On 12/11/13, PS Business Parks, Inc's 6.45% Cumulative Preferred Stock, Series S ( PSB.PRS) will trade ex-dividend, for its quarterly dividend of $0.4031, payable on 12/30/13. As a percentage of PSB.PRS's recent share price of $22.25, this dividend works out to approximately 1.81%, so look for shares of PSB.PRS to trade 1.81% lower — all else being equal — when PSB.PRS shares open for trading on 12/11/13. On an annualized basis, the current yield is approximately 7.22%, which compares to an average yield of 7.74% in the "Real Estate" preferred stock category, according to Preferred Stock Channel.As of last close, PSB.PRS was trading at a 10.72% discount to its liquidation preference amount. The chart below shows the one year performance of PSB.PRS shares, versus PSB: Below is a dividend history chart for PSB.PRS, showing historical dividends prior to the most recent $0.4031 on PS Business Parks, Inc's 6.45% Cumulative Preferred Stock, Series S : According to the ETF Finder at ETF Channel, PS Business Parks, Inc ( PSB) makes up 1.55% of the iShares Industrial/Office Real Estate Capped ETF (FNIO) which is trading higher by about 0.3% on the day Monday. In Monday trading, PS Business Parks, Inc's 6.45% Cumulative Preferred Stock, Series S ( PSB.PRS) is currently off about 0.3% on the day, while the common shares ( PSB) are down about 0.7%.