<SEC-DOCUMENT>0001387131-21-001837-index.html : 20210525
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ACCESSION NUMBER:		0001387131-21-001837

CONFORMED SUBMISSION TYPE:	N-2

PUBLIC DOCUMENT COUNT:		15

FILED AS OF DATE:		20210205

DATE AS OF CHANGE:		20210419


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-2

		SEC ACT:		1940 Act

		SEC FILE NUMBER:	811-06495

		FILM NUMBER:		21596861



	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




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-2

		SEC ACT:		1933 Act

		SEC FILE NUMBER:	333-252798

		FILM NUMBER:		21596862



	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



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<DOCUMENT>
<TYPE>N-2
<SEQUENCE>1
<FILENAME>pfo-n2_020521.htm
<DESCRIPTION>INITIAL FILING OF A REGISTRATION STATEMENT
<TEXT>
Document 1 - file: pfo-n2_020521.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(A)(2)
<SEQUENCE>3
<FILENAME>ex99-a2.htm
<DESCRIPTION>ARTICLES OF AMENDMENT DATED JUNE 17, 1998
<TEXT>
Document 3 - file: ex99-a2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(A)(3)
<SEQUENCE>4
<FILENAME>ex99-a3.htm
<DESCRIPTION>ARTICLES OF AMENDMENT DATED MAY 27, 1999
<TEXT>
Document 4 - file: ex99-a3.htm

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<DOCUMENT>
<TYPE>EX-99.(A)(6)
<SEQUENCE>5
<FILENAME>ex99-a6.htm
<DESCRIPTION>ARTICLES OF AMENDMENT DATED JULY 5, 2019
<TEXT>
Document 5 - file: ex99-a6.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(B)(2)
<SEQUENCE>6
<FILENAME>ex99-b2.htm
<DESCRIPTION>AMENDMENT TO THE AMENDED AND RESTATED BYLAWS
<TEXT>
Document 6 - file: ex99-b2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(E)
<SEQUENCE>7
<FILENAME>ex99-e.htm
<DESCRIPTION>DIVIDEND REINVESTMENT AND CASH PURCHASE PLAN
<TEXT>
Document 7 - file: ex99-e.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(R)(1)
<SEQUENCE>8
<FILENAME>ex99-r1.htm
<DESCRIPTION>CODE OF ETHICS OF THE FUND
<TEXT>
Document 8 - file: ex99-r1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(R)(2)
<SEQUENCE>9
<FILENAME>ex99-r2.htm
<DESCRIPTION>CODE OF ETHICS OF THE ADVISER
<TEXT>
Document 9 - file: ex99-r2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(S)
<SEQUENCE>10
<FILENAME>ex99-s.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
Document 10 - file: ex99-s.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>pfon2004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: pfon2004.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>pfon2001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: pfon2001.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>pfon2002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: pfon2002.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>pfon2003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: pfon2003.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>pfo001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: pfo001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>COVER
<SEQUENCE>16
<FILENAME>filename16.htm
<TEXT>
Document 16 - file: filename16.htm

</DOCUMENT>
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