<SEC-DOCUMENT>0001193125-16-663616-index.html : 20160729 <SEC-HEADER>0001193125-16-663616.hdr.sgml : 20160729 <ACCEPTANCE-DATETIME>20160729101404 ACCESSION NUMBER: 0001193125-16-663616 CONFORMED SUBMISSION TYPE: N-CSRS PUBLIC DOCUMENT COUNT: 7 CONFORMED PERIOD OF REPORT: 20160531 FILED AS OF DATE: 20160729 DATE AS OF CHANGE: 20160729 EFFECTIVENESS DATE: 20160729 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Flaherty & Crumrine PREFERRED INCOME OPPORTUNITY FUND INC CENTRAL INDEX KEY: 0000882071 IRS NUMBER: 954355600 STATE OF INCORPORATION: MD FISCAL YEAR END: 1130 FILING VALUES: FORM TYPE: N-CSRS SEC ACT: 1940 Act SEC FILE NUMBER: 811-06495 FILM NUMBER: 161792381 BUSINESS ADDRESS: STREET 1: 301 E COLORADO BLVD STE 720 STREET 2: C/O FLAHERTY & CRUMRINE INC CITY: PASADENA STATE: CA ZIP: 91101 BUSINESS PHONE: (626) 795-7300 MAIL ADDRESS: STREET 1: 301 COLORADO BLVD STE 720 STREET 2: C/O FLAHERTY & CRUMRINE INC CITY: PASADENA STATE: CA ZIP: 91101 FORMER COMPANY: FORMER CONFORMED NAME: PREFERRED INCOME OPPORTUNITY FUND INC DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>N-CSRS <SEQUENCE>1 <FILENAME>d177579dncsrs.htm <DESCRIPTION>FLAHERTY & CRUMRINE PREFERRED INCOME FLAHERTY & CRUMRINE PREFERRED INCOME <TEXT> Document 1 - file: d177579dncsrs.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CERT <SEQUENCE>2 <FILENAME>d177579dex99cert.htm <DESCRIPTION>302 CERTIFICATIONS <TEXT> Document 2 - file: d177579dex99cert.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.906CERT <SEQUENCE>3 <FILENAME>d177579dex99906cert.htm <DESCRIPTION>906 CERTIFICATION <TEXT> Document 3 - file: d177579dex99906cert.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>g177579g15h91.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: g177579g15h91.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>g177579g67p81.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: g177579g67p81.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>g177579g91s93.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: g177579g91s93.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>g177579pie_01.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: g177579pie_01.jpg
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