<SEC-DOCUMENT>0001752724-21-020710-index.html : 20210211 <SEC-HEADER>0001752724-21-020710.hdr.sgml : 20210211 <ACCEPTANCE-DATETIME>20210211151449 ACCESSION NUMBER: 0001752724-21-020710 CONFORMED SUBMISSION TYPE: N-CEN PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20201130 FILED AS OF DATE: 20210211 DATE AS OF CHANGE: 20210211 EFFECTIVENESS DATE: 20210211 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-CEN SEC ACT: 1940 Act SEC FILE NUMBER: 811-06495 FILM NUMBER: 21619147 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 800 STREET 2: C/O FLAHERTY & CRUMRINE INC CITY: PASADENA STATE: CA ZIP: 91101 FORMER COMPANY: FORMER CONFORMED NAME: Flaherty & Crumrine PREFERRED INCOME OPPORTUNITY FUND INC DATE OF NAME CHANGE: 20050708 FORMER COMPANY: FORMER CONFORMED NAME: PREFERRED INCOME OPPORTUNITY FUND INC DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>N-CEN <SEQUENCE>1 <FILENAME>primary_doc.xml <TEXT> Document 1 - file: primary_doc.html
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</DOCUMENT> <DOCUMENT> <TYPE>INTERNAL CONTROL RPT <SEQUENCE>2 <FILENAME>g.1.a.iii_pfo.htm <TEXT> Document 2 - file: g.1.a.iii_pfo.htm
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