Looking at the universe of stocks we cover at Dividend Channel, on 6/26/13, Corporate Office Properties Trust ( OFC) will trade ex-dividend, for its quarterly dividend of $0.275, payable on 7/15/13. As a percentage of OFC's recent stock price of $23.96, this dividend works out to approximately 1.15%, so look for shares of Corporate Office Properties Trust to trade 1.15% lower — all else being equal — when OFC shares open for trading on 6/26/13.Below is a dividend history chart for OFC, showing historical dividends prior to the most recent $0.275 declared by Corporate Office Properties Trust: In general, dividends are not always predictable; but looking at the history above can help in judging whether the most recent dividend from OFC is likely to continue, and whether the current estimated yield of 4.59% on annualized basis is a reasonable expectation of annual yield going forward. The chart below shows the one year performance of OFC shares, versus its 200 day moving average: Looking at the chart above, OFC's low point in its 52 week range is $21.36 per share, with $29.95 as the 52 week high point — that compares with a last trade of $23.99. According to the ETF Finder at ETF Channel, OFC makes up 2.34% of the KBW Premium Yield Equity REIT Portfolio ETF ( KBWY) which is trading lower by about 2.3% on the day Monday. In Monday trading, Corporate Office Properties Trust shares are currently down about 3% on the day.