# EDGAR Filing Document

**Accession Number:** 0001266585
**File Stem:** 0000070858-25-000483
**Filing Date:** 2025-12
**Character Count:** 13289
**Document Hash:** 3e1e10a2476bb7973ab7b439f87b6bad
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000070858-25-000483.hdr.sgml**: 20251215

**ACCESSION NUMBER**: 0000070858-25-000483

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 8

**FILED AS OF DATE**: 20251215

**DATE AS OF CHANGE**: 20251215

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
- **CENTRAL INDEX KEY:** 0001266585

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-84378
- **FILM NUMBER:** 251572221

**BUSINESS ADDRESS:**
- **STREET 1:** 333 W WACKER DRIVE
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312 917 8146

**MAIL ADDRESS:**
- **STREET 1:** 333 WEST WACKER DRIVE
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BANK OF AMERICA CORP /DE/
- **CENTRAL INDEX KEY:** 0000070858
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 560906609
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** BANK OF AMERICA CORPORATE CENTER
- **STREET 2:** 100 N TRYON ST
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28255
- **BUSINESS PHONE:** 7043868486

**MAIL ADDRESS:**
- **STREET 1:** BANK OF AMERICA CORPORATE CENTER
- **STREET 2:** 100 N TRYON ST
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28255

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANKAMERICA CORP/DE/
- **DATE OF NAME CHANGE:** 19981022

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NATIONSBANK CORP
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NCNB CORP
- **DATE OF NAME CHANGE:** 19920107

## Exhibit 99.1

```

JOINT FILING AGREEMENT

Pursuant to and in accordance with the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), and the rules and regulations thereunder,
each party hereto hereby agrees to the joint filing, on behalf of each of
them, of any filing required by such party under Section 13 or Section 16
of the Exchange Act or any rule or regulation thereunder (including any
amendment, restatement, supplement, and/or exhibit thereto) with the
Securities and Exchange Commission (and, if such security is registered on
a national securities exchange, also with the exchange), and further
agrees to the filing, furnishing, and/or incorporation by reference of
this agreement as an exhibit thereto. This agreement shall remain in full
force and effect until revoked by any party hereto in a signed writing
provided to each other party hereto, and then only with respect to such
revoking party.

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused
this agreement to be executed and effective as of December 15, 2025.

BANK OF AMERICA CORPORATION
By: /s/ Andres Ortiz
Name: Andres Ortiz
Title: Authorized Signatory

BANC OF AMERICA PREFERRED FUNDING CORP
By: /s/ Andres Ortiz
Name: Andres Ortiz
Title: Authorized Signatory

```

### Attached PDF Documents

**Attachment 1:** `bacpoa.pdf`

_No text found in this document._

**Attachment 2:** `bapfcpoa.pdf`

_No text found in this document._

**Attachment 3:** `Schedule_I.pdf`

_No text found in this document._

**Attachment 4:** `Schedule_II.pdf`

_No text found in this document._

**Attachment 5:** `Trust_Agreement.pdf`

_No text found in this document._

**Attachment 6:** `Custody_Agreement.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 8)**

**NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND**

*(Name of Issuer)*

**ADJUSTABLE RATE MUNIFUND TERM PREFERRED SHARES**

*(Title of Class of Securities)*

**670682111**

*(CUSIP Number)*

**BANK OF AMERICA CORPORATION**<br>BANK OF AMERICA CORPORATE CENTER<br>100 N. TRYON STREET<br>Charlotte NC 28255<br>980-388-3188

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/11/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **670682111** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**BANK OF AMERICA CORP /DE/** | Name of reporting person<br>**BANK OF AMERICA CORP /DE/** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1870.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**1870.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1870.00** | Aggregate amount beneficially owned by each reporting person<br>**1870.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**52.4%** | Percent of class represented by amount in Row (11)<br>**52.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

| **CUSIP No.** | **670682111** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Banc of America Preferred Funding Corp** | Name of reporting person<br>**Banc of America Preferred Funding Corp** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1870.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**1870.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1870.00** | Aggregate amount beneficially owned by each reporting person<br>**1870.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**52.4%** | Percent of class represented by amount in Row (11)<br>**52.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
ADJUSTABLE RATE MUNIFUND TERM PREFERRED SHARES

**(b) Name of Issuer:**
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

**(c) Address of Issuer's Principal Executive Offices:**
333 W WACKER DRIVE, CHICAGO, IL, 60606

This Amendment No. 8 (this "Amendment") amends, as set forth below, the statement on Schedule 13D, dated December 21, 2012 and filed with the SEC on December 28, 2012, (as amended to the date hereof, the "Original Schedule 13D"), for Bank of America Corporation ("BAC") and Banc of America Preferred Funding Corporation ("BAPFC") (collectively, the "Reporting Persons") with respect to the Adjustable Rate Muni Fund Term Preferred Shares ("AMTP Shares") of Nuveen Municipal High Income Opportunity Fund (the "Issuer").

This amendment is being filed in relation to the transfer by BAPFC of 1,000 AMTP series 2032 shares (CUSIP No. 670682111) into a tender option trust arrangement designated as the TOB Series 2025-BAP0001 Trust (the "TOB Trust") on December 11,  2025. The TOB Trust has title to such 1,000 AMTP Shares but does not independently have the power to dispose or direct the disposition of the AMTP Shares. BAPFC, as a beneficiary of the Trust and through its contractual rights, retains an indirect beneficial ownership in the AMTP Shares, including with respect to the voting rights on the AMTP Shares, which additionally remain subject to the Voting Trust. The 870 AMTP series 2028 shares (CUSIP No. 670682889) held by BAPFC and referenced in the responses of the Reporting Persons to Rows (7) through (11) of the cover pages were not transferred into the TOB Trust and remain directly held by BAPFC.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The responses of the Reporting Persons to Rows (7) through (11) of the cover pages of this Statement are incorporated herein by reference.

**(b)**
The responses of the Reporting Persons to Rows (7) through (11) of the cover pages of this Statement are incorporated herein by reference.

**(c)**
On December 11, 2025, Banc of America Preferred Funding Corporation ("BAPFC") deposited 1,000 AMTP series 2032 shares (CUSIP No. 670682111) into a tender option trust arrangement designated as the TOB Series 2025-BAP0001 Trust (the "TOB Trust") on December 11,  2025. The TOB Trust has title to such 1,000 AMTP Shares but does not independently have the power to dispose or direct the disposition of the AMTP Shares. PFC, as a beneficiary of the Trust and through its contractual rights, retains an indirect beneficial ownership in the RVMTP Shares, including with respect to the voting rights on the AMTP Shares, which additionally remain subject to the Voting Trust. The 870 AMTP series 2028 shares (CUSIP No. 670682889) held by BAPFC and referenced in the responses of the Reporting Persons to Rows (7) through (11) of the cover pages were not transferred into the TOB Trust and remain directly held by BAPFC.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 of the Original Schedule 13D is hereby amended by adding the following language after the last paragraph thereof:

On December 11, 2025, Banc of America Preferred Funding Corporation ("BAPFC") deposited 1,000 AMTP Shares into a tender option trust arrangement designated as the TOB Series 2025-BAP0001 Trust (the "TOB Trust") pursuant to the TOB Trust Agreement, dated December 11, 2025, among FMSBonds, Inc, as Trustor, Wilmington Trust, National Association, as Delaware Trustee, Wilmington Trust, National Association, as Trustee Wilmington Trust, National Association, as Tender Agent, Bank of America, National Association, solely in its capacity as the Tender Option Provider and BAPFC. The TOB Trust has title to such 1,000 AMTP Shares but does not independently have the power to dispose or direct the disposition of the AMTP Shares. PFC, as a beneficiary of the Trust and through its contractual rights, retains an indirect beneficial ownership in the AMTP Shares, including with respect to the voting rights on the AMTP Shares, which additionally remain subject to the Voting Trust.  Such tender option bond arrangement additionally is related to that certain Custody Agreement by and among Wilmington Trust, National Association, as custodian FMSBonds, Inc., as depositor and BAPFC, dated December 11, 2025.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** BANK OF AMERICA CORP /DE/

**Signature:** Andres Ortiz

**Name/Title:** Authorized Signatory

**Date:** 12/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Banc of America Preferred Funding Corp

**Signature:** Andres Ortiz

**Name/Title:** Authorized Signatory

**Date:** 12/15/2025