497 1 c64129fe497.htm 497 e497
[On Chapman and Cutler LLP Letterhead]
May 9, 2011
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
         
Re:
  First Trust Exchange-Traded AlphaDEX® Fund    
 
                      (Registration Nos. 333-140895, 811-22019)                        
Ladies and Gentlemen:
     On behalf of First Trust Exchange-Traded AlphaDEX® Fund (the “Registrant”), we are transmitting for electronic filing pursuant to Rule 497(e) under the Securities Act of 1933, as amended, exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information contained in the Registrant’s 497(c) filing on April 19, 2011. The Registration Statement relates to First Trust Mid Cap Growth AlphaDEX® Fund, First Trust Mid Cap Value AlphaDEX® Fund, First Trust Small Cap Growth AlphaDEX® Fund and First Trust Small Cap Value AlphaDEX® Fund, each a series of First Trust Exchange-Traded AlphaDEX® Fund.
     If you have any questions or comments, please telephone the undersigned at (312) 845-3484.
         
  Very truly yours,

Chapman and Cutler llp
 		  
  By:   /s/ Morrison C. Warren   
    Morrison C. Warren   
       
 
Enclosures