Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 24

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 24
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    126,122,398 |
|   |           |     |    |     | NET ASSETS APPLICABLE TO COMMON SHARES - 100%                                 |     |         |     |             |     | $ |  2,908,382,719 |

| All percentages shown in the Portfolio of Investments are based on net assets applicable to common shares unless otherwise noted. |

| (a) | Security is exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities are deemed liquid and may be resold in transactions exempt from registration, which are normally those transactions with qualified institutional buyers. As of the end of the reporting period, the aggregate value of these securities is $568,922,480 or 12.0% of Total Investments. |

| (b) | Defaulted security. A security whose issuer has failed to fully pay principal and/or interest when due, or is under the protection of bankruptcy. |

| (c) | When-issued or delayed delivery security. |

| (d) | Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, which ensure the timely payment of principal and interest. |

| (e) | Investment, or portion of investment, has been pledged to collateralize the net payment obligations for investments in inverse floating rate transactions. |

| (f) | For fair value measurement disclosure purposes, investment classified as Level 3. |

| (g) | Step-upcoupon bond, a bond with a coupon that increases (“steps up”), usually at regular intervals, while the bond is outstanding. The rate shown is the coupon as of the end of the reporting period. |

| (h) | Inverse floating rate trust is a non recourse trust. |

| (i) | Senior loans generally pay interest at rates which are periodically adjusted by reference to a base short-term, floating lending rate (Reference Rate) plus an assigned fixed rate (Spread). These floating lending rates are generally (i) the lending rate referenced by the Secured Overnight Financing Rate (“SOFR”), or (ii) the prime rate offered by one or more major United States banks. Senior loans may be considered restricted in that the Fund ordinarily is contractually obligated to receive approval from the agent bank and/or borrower prior to the disposition of a senior loan. The rate shown is the coupon as of the end of the reporting period. |

| (j) | Senior loans generally are subject to mandatory and/or optional