| 
    
        
            | 
                    Closing price on 6/17/2020
                 |  |  
    
        |           
                
                    | Open | 1.74 |  
                    | High | 1.76 |  
                    | Low | 1.69 |  
                    | Volume | 308,620 |  
                    | Split-adjusted Price | 1.58 |  
                
             | 
 |  VOS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/17/2020 | -0.04 / -2.30% | 1.74 | 1.76 | 1.69 | 1.70 | 1.70 | 1.58 | 308,620 |   |  
            | 6/16/2020 | +0.08 / +4.82% | 1.66 | 1.75 | 1.63 | 1.74 | 1.70 | 1.62 | 709,300 |   |  			
            | 6/15/2020 | -0.04 / -2.35% | 1.76 | 1.76 | 1.62 | 1.66 | 1.70 | 1.55 | 682,770 |   |  
            | 6/12/2020 | 0.00 / 0.00% | 1.59 | 1.70 | 1.59 | 1.70 | 1.66 | 1.58 | 793,230 |   |  			
            | 6/11/2020 | +0.04 / +2.41% | 1.77 | 1.77 | 1.70 | 1.70 | 1.76 | 1.58 | 1,380,270 |   |  
            | 6/10/2020 | +0.10 / +6.41% | 1.54 | 1.66 | 1.50 | 1.66 | 1.63 | 1.55 | 1,626,860 |   |  			
            | 6/9/2020 | -0.05 / -3.11% | 1.65 | 1.66 | 1.56 | 1.56 | 1.60 | 1.45 | 516,720 |   |  
            | 6/8/2020 | +0.04 / +2.55% | 1.63 | 1.66 | 1.58 | 1.61 | 1.63 | 1.50 | 831,840 |   |  			
            | 6/5/2020 | +0.09 / +6.08% | 1.48 | 1.57 | 1.46 | 1.57 | 1.50 | 1.46 | 690,110 |   |  
            | 6/4/2020 | -0.01 / -0.67% | 1.49 | 1.50 | 1.45 | 1.48 | 1.47 | 1.38 | 443,580 |   |  			
            | 6/3/2020 | 0.00 / 0.00% | 1.50 | 1.50 | 1.46 | 1.49 | 1.47 | 1.39 | 182,910 |   |  
            | 6/2/2020 | +0.01 / +0.68% | 1.50 | 1.51 | 1.48 | 1.49 | 1.50 | 1.39 | 446,070 |   |  			
            | 6/1/2020 | +0.04 / +2.78% | 1.44 | 1.51 | 1.40 | 1.48 | 1.47 | 1.38 | 875,630 |   |  
            | 5/29/2020 | +0.04 / +2.86% | 1.41 | 1.45 | 1.38 | 1.44 | 1.41 | 1.34 | 349,850 |   |  			
            | 5/28/2020 | -0.02 / -1.41% | 1.42 | 1.43 | 1.40 | 1.40 | 1.40 | 1.30 | 24,250 |   |  
            | 5/27/2020 | 0.00 / 0.00% | 1.42 | 1.45 | 1.41 | 1.42 | 1.43 | 1.32 | 196,420 |   |  			
            | 5/26/2020 | +0.03 / +2.16% | 1.39 | 1.46 | 1.37 | 1.42 | 1.42 | 1.32 | 419,550 |   |  
            | 5/25/2020 | -0.05 / -3.47% | 1.44 | 1.44 | 1.37 | 1.39 | 1.39 | 1.29 | 256,120 |   |  			
            | 5/22/2020 | -0.03 / -2.04% | 1.47 | 1.47 | 1.42 | 1.44 | 1.45 | 1.34 | 155,930 |   |  
            | 5/21/2020 | +0.09 / +6.52% | 1.39 | 1.47 | 1.37 | 1.47 | 1.44 | 1.37 | 1,011,330 |   |  			
            | 5/20/2020 | +0.01 / +0.73% | 1.37 | 1.41 | 1.36 | 1.38 | 1.36 | 1.28 | 179,660 |   |  
            | 5/19/2020 | -0.02 / -1.44% | 1.39 | 1.39 | 1.37 | 1.37 | 1.39 | 1.28 | 69,900 |   |  			
            | 5/18/2020 | -0.01 / -0.71% | 1.39 | 1.40 | 1.38 | 1.39 | 1.39 | 1.29 | 77,100 |   |  
            | 5/15/2020 | -0.02 / -1.41% | 1.42 | 1.42 | 1.37 | 1.40 | 1.38 | 1.30 | 99,080 |   |  			
            | 5/14/2020 | -0.01 / -0.70% | 1.43 | 1.43 | 1.40 | 1.42 | 1.41 | 1.32 | 123,930 |   |  
            | 5/13/2020 | +0.07 / +5.15% | 1.36 | 1.45 | 1.36 | 1.43 | 1.42 | 1.33 | 328,210 |   |  			
            | 5/12/2020 | 0.00 / 0.00% | 1.36 | 1.38 | 1.35 | 1.36 | 1.35 | 1.27 | 51,040 |   |  
            | 5/11/2020 | 0.00 / 0.00% | 1.36 | 1.36 | 1.33 | 1.36 | 1.34 | 1.27 | 153,700 |   |  			
            | 5/8/2020 | 0.00 / 0.00% | 1.37 | 1.38 | 1.34 | 1.36 | 1.35 | 1.27 | 76,770 |   |  
            | 5/7/2020 | 0.00 / 0.00% | 1.36 | 1.36 | 1.34 | 1.36 | 1.35 | 1.27 | 99,920 |   |  |