Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 25

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 25
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 prepayment. Because of these mandatory prepayment conditions and because there may be significant economic incentives for a borrower to prepay, prepayments of senior loans may occur. As a result, the actual remaining maturity of senior loans held may be substantially less than the stated maturities shown. |

| (k) | MFP Shares, Net as a percentage of Total Investments is 10.9%. |

| (l) | VRDP Shares, Net as a percentage of Total Investments is 26.0%. |

| ETM | Escrowed to maturity |

| IF | Inverse floating rate security issued by a tender option bond (“TOB”) trust, the interest rate on which varies inversely with the Securities Industry Financial Markets Association (SIFMA) short-term rate, which resets weekly, or a similar short-term rate, and is reduced by the expenses related to the TOB trust. |

| UB | Underlying bond of an inverse floating rate trust reflected as a financing transaction. Inverse floating rate trust is a Recourse Trust unless otherwise noted. |

See Notes to Financial Statements 66 Portfolio of Investments October 31, 2024 NZF

|   |  PRINCIPAL |     |        |     | DESCRIPTION                                                                                                                                         
 LONG-TERM INVESTMENTS - 159.3% (100.0% of Total Investments)                                                                                        
 MUNICIPAL BONDS - 159.3% (100.0% of Total Investments)                                                                                              
 ALABAMA - 1.3% (0.8% of Total Investments)                                                                                                          |     |   RATE |     | MATURITY |     |   |      VALUE |
|:--|-----------:|:----|:-------|:----|:----------------------------------------------------------------------------------------------------------------------------------------------------|:----|-------:|:----|:---------|:----|:--|-----------:|
| $ | 15,310,000 |     | -a     |     | Alabama Corrections Institution Finance Authority, Revenue Bonds, Series 2022A, (UB)                                                                |     | 5.250% |     | 07/01/52 |     | $ | 16,249,093 |
|   |  8,585,000 |     | -b     |     | Alabama Private Colleges and University Facilities Authority, Limited Obligation Bonds, University of Mobile Project, Series 2015A                  |     |  6.000 |     | 09/01/45 |     |