| 
    
        
            | 
                    Closing price on 3/21/2019
                 |  |  
    
        |           
                
                    | Open | 0.60 |  
                    | High | 0.70 |  
                    | Low | 0.60 |  
                    | Volume | 70,100 |  
                    | Split-adjusted Price | 0.70 |  
                
             | 
 |  ACM Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/21/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.70 | 0.65 | 0.70 | 70,100 |   |  
            | 3/20/2019 | 0.00 / 0.00% | 0.70 | 0.70 | 0.60 | 0.70 | 0.65 | 0.70 | 99,200 |   |  			
            | 3/19/2019 | -0.10 / -12.50% | 0.70 | 0.80 | 0.70 | 0.70 | 0.70 | 0.70 | 140,400 |   |  
            | 3/18/2019 | +0.10 / +14.29% | 0.70 | 0.80 | 0.60 | 0.80 | 0.71 | 0.80 | 501,200 |   |  			
            | 3/15/2019 | -0.10 / -12.50% | 0.70 | 0.80 | 0.70 | 0.70 | 0.70 | 0.70 | 751,500 |   |  
            | 3/14/2019 | +0.10 / +14.29% | 0.70 | 0.80 | 0.60 | 0.80 | 0.74 | 0.80 | 248,100 |   |  			
            | 3/13/2019 | -0.10 / -12.50% | 0.80 | 0.80 | 0.70 | 0.70 | 0.71 | 0.70 | 232,400 |   |  
            | 3/12/2019 | +0.10 / +14.29% | 0.80 | 0.80 | 0.60 | 0.80 | 0.72 | 0.80 | 559,100 |   |  			
            | 3/11/2019 | -0.10 / -12.50% | 0.70 | 0.80 | 0.70 | 0.70 | 0.71 | 0.70 | 65,800 |   |  
            | 3/8/2019 | 0.00 / 0.00% | 0.70 | 0.80 | 0.70 | 0.80 | 0.78 | 0.80 | 94,100 |   |  			
            | 3/7/2019 | 0.00 / 0.00% | 0.80 | 0.90 | 0.70 | 0.80 | 0.80 | 0.80 | 876,100 |   |  
            | 3/6/2019 | +0.10 / +14.29% | 0.70 | 0.80 | 0.70 | 0.80 | 0.71 | 0.80 | 1,715,300 |   |  			
            | 3/5/2019 | +0.10 / +16.67% | 0.70 | 0.70 | 0.60 | 0.70 | 0.68 | 0.70 | 50,600 |   |  
            | 3/4/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.60 | 0.63 | 0.60 | 79,100 |   |  			
            | 3/1/2019 | +0.10 / +20.00% | 0.50 | 0.60 | 0.50 | 0.60 | 0.60 | 0.60 | 111,700 |   |  
            | 2/28/2019 | -0.10 / -16.67% | 0.70 | 0.70 | 0.50 | 0.50 | 0.60 | 0.50 | 456,900 |   |  			
            | 2/27/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.60 | 0.60 | 0.60 | 55,900 |   |  
            | 2/26/2019 | 0.00 / 0.00% | 0.70 | 0.70 | 0.60 | 0.60 | 0.60 | 0.60 | 24,700 |   |  			
            | 2/25/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.60 | 0.62 | 0.60 | 52,200 |   |  
            | 2/22/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.50 | 0.60 | 0.62 | 0.60 | 82,900 |   |  			
            | 2/21/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.50 | 0.60 | 0.60 | 0.60 | 303,800 |   |  
            | 2/20/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.60 | 0.61 | 0.60 | 143,900 |   |  			
            | 2/19/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.50 | 0.60 | 0.60 | 0.60 | 232,600 |   |  
            | 2/18/2019 | 0.00 / 0.00% | 0.70 | 0.70 | 0.60 | 0.60 | 0.60 | 0.60 | 325,200 |   |  			
            | 2/15/2019 | -0.10 / -14.29% | 0.70 | 0.70 | 0.60 | 0.60 | 0.63 | 0.60 | 104,100 |   |  
            | 2/14/2019 | +0.10 / +16.67% | 0.70 | 0.70 | 0.60 | 0.70 | 0.65 | 0.70 | 204,300 |   |  			
            | 2/13/2019 | 0.00 / 0.00% | 0.60 | 0.70 | 0.60 | 0.60 | 0.64 | 0.60 | 212,400 |   |  
            | 2/12/2019 | +0.10 / +20.00% | 0.60 | 0.60 | 0.50 | 0.60 | 0.59 | 0.60 | 597,300 |   |  			
            | 2/11/2019 | -0.10 / -16.67% | 0.60 | 0.60 | 0.50 | 0.50 | 0.54 | 0.50 | 97,600 |   |  
            | 2/1/2019 | +0.10 / +20.00% | 0.60 | 0.60 | 0.50 | 0.60 | 0.54 | 0.60 | 57,500 |   |  |