<SEC-DOCUMENT>0001387131-22-001287-index.html : 20220204
<SEC-HEADER>0001387131-22-001287.hdr.sgml : 20220204
<ACCEPTANCE-DATETIME>20220204114030
ACCESSION NUMBER:		0001387131-22-001287
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		33
CONFORMED PERIOD OF REPORT:	20211130
FILED AS OF DATE:		20220204
DATE AS OF CHANGE:		20220204
EFFECTIVENESS DATE:		20220204

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:		22592000

	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-CSR
<SEQUENCE>1
<FILENAME>pfo-ncsr_113021.htm
<DESCRIPTION>CERTIFIED ANNUAL SHAREHOLDER REPORT
<TEXT>
Document 1 - file: pfo-ncsr_113021.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.COE
<SEQUENCE>2
<FILENAME>ex99-coe.htm
<DESCRIPTION>CODE OF ETHICS
<TEXT>
Document 2 - file: ex99-coe.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>3
<FILENAME>ex99-cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATIONS
<TEXT>
Document 3 - file: ex99-cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>4
<FILENAME>ex99-906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATIONS
<TEXT>
Document 4 - file: ex99-906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(C)
<SEQUENCE>5
<FILENAME>ex99-c.htm
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 5 - file: ex99-c.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>pfo-ncsr_113021img001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: pfo-ncsr_113021img001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>pfo-ncsr_113021img002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: pfo-ncsr_113021img002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>pfo-ncsr_113021img003.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: pfo-ncsr_113021img003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>pfo-ncsr_113021img004.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: pfo-ncsr_113021img004.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>pfo-ncsr_113021img005.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: pfo-ncsr_113021img005.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>coe-001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: coe-001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>coe-002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: coe-002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>coe-004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: coe-004.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>coe-006.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: coe-006.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>coe-008.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: coe-008.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>coe-010.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: coe-010.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>coe-012.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: coe-012.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>coe-014.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 18 - file: coe-014.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>coe-016.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 19 - file: coe-016.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>coe-018.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 20 - file: coe-018.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>coe-020.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 21 - file: coe-020.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>coe-022.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 22 - file: coe-022.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>coe-024.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 23 - file: coe-024.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>coe-025.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 24 - file: coe-025.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>coe-027.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 25 - file: coe-027.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>coe-029.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 26 - file: coe-029.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>coe-031.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 27 - file: coe-031.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>28
<FILENAME>coe-033.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 28 - file: coe-033.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>29
<FILENAME>coe-036.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 29 - file: coe-036.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>30
<FILENAME>coe-037.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 30 - file: coe-037.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>31
<FILENAME>coe-038.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 31 - file: coe-038.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>32
<FILENAME>ex99c-001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 32 - file: ex99c-001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>33
<FILENAME>ex99c-002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 33 - file: ex99c-002.gif

</DOCUMENT>
</SEC-DOCUMENT>