Flaherty & Crumrine Preferred Income Opportunity Fund Inc. declared dividend of $0.0635 per share for May, June and July, 2020. May dividend payment date is May 29, 2020, record date is May 22, 2020 and ex-dividend date is May 21, 2020. June dividend payment date is June 30, 2020, record date is June 23, 2020 and ex-dividend date is June 22, 2020. July dividend payment date is July 31, 2020, record date is July 24, 2020 and ex-dividend date is July 23, 2020.