Company: NMZ
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-156000
Chunk: 18

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 18
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0.71 |     |                      |   -4.72 |     |       |   -4.01 |     |      | (0.73  | ) |     |                       |     |                |     — |     |           |     — |     |       | (0.73  | ) |     |                         | —    |     |               |  12.24 |     |          10.83 |
| 10/31/21   |     |                  |  15.96 |     |                         |  0.78 |     |                      |    1.03 |     |       |    1.81 |     |      | (0.79  | ) |     |                       |     |                |     — |     |           |     — |     |       | (0.79  | ) |     |                         | —    |     |               |  16.98 |     |          16.73 |
| 10/31/20   |     |                  |  16.63 |     |                         |  0.80 |     |                      |   -0.71 |     |       |    0.09 |     |      | (0.76  | ) |     |                       |     |                |     — |     |           |     — |     |       | (0.76  | ) |     |                         | —    |     |               |  15.96 |     |          14.74 |

| (a) | Based on average shares outstanding. |

| (b) | Total Return Based on Common Share NAV is the combination of changes in common share NAV, reinvested dividend income                                                                                                                                  
 at Common Share NAV and reinvested capital gains distributions at NAV, if any. The last dividend declared in the period, which is typically paid on the first business day of the following month, is assumed to be reinvested at the ending NAV. The 
 actual reinvest price for the last dividend declared in the period may often be based on the Fund’s market price (and not its NAV), and therefore may be different from the price used in the calculation. Total returns are not annualized.          |

| Total Return Based on Common Share Price is the combination of changes in the market price per share and the effect                                                                                                                                       
 of reinvested dividend income and reinvested capital gains distributions, if any, at the average