On 9/14/17, Arch Capital Group Ltd's 5.25% Non-Cumulative Preferred Shares, Series E (ACGLP) will trade ex-dividend, for its quarterly dividend of $0.3281, payable on 9/30/17. As a percentage of ACGLP's recent share price of $24.87, this dividend works out to approximately 1.32%, so look for shares of ACGLP to trade 1.32% lower all else being equal when ACGLP shares open for trading on 9/14/17..