On 6/11/15, Aspen Insurance Holdings Ltd's 7.250% Perpetual Non-Cumulative Preference Shares (AHL.PRB) will trade ex-dividend, for its quarterly dividend of $0.4531, payable on 7/1/15. As a percentage of AHL.PRB's recent share price of $26.48, this dividend works out to approximately 1.71%, so look for shares of AHL.PRB to trade 1.71% lower — all else being equal — when AHL.PRB shares open for trading on 6/11/15. On an annualized basis, the current yield is approximately 6.85%, which compares to an average yield of 5.70% in the "Financial" preferred stock category, according to Preferred Stock Channel.As of last close, AHL.PRB was trading at a 5.92% premium to its liquidation preference amount, versus the average premium of 1.63% in the "Financial" category. Investors should keep in mind that the shares are not cumulative, meaning that in the event of a missed payment, the company does not have to pay the balance of missed dividends to preferred shareholders before resuming a common dividend. The chart below shows the one year performance of AHL.PRB shares, versus AHL: Below is a dividend history chart for AHL.PRB, showing historical dividends prior to the most recent $0.4531 on Aspen Insurance Holdings Ltd's 7.250% Perpetual Non-Cumulative Preference Shares : According to the ETF Finder at ETF Channel, Aspen Insurance Holdings Ltd ( AHL) makes up 2.03% of the SPDR S&P Insurance ETF (KIE) which is trading relatively unchanged on the day Tuesday. In Tuesday trading, Aspen Insurance Holdings Ltd's 7.250% Perpetual Non-Cumulative Preference Shares ( AHL.PRB) is currently trading flat on the day, while the common shares ( AHL) are trading flat.