On 10/30/13, CommonWealth REIT's 6 1/2% Series D Cumulative Convertible Preferred Shares (CWH.PRD) will trade ex-dividend, for its quarterly dividend of $0.4063, payable on 11/15/13. As a percentage of CWH.PRD's recent share price of $21.88, this dividend works out to approximately 1.86%, so look for shares of CWH.PRD to trade 1.86% lower — all else being equal — when CWH.PRD shares open for trading on 10/30/13. On an annualized basis, the current yield is approximately 7.40%, which compares to an average yield of 7.53% in the "Real Estate" preferred stock category, according to Preferred Stock Channel.As of last close, CWH.PRD was trading at a 12.08% discount to its liquidation preference amount. It should be noted that the preferred shares are convertible, with a conversion ratio of 1.9231.The chart below shows the one year performance of CWH.PRD shares, versus CWH: Below is a dividend history chart for CWH.PRD, showing historical dividends prior to the most recent $0.4063 on CommonWealth REIT's 6 1/2% Series D Cumulative Convertible Preferred Shares: According to the ETF Finder at ETF Channel, CommonWealth REIT ( CWH) makes up 2.94% of the iShares Industrial/Office Real Estate Capped ETF (FNIO) which is trading relatively unchanged on the day Monday. In Monday trading, CommonWealth REIT's 6 1/2% Series D Cumulative Convertible Preferred Shares ( CWH.PRD) is currently down about 0.5% on the day, while the common shares ( CWH) are down about 0.4%.