On 12/10/12, Hewlett-Packard Co (HPQ) will trade ex-dividend, for its quarterly dividend of $0.132, payable on 1/2/13. As a percentage of HPQ's recent stock price of $13.95, this dividend works out to approximately 0.95%, so look for shares of Hewlett-Packard Co to trade 0.95% lower all else being equal when HPQ shares open for trading on 12/10/12.