UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549SCHEDULE 13D
Under the Securities Exchange Act of 1934Nuveen Municipal High Income Opportunity Fund (NMZ)
(Name of Issuer)Municipal Auction Rate Cumulative Preferred Shares
(Title of Class of Securities)670682202
670682301
670682400
(CUSIP Number)George W. Karpus, President
Karpus Management, Inc.,
d/b/a Karpus Investment Management
183 Sully's Trail
Pittsford, New York 14534
(585) 586-4680
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)August 4, 2010
(Date of Event which Requires Filing of this Statement)If the filing person has previously filed a statement on Schedule 13G
to report the acquisition that is the subject of this Schedule 13D,
and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or
240.13d-1(g), check the following box.
CUSIP No.: 670682202; 670682301; 670682400
1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only).Karpus Management, Inc., d/b/a Karpus Investment Management
I.D. #16-1290558
2. Check the Appropriate Box if a Member of a Group (See Instructions)(a)
(b) X
3. SEC Use Only
4. Source of Funds (See Instructions)AF
5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)N/A
6. Citizenship or Place of OrganizationNew York
Number of Shares Beneficially Owned by Each reporting Person With:7. Sole Voting Power868. Shared Voting PowerN/A9. Sole Dispositive Power8610. Shared Dispositive PowerN/A
11. Aggregate Amount Beneficially Owned by Each Reporting Person86
12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)N/A
13. Percent of Class Represented by Amount in Row (11)2.26%*
14. Type of Reporting Person (See Instructions)IA
*Item 13, above, is calculated based on the aggregate amount of 3,800 outstanding Municipal Auction Rate Cumulative Preferred Shares indicated by the Issuer's form N-CSR filed with the U.S. Securities and Exchange Commission on June 8, 2010 dated as of April 30, 2010.
Item 1. Security and Issuer.
Nuveen Municipal High Income Opportunity Fund
Nuveen Funds
333 West Wacker Drive
Chicago, IL 60606
Item 2. Identity and Background.(a) Karpus Management, Inc., d/b/a Karpus Investment Management (“KIM”), George W. Karpus, President, Director and controlling stockholder, Jo Ann Van Degriff, Partner Emeritus.
(b) The address of KIM’s principal place of business and principal office is: 183 Sully’s Trail, Pittsford, New York 14534.
(c) Principal business and occupation - Investment management for individuals, pension plans, profit sharing plans, corporations, endowments, trusts and others.
(d) None of the Principals, George W. Karpus, Jo Ann Van Degriff (the “Principals”) or KIM has been convicted in the past 5 years of any criminal proceeding (excluding traffic violations).
(e) During the last 5 years none of the Principals or KIM has been a party to a civil proceeding as a result of which any of them is subject to a judgment, decree, or final order enjoining future violations of or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
(f) Each of the Principals is a United States citizen. KIM is a New York corporation.
Item 3. Source and Amount of Funds or Other Considerations.KIM, an independent investment advisor, has accumulated 86 shares of NMZ Municipal Auction Rate Cumulative Preferred Shares on behalf of accounts that are managed by KIM (the “Accounts”) under limited powers of attorney, which represents 2.26% of the outstanding shares. All funds that have been utilized in making such purchases are from such Accounts.
Item 4. Purpose of Transaction.KIM has purchased Shares for the Accounts for investment purposes. However, KIM reserves the right to contact management with regard to concerns that they have with respect to the Fund. This may include letters to the Board and/or other communications with Fund management. Being an independent registered investment advisor, with a specialty focus in closed end funds, the profile of the NMZ Municipal Auction Rate Cumulative Preferred Shares fits the investment guidelines for various Accounts. Shares have been acquired since June 29, 2009.
Item 5. Interest in Securities of the Issuer.(a) As of the date of this Report, KIM represents beneficial ownership of 86 shares or 2.26% of the outstanding shares. None of the principals of KIM presently own shares of NMZ Municipal Auction Rate Cumulative Preferred Shares.
(b) KIM has the sole power to dispose of and to vote all of such Shares under limited powers of attorney.
(c) There have been no open market purchases for the last 60 days for the Accounts. There have been no dispositions and no acquisitions.The Accounts have the right to receive all dividends from, and any proceeds from the sale of the Shares. None of the Accounts has an interest in Shares constituting more than 5% of the Shares outstanding.
Item 6. Contracts, Arrangements, Understandings, or Relationships with Respect to Securities of the Issuer.Except as described above, there are no contracts, arrangements, understandings or relationships of any kind among the Principals and KIM and between any of them and any other person with respect to any of the NMZ Municipal Auction Rate Cumulative Preferred Shares.
Item 7. Materials to be Filed as Exhibits.Attached is an open letter drafted and sent to the defendants in Martin Safier, Derivatively on Behalf of Nominal Defendant Nuveen Diversified Dividend and Income Fund, et al. v. Nuveen Asset Management, et al., Docket Number 2010-CH-32166, filed in the Circuit Court of Cook County, County Department, Chancery Division.
SIGNATUREAfter reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete, and correct.
Karpus Management, Inc.
By: /s/
Name: Cody B. Bartlett Jr., CFA
Title: Managing Director of Investments
Date: August 5, 2010
