| 
    
        
            | 
                    Closing price on 9/22/2017
                 |  |  
    
        |           
                
                    | Open | 2.20 |  
                    | High | 2.20 |  
                    | Low | 2.10 |  
                    | Volume | 686,200 |  
                    | Split-adjusted Price | 2.10 |  
                
             | 
 |  ACM Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/22/2017 | -0.10 / -4.55% | 2.20 | 2.20 | 2.10 | 2.10 | 2.11 | 2.10 | 686,200 |   |  
            | 9/21/2017 | +0.10 / +4.76% | 2.20 | 2.20 | 2.10 | 2.20 | 2.15 | 2.20 | 45,300 |   |  			
            | 9/20/2017 | 0.00 / 0.00% | 1.90 | 2.20 | 1.90 | 2.10 | 2.10 | 2.10 | 847,915 |   |  
            | 9/19/2017 | +0.10 / +5.00% | 2.00 | 2.10 | 1.90 | 2.10 | 2.00 | 2.10 | 244,227 |   |  			
            | 9/18/2017 | 0.00 / 0.00% | 2.00 | 2.10 | 1.90 | 2.00 | 2.00 | 2.00 | 383,550 |   |  
            | 9/15/2017 | 0.00 / 0.00% | 1.90 | 2.00 | 1.90 | 2.00 | 1.93 | 2.00 | 242,700 |   |  			
            | 9/14/2017 | 0.00 / 0.00% | 1.90 | 2.00 | 1.90 | 2.00 | 1.95 | 2.00 | 181,232 |   |  
            | 9/13/2017 | 0.00 / 0.00% | 2.10 | 2.10 | 1.90 | 2.00 | 1.96 | 2.00 | 90,300 |   |  			
            | 9/12/2017 | 0.00 / 0.00% | 2.00 | 2.10 | 2.00 | 2.00 | 2.00 | 2.00 | 183,500 |   |  
            | 9/11/2017 | 0.00 / 0.00% | 2.00 | 2.10 | 1.90 | 2.00 | 2.00 | 2.00 | 357,700 |   |  			
            | 9/8/2017 | 0.00 / 0.00% | 2.10 | 2.10 | 2.00 | 2.00 | 2.01 | 2.00 | 211,521 |   |  
            | 9/7/2017 | -0.10 / -4.76% | 2.10 | 2.10 | 2.00 | 2.00 | 2.01 | 2.00 | 275,420 |   |  			
            | 9/6/2017 | +0.10 / +5.00% | 2.10 | 2.10 | 2.00 | 2.10 | 2.02 | 2.10 | 178,453 |   |  
            | 9/5/2017 | -0.10 / -4.76% | 2.00 | 2.10 | 2.00 | 2.00 | 2.03 | 2.00 | 169,200 |   |  			
            | 9/1/2017 | 0.00 / 0.00% | 2.10 | 2.10 | 2.00 | 2.10 | 2.06 | 2.10 | 135,700 |   |  
            | 8/31/2017 | 0.00 / 0.00% | 2.10 | 2.10 | 2.00 | 2.10 | 2.03 | 2.10 | 192,300 |   |  			
            | 8/30/2017 | 0.00 / 0.00% | 2.00 | 2.10 | 2.00 | 2.10 | 2.04 | 2.10 | 113,400 |   |  
            | 8/29/2017 | 0.00 / 0.00% | 2.20 | 2.20 | 2.00 | 2.10 | 2.08 | 2.10 | 322,700 |   |  			
            | 8/28/2017 | 0.00 / 0.00% | 2.10 | 2.20 | 2.10 | 2.10 | 2.11 | 2.10 | 450,613 |   |  
            | 8/25/2017 | +0.10 / +5.00% | 2.10 | 2.20 | 2.00 | 2.10 | 2.12 | 2.10 | 732,692 |   |  			
            | 8/24/2017 | -0.10 / -4.76% | 2.10 | 2.10 | 2.00 | 2.00 | 2.02 | 2.00 | 190,800 |   |  
            | 8/23/2017 | 0.00 / 0.00% | 2.10 | 2.10 | 2.00 | 2.10 | 2.09 | 2.10 | 200,800 |   |  			
            | 8/22/2017 | 0.00 / 0.00% | 2.10 | 2.20 | 2.10 | 2.10 | 2.10 | 2.10 | 472,000 |   |  
            | 8/21/2017 | -0.10 / -4.55% | 2.20 | 2.20 | 2.10 | 2.10 | 2.10 | 2.10 | 207,600 |   |  			
            | 8/18/2017 | 0.00 / 0.00% | 2.10 | 2.20 | 2.10 | 2.20 | 2.15 | 2.20 | 575,956 |   |  
            | 8/17/2017 | -0.10 / -4.35% | 2.20 | 2.30 | 2.10 | 2.20 | 2.20 | 2.20 | 633,000 |   |  			
            | 8/16/2017 | +0.10 / +4.55% | 2.20 | 2.30 | 2.10 | 2.30 | 2.21 | 2.30 | 517,100 |   |  
            | 8/15/2017 | -0.10 / -4.35% | 2.30 | 2.30 | 2.20 | 2.20 | 2.20 | 2.20 | 836,300 |   |  			
            | 8/14/2017 | 0.00 / 0.00% | 2.30 | 2.30 | 2.20 | 2.30 | 2.21 | 2.30 | 416,000 |   |  
            | 8/11/2017 | -0.10 / -4.17% | 2.40 | 2.40 | 2.20 | 2.30 | 2.30 | 2.30 | 1,395,900 |   |  |