
            
                10.80
             |               
            
                9.90
             |                           
            
                10.50
             | 
            
                10.45
             |                     
            
                10.50
             |                                 
            
                8,452,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                +0.20 / +2.02%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                10.10
             |                                 
            
                10,487,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.80 / +8.79%
             |             
            
                9.20
             |           
            
                9.90
             |               
            
                8.90
             |                           
            
                9.90
             | 
            
                9.53
             |                     
            
                9.90
             |                                 
            
                8,045,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                -0.40 / -4.21%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.25
             |                     
            
                9.10
             |                                 
            
                3,939,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                +0.20 / +2.15%
             |             
            
                9.40
             |           
            
                9.60
             |               
            
                9.20
             |                           
            
                9.50
             | 
            
                9.44
             |                     
            
                9.50
             |                                 
            
                3,203,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2012
             | 
            
                -0.60 / -6.06%
             |             
            
                9.80
             |           
            
                10.00
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.34
             |                     
            
                9.30
             |                                 
            
                6,202,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2012
             | 
            
                +0.10 / +1.02%
             |             
            
                9.80
             |           
            
                10.30
             |               
            
                9.50
             |                           
            
                9.90
             | 
            
                9.82
             |                     
            
                9.90
             |                                 
            
                3,139,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2012
             | 
            
                -0.70 / -6.67%
             |             
            
                10.00
             |           
            
                10.40
             |               
            
                9.70
             |                           
            
                9.80
             | 
            
                10.00
             |                     
            
                9.80
             |                                 
            
                7,401,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.80
             |               
            
                10.10
             |                           
            
                10.50
             | 
            
                10.39
             |                     
            
                10.50
             |                                 
            
                7,381,600
             |  
            
                 
             |                                                              
             
    
         
    
    
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