EX-99.906 CERT 3 ex99906cert.htm SECTION 906 CERTIFICAITON

Flaherty & Crumrine Preferred and Income Opportunity Fund Incorporated

Exhibit 99.906 CERT

Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the Sarbanes-Oxley Act

I, R. Eric Chadwick, Chief Executive Officer and President of Flaherty & Crumrine Preferred and Income Opportunity Fund Incorporated (the “Registrant”), certify that:

| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: | July 24, 2025 |  | /s/ R. Eric Chadwick |
|  |  | R. Eric Chadwick, Chief Executive Officer and President
|  |  | (Principal Executive Officer) |

I, Bradford S. Stone, Chief Financial Officer, Treasurer and Vice President of Flaherty & Crumrine Preferred and Income Opportunity Fund Incorporated (the “Registrant”), certify that:

| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: | July 24, 2025 |  | /s/ Bradford S. Stone |
|  |  | Bradford S. Stone, Chief Financial Officer, Treasurer and Vice President
|  |  | (Principal Financial Officer) |