On 3/27/14, Corporate Office Properties Trust's 7 1/2% Series H Cumulative Redeemable Preferred Shares ( OFC.PRH) will trade ex-dividend, for its quarterly dividend of $0.4688, payable on 4/15/14. As a percentage of OFC.PRH's recent share price of $25.30, this dividend works out to approximately 1.85%, so look for shares of OFC.PRH to trade 1.85% lower — all else being equal — when OFC.PRH shares open for trading on 3/27/14. On an annualized basis, the current yield is approximately 7.38%, which compares to an average yield of 7.31% in the "Real Estate" preferred stock category, according to Preferred Stock Channel.As of last close, OFC.PRH was trading at a 1.76% premium to its liquidation preference amount. The chart below shows the one year performance of OFC.PRH shares, versus OFC: Below is a dividend history chart for OFC.PRH, showing historical dividends prior to the most recent $0.4688 on Corporate Office Properties Trust's 7 1/2% Series H Cumulative Redeemable Preferred Shares: According to the ETF Finder at ETF Channel, Corporate Office Properties Trust ( OFC) makes up 2.64% of the PowerShares KBW Premium Yield Equity REIT Portfolio ETF (KBWY) which is trading relatively unchanged on the day Tuesday. In Tuesday trading, Corporate Office Properties Trust's 7 1/2% Series H Cumulative Redeemable Preferred Shares ( OFC.PRH) is currently down about 0.6% on the day, while the common shares ( OFC) are trading flat.