<SEC-DOCUMENT>0001387131-19-000577-index.html : 20190129 <SEC-HEADER>0001387131-19-000577.hdr.sgml : 20190129 <ACCEPTANCE-DATETIME>20190129164215 ACCESSION NUMBER: 0001387131-19-000577 CONFORMED SUBMISSION TYPE: N-CSR PUBLIC DOCUMENT COUNT: 10 CONFORMED PERIOD OF REPORT: 20181130 FILED AS OF DATE: 20190129 DATE AS OF CHANGE: 20190129 EFFECTIVENESS DATE: 20190129 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-CSR SEC ACT: 1940 Act SEC FILE NUMBER: 811-06495 FILM NUMBER: 19549186 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-CSR <SEQUENCE>1 <FILENAME>pfo-ncsr_113018.htm <DESCRIPTION>CERTIFIED ANNUAL SHAREHOLDER REPORT <TEXT> Document 1 - file: pfo-ncsr_113018.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CODE ETH <SEQUENCE>2 <FILENAME>ex99-codeeth.htm <DESCRIPTION>CODE OF ETHICS <TEXT> Document 2 - file: ex99-codeeth.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CERT <SEQUENCE>3 <FILENAME>ex99-cert.htm <DESCRIPTION>CERTIFICATIONS <TEXT> Document 3 - file: ex99-cert.htm
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</DOCUMENT> </SEC-DOCUMENT>