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                    Closing price on 8/25/2011
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                    | Open | 5.20 |  
                    | High | 5.20 |  
                    | Low | 5.00 |  
                    | Volume | 55,400 |  
                    | Split-adjusted Price | 5.10 |  
                
             | 
 |  V15 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/25/2011 | -0.10 / -1.92% | 5.20 | 5.20 | 5.00 | 5.10 | 5.10 | 5.10 | 55,400 |   |  
            | 8/24/2011 | -0.10 / -1.89% | 5.40 | 5.40 | 5.20 | 5.20 | 5.20 | 5.20 | 29,000 |   |  			
            | 8/23/2011 | +0.10 / +1.92% | 5.50 | 5.50 | 5.10 | 5.30 | 5.30 | 5.30 | 75,800 |   |  
            | 8/22/2011 | +0.40 / +8.33% | 5.00 | 5.20 | 5.00 | 5.20 | 5.20 | 5.20 | 97,700 |   |  			
            | 8/19/2011 | -0.20 / -4.00% | 5.00 | 5.00 | 4.80 | 4.80 | 5.00 | 4.80 | 22,300 |   |  
            | 8/18/2011 | 0.00 / 0.00% | 5.30 | 5.30 | 5.00 | 5.00 | 5.00 | 5.00 | 126,200 |   |  			
            | 8/17/2011 | +0.10 / +2.04% | 5.00 | 5.20 | 4.90 | 5.00 | 5.00 | 5.00 | 69,400 |   |  
            | 8/16/2011 | +0.10 / +2.08% | 4.90 | 5.00 | 4.80 | 4.90 | 4.90 | 4.90 | 14,500 |   |  			
            | 8/15/2011 | 0.00 / 0.00% | 4.80 | 4.90 | 4.80 | 4.80 | 4.80 | 4.80 | 12,500 |   |  
            | 8/12/2011 | +0.10 / +2.13% | 4.80 | 4.80 | 4.70 | 4.80 | 4.70 | 4.80 | 11,900 |   |  			
            | 8/11/2011 | -0.10 / -2.08% | 4.50 | 4.70 | 4.50 | 4.70 | 4.70 | 4.70 | 7,700 |   |  
            | 8/10/2011 | +0.10 / +2.13% | 4.80 | 4.90 | 4.60 | 4.80 | 4.80 | 4.80 | 40,700 |   |  			
            | 8/9/2011 | -0.20 / -4.08% | 4.90 | 4.90 | 4.70 | 4.70 | 4.70 | 4.70 | 65,300 |   |  
            | 8/8/2011 | -0.20 / -3.92% | 5.10 | 5.10 | 4.90 | 4.90 | 4.90 | 4.90 | 25,500 |   |  			
            | 8/5/2011 | -0.30 / -5.56% | 5.30 | 5.40 | 5.10 | 5.10 | 5.40 | 5.10 | 103,200 |   |  
            | 8/4/2011 | +0.20 / +3.85% | 5.20 | 5.40 | 5.20 | 5.40 | 5.40 | 5.40 | 31,800 |   |  			
            | 8/3/2011 | +0.30 / +6.12% | 5.10 | 5.20 | 4.90 | 5.20 | 5.20 | 5.20 | 12,900 |   |  
            | 8/2/2011 | -0.30 / -5.77% | 5.20 | 5.20 | 4.90 | 4.90 | 4.90 | 4.90 | 91,400 |   |  			
            | 8/1/2011 | -0.40 / -7.14% | 5.50 | 5.60 | 5.20 | 5.20 | 5.20 | 5.20 | 143,800 |   |  
            | 7/29/2011 | 0.00 / 0.00% | 5.80 | 5.80 | 5.40 | 5.60 | 5.60 | 5.60 | 53,200 |   |  			
            | 7/28/2011 | 0.00 / 0.00% | 5.60 | 5.80 | 5.60 | 5.60 | 5.60 | 5.60 | 54,200 |   |  
            | 7/27/2011 | 0.00 / 0.00% | 5.60 | 5.60 | 5.50 | 5.60 | 5.60 | 5.60 | 17,900 |   |  			
            | 7/26/2011 | -0.20 / -3.45% | 5.80 | 6.00 | 5.50 | 5.60 | 5.60 | 5.60 | 25,700 |   |  
            | 7/25/2011 | -0.50 / -7.94% | 6.00 | 6.00 | 5.80 | 5.80 | 5.80 | 5.80 | 68,000 |   |  			
            | 7/22/2011 | +0.10 / +1.61% | 6.40 | 6.40 | 5.90 | 6.30 | 6.20 | 6.30 | 56,000 |   |  
            | 7/21/2011 | -0.30 / -4.62% | 6.60 | 6.60 | 6.20 | 6.20 | 6.20 | 6.20 | 56,500 |   |  			
            | 7/20/2011 | 0.00 / 0.00% | 6.40 | 6.60 | 6.20 | 6.50 | 6.50 | 6.50 | 56,400 |   |  
            | 7/19/2011 | -0.30 / -4.41% | 6.50 | 6.50 | 6.40 | 6.50 | 6.50 | 6.50 | 8,500 |   |  			
            | 7/18/2011 | +0.20 / +3.03% | 6.70 | 6.80 | 6.60 | 6.80 | 6.80 | 6.80 | 17,800 |   |  
            | 7/15/2011 | -0.20 / -2.94% | 6.60 | 6.70 | 6.60 | 6.60 | 6.63 | 6.60 | 11,600 |   |  |