Exhibit 99.1
SIGNATURE
After reasonable inquiry and to the best of the undersigned’s knowledge and belief, the undersigned certifies that the information set forth in this Form 4 is true, complete and correct.
Dated: December 17, 2010
         
  INVESTMENT CORPORATION OF DUBAI
 
 
  By:   /s/ Khalifa Al Daboos    
  Name:   Khalifa Al Daboos   
  Title:   Director   
 
  BORSE DUBAI LIMITED
 
 
  By:   /s/ Essa Kazim    
  Name:   Essa Kazim   
  Title:   Chairman   
 
  By:   /s/ Marwan Lutfi    
  Name:   Marwan Lutfi   
  Title:   Director   
 
  BORSE DUBAI NASDAQ SHARE TRUST
 
 
  By:   Borse Dubai Limited, authorized signatory    
 
  By:   /s/ Essa Kazim    
  Name:   Essa Kazim   
  Title:   Chairman   
 
  By:   /s/ Marwan Lutfi    
  Name:   Marwan Lutfi   
  Title:   Director