Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 60

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 60
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| 10/31/20(d) |     |            |           – |     |          – |     |             |           – |     |         – |     |            |           – |     |        – |

| (a) | Aggregate Amount Outstanding: Aggregate amount outstanding represents the liquidation preference as of the end of the relevant fiscal year. |

| (b) | Asset Coverage Per $1,000: Asset coverage per $1,000 is calculated by subtracting the Fund’s liabilities and indebtedness not represented by senior securities from the Fund’s total assets, dividing the result by the aggregate amount of the Fund’s senior securities representing indebtedness then outstanding (if applicable), plus the aggregate of the involuntary liquidation preference of the outstanding preferred shares, if applicable, and multiplying the result by 1,000. |

| (c) | Asset Coverage Per $100,000: Asset coverage per $100,000 is calculated by subtracting the Fund’s liabilities and indebtedness not represented by senior securities from the Fund’s total assets, dividing the result by the aggregate amount of the Fund’s senior securities representing indebtedness then outstanding (if applicable,) plus the aggregate of the involuntary liquidation preference of the outstanding preferred shares, if applicable, and multiplying the result by 100,000. |

189 Notes to Financial Statements 1. General Information Fund Information: The funds covered in this report and their corresponding New York Stock Exchange (“NYSE”) symbols are as follows (each a “Fund” and collectively, the “Funds”):

| · |     | NuveenAMT-FreeMunicipal Credit Income Fund (NVG) |

| · |     | Nuveen Municipal Credit Income Fund (NZF) |

| · |     | Nuveen Municipal High Income Opportunity Fund (NMZ) |

| · |     | Nuveen Municipal Credit Opportunities Fund (NMCO) |

| · |     | Nuveen Dynamic Municipal Opportunities Fund (NDMO) |

The Funds are registered under the Investment Company Act of 1940 (the “1940 Act”), as amended, as closed-endmanagement investment companies. NVG, NZF, NMZ, NMCO and NDMO were organized as Massachusetts business trusts on July 12, 1999, March 21, 2001, October 8, 2003, April 18, 2019 and November 4, 2019, respectively