Company: NMZ
Filing Date: 2025-04-28
Form Type: N-23C-2
Source: 0001999371-25-004885
Chunk: 0

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-04-28
Form: N-23C-2
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

Rule 23c-2 Notice of Intention to

Redeem Securities

of

Nuveen Municipal High Income Opportunity Fund

333 West Wacker Drive

Chicago, Illinois 60606

under the

Investment Company Act of 1940

Investment Company Act File No. 811-21449</div>

The undersigned registered closed-end investment company hereby notifies the Securities and Exchange Commission that it may redeem securities of which it is the issuer, as set forth below in accordance with the requirements of Rule 23c-2 under the Investment Company Act of 1940 (the “Act”).

| (1) | Title                                                                                    
 of the class of securities of Nuveen Municipal High Income Opportunity Fund (the “Fund”) 
 to be redeemed:                                                                          |

Preferred shares of the series indicated below (“Preferred Shares”):

Adjustable Rate MuniFund Term Preferred Shares (“AMTP Shares”), Liquidation Preference $100,000 per share, of the following series:

Series 2028 (CUSIP #670682 889)

Series 2031 (CUSIP #670682 871)

Series 2032 (CUSIP #670682 111)

| (2) | Date                                                           
 on which the securities are expected to be called or redeemed: |

The Fund may redeem Preferred Shares on one or more different dates during the period set forth above, or on a subsequent date, and the redemption of any series in full may be effected on an earlier date, in each case, due to market conditions or otherwise as determined by the Board of Trustees of the Fund.

| (3) | Applicable                                                                                  
 provisions of the governing instrument pursuant to which the securities are to be redeemed: |

The AMTP Shares selected for redemption are to be redeemed pursuant to Section 2.5(c) of the Statement Establishing and Fixing the Rights and Preferences of Adjustable Rate MuniFund Term Preferred Shares.

| (4) | The                                                                                       
 number of shares to be redeemed and the basis upon which the shares to be redeemed are to 
 be selected:                                                                              |

The Fund may redeem up to 2,380 of its currently outstanding Preferred Shares from one or more of Series 2028 AMTP Shares, Series 2031 AMTP Shares and/or Series 2032 AMTP Shares, as determined by the Fund. Within a series selected by the Fund for redemption in part, Preferred