# Filing Detail

Form N-CSRS - Certified Shareholder Report, Semi-Annual:
SEC Accession No. 0001999371-25-010348
Filing Date
2025-07-31
Accepted
2025-07-31 13:00:02
Documents
19
Period of Report
2025-05-31
Effectiveness Date
2025-07-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT | pfo-ncsrs_053125.htm iXBRL | N-CSRS | 1792458
2 | SECTION 302 CERTIFICAITON | ex99cert.htm | EX-99.CERT | 36011
3 | SECTION 906 CERTIFICAITON | ex99906cert.htm | EX-99.906 CERT | 12685
8 | GRAPHIC | pfo-ncsrs_053125img004.gif | GRAPHIC | 8087
9 | GRAPHIC | pfo-ncsrs_053125img001.gif | GRAPHIC | 32489
10 | GRAPHIC | pfo-ncsrs_053125img002.gif | GRAPHIC | 45990
11 | GRAPHIC | pfo-ncsrs_053125img003.gif | GRAPHIC | 34106
| Complete submission text file | 0001999371-25-010348.txt |  | 2997135

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
4 | XBRL SCHEMA FILE | pfo-20250531.xsd | EX-101.SCH | 7796
5 | XBRL PRESENTATION FILE | pfo-20250531_pre.xml | EX-101.PRE | 10405
6 | XBRL DEFINITION FILE | pfo-20250531_def.xml | EX-101.DEF | 11017
7 | XBRL LABEL FILE | pfo-20250531_lab.xml | EX-101.LAB | 22691
21 | EXTRACTED XBRL INSTANCE DOCUMENT | pfo-ncsrs_053125_htm.xml | XML | 175259

Mailing Address 301 COLORADO BLVD STE 800 C/O FLAHERTY & CRUMRINE INC PASADENA CA 91101
Business Address 301 E COLORADO BLVD STE 720 C/O FLAHERTY & CRUMRINE INC PASADENA CA 91101 (626) 795-7300
Flaherty & Crumrine PREFERRED & INCOME OPPORTUNITY FUND INC (Filer) CIK: 0000882071 (see all company filings)

EIN.: 954355600 | State of Incorp.: MD | Fiscal Year End: 1130
Type: N-CSRS | Act: 40 | File No.: 811-06495 | Film No.: 251170660