Looking at the universe of stocks we cover at Dividend Channel, on 5/6/15, First Potomac Realty Trust ( FPO) will trade ex-dividend, for its quarterly dividend of $0.15, payable on 5/15/15. As a percentage of FPO's recent stock price of $10.70, this dividend works out to approximately 1.40%, so look for shares of First Potomac Realty Trust to trade 1.40% lower — all else being equal — when FPO shares open for trading on 5/6/15.Below is a dividend history chart for FPO, showing historical dividends prior to the most recent $0.15 declared by First Potomac Realty Trust: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from FPO is likely to continue, and whether the current estimated yield of 5.61% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of FPO shares, versus its 200 day moving average: Looking at the chart above, FPO's low point in its 52 week range is $10.63 per share, with $13.61 as the 52 week high point — that compares with a last trade of $10.70. According to Preferred Stock Channel, there is a series of preferred stock that is senior to FPO, which trades under the symbol FPO.PRA — more info ». In Tuesday trading, First Potomac Realty Trust shares are currently off about 0.1% on the day.