Nuveen Investments, a leading provider of diversified investment services, today announced the Nuveen Municipal High Income Opportunity Fund (AMEX: NMZ) has filed an initial registration statement to establish an equity shelf program. The program is designed to provide the fund's portfolio managers with additional flexibility in pursuing attractive investment opportunities they believe may enhance long-term shareholder returns. Under its equity shelf program, the fund, subject to market conditions, may raise additional equity capital from time to time in varying amounts and offering methods at a net price at or above the fund's net asset value per common share.

Nuveen Investments also announced the addition of John Wilhelm, Vice President of Nuveen Asset Management, as a co-portfolio manager for the fund. Wilhelm joins John Miller in the management of the fund. Miller has overseen the fund since its inception. Prior to joining Nuveen in 1999, Wilhelm was a Senior Credit Analyst in the Van Kampen Senior Loan Group.

The fund's primary investment objective is to provide high current income exempt from regular federal income tax. Its secondary investment objective is to seek attractive total return consistent with its primary objective. More information on this and other Nuveen closed-end funds is posted on Nuveen's web site at www.nuveen.com/cef.

The fund has filed a preliminary prospectus with the Securities and Exchange Commission (?SEC?) relating to the shelf offering of the fund. The information in the preliminary prospectus is not complete and may be changed. New shares of the fund will not be sold until the registration statement is effective. The preliminary prospectus is not an offer to sell newly registered shares and it is not soliciting an offer to buy newly registered shares in any jurisdiction where the offer or sale is not permitted.

Investors should consider the fund's investment objectives, risks, charges and expenses carefully before investing. The fund's preliminary prospectus contains this and other information about the fund. Investors should read the fund's prospectus carefully before investing. Investors may obtain a prospectus by visiting Nuveen's web site at www.nuveen.com/cef or by contacting Nuveen Investments at 1-800-257-8787.

Nuveen Investments provides high-quality investment services designed to help secure the long-term goals of institutions and high-net-worth investors as well as the consultants and financial advisors who serve them. Nuveen Investments markets its highly specialized investment teams, each with its own brand name and area of expertise: NWQ, specializing in value-style equities; Nuveen, managing fixed-income investments; Santa Barbara, committed to growth equities; Tradewinds, specializing in global value equities; Rittenhouse, focused on ?blue-chip? growth equities; and Symphony, with expertise in alternative investments as well as equity and income portfolios. In total, the Company manages $154 billion in assets. Nuveen Investments is listed on The New York Stock Exchange and trades under the symbol ?JNC.?