Company: NMZ
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-156000
Chunk: 19

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 19
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 on the floating rate certificates issued by the special purpose trusts for the self-deposited inverse floaters held by the Fund 
 (as described in Notes to Financial Statements), where applicable, as follows:                                                                                                                                                                          |

|            |     |     | Ratios of Interest Expense to 
 Average Net Assets Applicable 
              to Common Shares |     |     |          |
|            |     | NVG |                               |     | NZF |          |
| 4/30/25(d) |     |     |                      2.63%(e) |     |     | 2.63%(e) |
| 10/31/24   |     |     |                          2.89 |     |     |     2.82 |
| 10/31/23   |     |     |                          2.78 |     |     |     2.79 |
| 10/31/22   |     |     |                          1.10 |     |     |     1.14 |
| 10/31/21   |     |     |                          0.52 |     |     |     0.62 |
| 10/31/20   |     |     |                          0.97 |     |     |     1.01 |

| (d) | Unaudited. |

| (e) | Annualized. |

| (f) | Value rounded to zero. |

See Notes to Financial Statements 183

Financial Highlights (continuted) The following data is for a common share outstanding for each fiscal year end unless otherwise noted:

|            |     |                  |        |     | Investment Operations   |       |     |                      |         |     |       |         |     |      |         |     | Less Distributions to 
 Common Shareholders   |     |                |    |     |           |       |     |       |         |     | Common Share   |      |     |                |      |     |               |        |     |                |        |
|            |     | Common           
 Share Net Asset  
 Value, Beginning 
 of Period        |        |     | Net                     
 Investment Income (NII) 
 (Loss)(a)               |       |     | Net                  
 Realized/ Unrealized 
 Gain (Loss)          |         |     | Total |         |     | From 
 NII  |         |     |                       |     | From Net       
 Realized Gains