On 12/13/12, Allegheny Technologies, Inc (ATI) will trade ex-dividend, for its quarterly dividend of $0.18, payable on 12/28/12. As a percentage of ATI's recent stock price of $28.20, this dividend works out to approximately 0.64%, so look for shares of Allegheny Technologies, Inc to trade 0.64% lower all else being equal when ATI shares open for trading on 12/13/12.