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                    Closing price on 11/3/2011
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        |           
                
                    | Open | 5.00 |  
                    | High | 5.30 |  
                    | Low | 5.00 |  
                    | Volume | 47,900 |  
                    | Split-adjusted Price | 4.55 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 11/3/2011 | 0.00 / 0.00% | 5.00 | 5.30 | 5.00 | 5.30 | 5.28 | 4.55 | 47,900 |   |  
            | 11/2/2011 | +0.10 / +1.92% | 5.30 | 5.30 | 5.30 | 5.30 | 5.30 | 4.55 | 100 |   |  			
            | 11/1/2011 | -0.10 / -1.89% | 5.60 | 5.60 | 5.20 | 5.20 | 5.55 | 4.47 | 61,700 |   |  
            | 10/31/2011 | 0.00 / 0.00% | 5.50 | 5.50 | 5.20 | 5.30 | 5.46 | 4.55 | 64,100 |   |  			
            | 10/28/2011 | +0.30 / +6.00% | 5.20 | 5.30 | 5.10 | 5.30 | 5.21 | 4.55 | 96,400 |   |  
            | 10/27/2011 | +0.30 / +6.38% | 5.00 | 5.00 | 4.90 | 5.00 | 5.00 | 4.29 | 69,400 |   |  			
            | 10/26/2011 | -0.30 / -6.00% | 4.90 | 5.00 | 4.70 | 4.70 | 4.92 | 4.04 | 99,800 |   |  
            | 10/25/2011 | -0.30 / -5.66% | 5.00 | 5.00 | 5.00 | 5.00 | 5.00 | 4.29 | 3,700 |   |  			
            | 10/24/2011 | -0.30 / -5.36% | 5.30 | 5.30 | 5.30 | 5.30 | 5.30 | 4.55 | 100 |   |  
            | 10/21/2011 | -0.20 / -3.45% | 5.60 | 5.60 | 5.60 | 5.60 | 5.60 | 4.81 | 300 |   |  			
            | 10/20/2011 | +0.30 / +5.45% | 5.80 | 5.80 | 5.80 | 5.80 | 5.80 | 4.98 | 0 |   |  
            | 10/19/2011 | +0.10 / +1.85% | 5.90 | 5.90 | 5.50 | 5.50 | 5.83 | 4.72 | 42,600 |   |  			
            | 10/18/2011 | -0.40 / -6.90% | 5.90 | 5.90 | 5.40 | 5.40 | 5.86 | 4.64 | 38,300 |   |  
            | 10/17/2011 | +0.40 / +7.41% | 5.80 | 5.80 | 5.80 | 5.80 | 5.80 | 4.98 | 0 |   |  			
            | 10/14/2011 | -0.10 / -1.82% | 5.60 | 5.90 | 5.40 | 5.40 | 5.78 | 4.64 | 94,500 |   |  
            | 10/13/2011 | -0.40 / -6.78% | 5.50 | 5.70 | 5.50 | 5.50 | 5.68 | 4.72 | 67,300 |   |  			
            | 10/12/2011 | 0.00 / 0.00% | 5.90 | 5.90 | 5.90 | 5.90 | 5.90 | 5.07 | 100 |   |  
            | 10/11/2011 | -0.30 / -4.84% | 6.50 | 6.50 | 5.90 | 5.90 | 6.35 | 5.07 | 45,600 |   |  			
            | 10/10/2011 | 0.00 / 0.00% | 6.40 | 6.40 | 6.20 | 6.20 | 6.32 | 5.32 | 50,500 |   |  
            | 10/7/2011 | -0.20 / -3.13% | 6.60 | 6.70 | 6.20 | 6.20 | 6.62 | 5.32 | 127,700 |   |  			
            | 10/6/2011 | +0.10 / +1.59% | 6.70 | 6.70 | 6.40 | 6.40 | 6.60 | 5.50 | 196,000 |   |  
            | 10/5/2011 | -0.30 / -4.55% | 6.70 | 6.90 | 6.30 | 6.30 | 6.77 | 5.41 | 179,700 |   |  			
            | 10/4/2011 | -0.20 / -2.94% | 6.70 | 6.70 | 6.60 | 6.60 | 6.65 | 5.67 | 154,300 |   |  
            | 10/3/2011 | -0.40 / -5.56% | 7.30 | 7.30 | 6.80 | 6.80 | 7.04 | 5.84 | 40,300 |   |  			
            | 9/30/2011 | +0.30 / +4.35% | 7.50 | 7.50 | 7.00 | 7.20 | 7.32 | 6.18 | 202,400 |   |  
            | 9/29/2011 | -0.40 / -5.48% | 7.70 | 7.70 | 6.90 | 6.90 | 7.51 | 5.93 | 133,200 |   |  			
            | 9/28/2011 | 0.00 / 0.00% | 7.80 | 7.80 | 7.30 | 7.30 | 7.44 | 6.27 | 187,900 |   |  
            | 9/27/2011 | +0.20 / +2.82% | 7.90 | 7.90 | 7.30 | 7.30 | 7.76 | 6.27 | 102,000 |   |  			
            | 9/26/2011 | -0.80 / -10.13% | 7.90 | 8.00 | 7.10 | 7.10 | 7.79 | 6.10 | 223,100 |   |  
            | 9/23/2011 | +0.40 / +5.33% | 7.80 | 7.90 | 7.70 | 7.90 | 7.83 | 6.78 | 237,700 |   |  |