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Established in the United States on November 19, 2003, the Nuveen Municipal High Income Opportunity Fund operates as a closed-end fixed income mutual fund. Nuveen Investments Inc. originally launched this fund, which is now jointly managed by Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC. Its investment strategy concentrates on the US fixed income markets, specifically targeting investment-grade, tax-exempt municipal securities as its primary holdings. This fund was previously identified as the Nuveen Municipal High Yield Opportunity Fund.

Nuveen Municipal High Income Opportunity Fund (NMZ) offers tax-exempt yields currently translating to 6%-8% taxable-equivalent for many investors. I maintain a bullish outlook on NMZ, reflecting attractive muni yields and strong recent performance. NMZ's primary objective is high current income exempt from regular federal tax, with a secondary focus on total return.

Nuveen Municipal High Income Opportunity Fund offers a 7.8% yield, trading at a 1.57% discount to NAV, appealing to income-focused investors. NMZ employs aggressive leverage (40.22% of assets) and targets unrated municipal bonds, amplifying both yield and risk, especially in high-rate environments. Dividend coverage remains weak; 2025 earnings are $0.21/share versus $0.79/share paid, risking further NAV erosion and potential payout cuts if rates stay elevated.

Shares of Nuveen Municipal High Income Opportunity Fund (NYSE: NMZ - Get Free Report) crossed below its 200-day moving average during trading on Friday. The stock has a 200-day moving average of $10.50 and traded as low as $10.00. Nuveen Municipal High Income Opportunity Fund shares last traded at $10.0650, with a volume of 609,971

Municipal bond closed-end funds (CEFs) are seeing narrowing discounts, with NXP and MHF offering the most compelling value in the space at present. Leverage costs are easing as the Fed cuts rates, which should improve distribution coverage and make leveraged muni CEFs more attractive. Of course, there are always risks that include increased volatility from leverage and sensitivity to long-term Treasury rates, but we've seen long-term rate stabilization within a fairly narrow range.

Nuveen Municipal High Income Opportunity Fund (NMZ) targets high current income exempt from federal tax, with total return as a secondary goal. I maintained a cautious stance on NMZ for most of 2025, favoring other opportunities due to relative value concerns. A discount to NAV is present, reversing the premium from my last review, making it more value-oriented.