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            | 
                 
                    Closing price on 1/22/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    3.60 | 
                 
                
                    | High | 
                    3.80 | 
                 
                
                    | Low | 
                    3.60 | 
                     
                
                    | Volume | 
                    404,300 | 
                                 
                
                    | Split-adjusted Price | 
                    2.46 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
MST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/22/2018
             | 
            
                +0.10 / +2.86%
             |             
            
                3.60
             |           
            
                3.80
             |               
            
                3.60
             |                           
            
                3.60
             | 
            
                3.73
             |                     
            
                2.46
             |                                 
            
                404,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2018
             | 
            
                -0.20 / -5.41%
             |             
            
                3.60
             |           
            
                3.80
             |               
            
                3.50
             |                           
            
                3.50
             | 
            
                3.63
             |                     
            
                2.39
             |                                 
            
                441,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2018
             | 
            
                -0.10 / -2.63%
             |             
            
                3.70
             |           
            
                3.70
             |               
            
                3.60
             |                           
            
                3.70
             | 
            
                3.65
             |                     
            
                2.52
             |                                 
            
                303,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2018
             | 
            
                -0.20 / -5.00%
             |             
            
                4.00
             |           
            
                4.00
             |               
            
                3.80
             |                           
            
                3.80
             | 
            
                3.82
             |                     
            
                2.59
             |                                 
            
                253,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2018
             | 
            
                +0.20 / +5.26%
             |             
            
                3.90
             |           
            
                4.00
             |               
            
                3.80
             |                           
            
                4.00
             | 
            
                3.89
             |                     
            
                2.73
             |                                 
            
                193,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2018
             | 
            
                -0.10 / -2.56%
             |             
            
                3.90
             |           
            
                4.00
             |               
            
                3.80
             |                           
            
                3.80
             | 
            
                3.83
             |                     
            
                2.59
             |                                 
            
                189,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2018
             | 
            
                -0.10 / -2.50%
             |             
            
                4.00
             |           
            
                4.10
             |               
            
                3.90
             |                           
            
                3.90
             | 
            
                3.96
             |                     
            
                2.66
             |                                 
            
                232,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2018
             | 
            
                -0.20 / -4.76%
             |             
            
                4.20
             |           
            
                4.20
             |               
            
                3.90
             |                           
            
                4.00
             | 
            
                4.01
             |                     
            
                2.73
             |                                 
            
                411,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2018
             | 
            
                -0.10 / -2.33%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.00
             |                           
            
                4.20
             | 
            
                4.14
             |                     
            
                2.87
             |                                 
            
                391,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2018
             | 
            
                +0.30 / +7.50%
             |             
            
                4.00
             |           
            
                4.30
             |               
            
                3.90
             |                           
            
                4.30
             | 
            
                4.11
             |                     
            
                2.93
             |                                 
            
                412,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/8/2018
             | 
            
                -0.40 / -9.09%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.00
             |                           
            
                4.00
             | 
            
                4.19
             |                     
            
                2.73
             |                                 
            
                627,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2018
             | 
            
                +0.30 / +7.32%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.10
             |                           
            
                4.40
             | 
            
                4.44
             |                     
            
                3.00
             |                                 
            
                1,066,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2018
             | 
            
                +0.30 / +7.89%
             |             
            
                4.00
             |           
            
                4.10
             |               
            
                4.00
             |                           
            
                4.10
             | 
            
                4.08
             |                     
            
                2.80
             |                                 
            
                235,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/3/2018
             | 
            
                +0.30 / +8.57%
             |             
            
                3.50
             |           
            
                3.80
             |               
            
                3.50
             |                           
            
                3.80
             | 
            
                3.57
             |                     
            
                2.59
             |                                 
            
                1,436,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/2/2018
             | 
            
                +0.10 / +2.94%
             |             
            
                3.40
             |           
            
                3.60
             |               
            
                3.10
             |                           
            
                3.50
             | 
            
                3.38
             |                     
            
                2.39
             |                                 
            
                1,407,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2017
             | 
            
                -0.20 / -5.56%
             |             
            
                3.40
             |           
            
                3.50
             |               
            
                3.30
             |                           
            
                3.40
             | 
            
                3.34
             |                     
            
                2.32
             |                                 
            
                1,179,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2017
             | 
            
                -0.30 / -7.69%
             |             
            
                3.90
             |           
            
                3.90
             |               
            
                3.60
             |                           
            
                3.60
             | 
            
                3.68
             |                     
            
                2.46
             |                                 
            
                710,090
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2017
             | 
            
                0.00 / 0.00%
             |             
            
                4.10
             |           
            
                4.10
             |               
            
                3.80
             |                           
            
                3.90
             | 
            
                3.90
             |                     
            
                2.66
             |                                 
            
                269,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/26/2017
             | 
            
                -0.20 / -4.88%
             |             
            
                3.70
             |           
            
                4.30
             |               
            
                3.70
             |                           
            
                3.90
             | 
            
                3.98
             |                     
            
                2.66
             |                                 
            
                1,616,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/25/2017
             | 
            
                -0.40 / -8.89%
             |             
            
                4.10
             |           
            
                4.50
             |               
            
                4.10
             |                           
            
                4.10
             | 
            
                4.10
             |                     
            
                2.80
             |                                 
            
                1,080,511
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2017
             | 
            
                -0.40 / -8.16%
             |             
            
                4.50
             |           
            
                4.90
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                3.07
             |                                 
            
                1,398,900
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2017
             | 
            
                -0.40 / -7.55%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.83
             |                     
            
                3.34
             |                                 
            
                1,931,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/20/2017
             | 
            
                +0.40 / +8.16%
             |             
            
                4.50
             |           
            
                5.30
             |               
            
                4.50
             |                           
            
                5.30
             | 
            
                4.67
             |                     
            
                3.62
             |                                 
            
                3,452,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/19/2017
             | 
            
                -0.50 / -9.26%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.91
             |                     
            
                3.34
             |                                 
            
                767,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/18/2017
             | 
            
                -0.50 / -8.47%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                3.68
             |                                 
            
                1,111,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/15/2017
             | 
            
                -0.60 / -9.23%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                4.02
             |                                 
            
                1,800,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/14/2017
             | 
            
                -0.70 / -9.72%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.57
             |                     
            
                4.43
             |                                 
            
                1,527,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2017
             | 
            
                +0.60 / +9.09%
             |             
            
                6.00
             |           
            
                7.20
             |               
            
                6.00
             |                           
            
                7.20
             | 
            
                6.23
             |                     
            
                4.91
             |                                 
            
                2,500,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/12/2017
             | 
            
                -0.70 / -9.59%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.61
             |                     
            
                4.50
             |                                 
            
                1,071,200
             |            
            
                 
             |                                       
         
    
        
            | 
                12/11/2017
             | 
            
                -0.40 / -5.19%
             |             
            
                7.60
             |           
            
                7.60
             |               
            
                7.00
             |                           
            
                7.30
             | 
            
                7.00
             |                     
            
                4.98
             |                                 
            
                2,268,900
             |  
            
                 
             |                                                              
             
    
         
    
    
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						| 
 Market Update 
        
            
                Last updated at 3:10:02 PM
                                                                
            
            
            
            
        
        
     
 
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