| 
                 
                    Closing price on 3/28/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.60 | 
                 
                
                    | High | 
                    11.40 | 
                 
                
                    | Low | 
                    10.40 | 
                     
                
                    | Volume | 
                    7,335,299 | 
                                 
                
                    | Split-adjusted Price | 
                    11.10 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVX Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2012
             | 
            
                -0.20 / -1.87%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.20
             |                           
            
                10.50
             | 
            
                10.79
             |                     
            
                10.50
             |                                 
            
                11,550,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2012
             | 
            
                +0.60 / +5.94%
             |             
            
                10.60
             |           
            
                10.70
             |               
            
                10.40
             |                           
            
                10.70
             | 
            
                10.69
             |                     
            
                10.70
             |                                 
            
                1,866,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2012
             | 
            
                +0.60 / +6.32%
             |             
            
                9.50
             |           
            
                10.10
             |               
            
                9.50
             |                           
            
                10.10
             | 
            
                9.96
             |                     
            
                10.10
             |                                 
            
                7,052,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2012
             | 
            
                -0.20 / -2.06%
             |             
            
                9.60
             |           
            
                9.80
             |               
            
                9.20
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                4,775,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/29/2012
             | 
            
                +0.30 / +3.19%
             |             
            
                9.40
             |           
            
                9.80
             |               
            
                9.20
             |                           
            
                9.70
             | 
            
                9.50
             |                     
            
                9.70
             |                                 
            
                4,921,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2012
             | 
            
                -0.80 / -7.84%
             |             
            
                10.10
             |           
            
                10.20
             |               
            
                9.40
             |                           
            
                9.40
             | 
            
                9.64
             |                     
            
                9.40
             |                                 
            
                7,352,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2012
             | 
            
                +0.20 / +2.00%
             |             
            
                9.90
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                10.20
             | 
            
                10.09
             |                     
            
                10.20
             |                                 
            
                6,708,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                10.00
             | 
            
                10.07
             |                     
            
                10.00
             |                                 
            
                6,871,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2012
             | 
            
                +0.30 / +3.09%
             |             
            
                9.70
             |           
            
                10.00
             |               
            
                9.50
             |                           
            
                10.00
             | 
            
                9.90
             |                     
            
                10.00
             |                                 
            
                4,863,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2012
             | 
            
                +0.80 / +8.99%
             |             
            
                8.80
             |           
            
                9.70
             |               
            
                8.70
             |                           
            
                9.70
             | 
            
                9.41
             |                     
            
                9.70
             |                                 
            
                8,922,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2012
             | 
            
                +0.20 / +2.30%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                8.70
             |                           
            
                8.90
             | 
            
                9.12
             |                     
            
                8.90
             |                                 
            
                10,610,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2012
             | 
            
                +0.30 / +3.57%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.40
             |                           
            
                8.70
             | 
            
                8.67
             |                     
            
                8.70
             |                                 
            
                2,086,299
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2012
             | 
            
                +0.40 / +5.00%
             |             
            
                7.90
             |           
            
                8.40
             |               
            
                7.90
             |                           
            
                8.40
             | 
            
                8.25
             |                     
            
                8.40
             |                                 
            
                4,060,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2012
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.00
             | 
            
                7.91
             |                     
            
                8.00
             |                                 
            
                2,284,900
             |  
            
                 
             |                                                              
             
    
         
    
    
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