Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 12

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 12
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 B, CCC, CC, C and D are below investment grade ratings. Holdings designated N/R are not rated by these national rating agencies. 12

Performance*

|                           |     |               |     | Total Returns as ofOctober 31, 2024 |        |     |        |     |         |
|:--------------------------|:----|:--------------|:----|:------------------------------------|:-------|:----|:-------|:----|:--------|
|                           |     |               |     | Average Annual                      |        |     |        |     |         |
|                           |     | InceptionDate |     |                                     | 1-Year |     | 5-Year |     | 10-Year |
| NVG at Common Share NAV   |     | 3/25/02       |     |                                     | 22.15% |     | 0.38%  |     | 3.44%   |
| NVG at Common Share Price |     | 3/25/02       |     |                                     | 35.73% |     | 0.35%  |     | 4.68%   |
| S&P Municipal Bond Index  |     | –             |     |                                     | 10.08% |     | 1.22%  |     | 2.38%   |
| NVG Blended Benchmark     |     | –             |     |                                     | 12.63% |     | 1.84%  |     | 3.09%   |

* For purposes of Fund performance, relative results are measured against the NVG Blended Benchmark. The Fund’s Blended Benchmark consists of: 1) 60% S&P Municipal Bond Investment Grade Index and 2) 40% S&P Municipal Bond High Yield Index. The Fund’s performance was measured against the S&P Municipal Bond Index through April 10, 2016. Daily Common Share NAV and Share Price

| Common 
 Share  
 NAV    |     |      Common 
 Share Price |     | Premium/(Discount) 
 to NAV             |     | Average            
 Premium/(Discount) 
 to NAV             |
| $13.62 |     |      $12.79 |     | (6.09)%            |     | (11.28)%           |

Growth of an Assumed $10,000 Investment as of October 31, 2024 - Common Share Price 13 (continued) Le