On 12/17/12, Gladstone Commercial Corp's 7.50% Series B Cumulative Redeemable Preferred Stock (GOODO) will trade ex-dividend, for its monthly dividend of $0.1562, payable on 12/31/12. As a percentage of GOODO's recent share price of $25.22, this dividend works out to approximately 0.62%, so look for shares of GOODO to trade 0.62% lower all else being equal when GOODO shares open for trading on 12/17/12.