Pioneer Municipal High Income Opportunities Fund (MIO) Stock Chart & Stock Price History $11.38 +0.04 (+0.31%) Closing price 08/22/2025Extended Trading$11.38 0.00 (0.00%) As of 08/22/2025 05:23 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Share Share Chart Stock AnalysisChartDividendHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Pioneer Municipal High Income Opportunities Fund Stock Price Performance The Pioneer Municipal High Income Opportunities Fund (MIO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 6.14%, with a year-to-date return of -4.01%. In the past month, the stock has decreased 0.57%, reflecting recent market activity. As of the latest close, Pioneer Municipal High Income Opportunities Fund traded at $11.39 with a market cap of and volume of 18,839 shares. Receive MIO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Pioneer Municipal High Income Opportunities Fund and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Read our full terms of service and privacy policy. 5 Day Performance0.00%1 Month Performance-0.57%3 Month Performance-4.33%Year-To-Date Performance-4.01%1 Year Performance-6.14% MIO Stock Chart for Sunday, August, 31, 2025 MIO Chart by TradingView Pioneer Municipal High Income Opportunities Fund Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/29/2025$11.39$11.39$11.40$11.3618,839 shs$0.0008/28/2025$11.39$11.39$11.40$11.3618,839 shs$0.0008/27/2025$11.39$11.39$11.40$11.3618,839 shs$0.0008/26/2025$11.39$11.39$11.40$11.3618,839 shs$0.0008/25/2025$11.39$11.39-0.04%$11.40$11.3618,839 shs$0.0008/22/2025$11.36$11.39+0.31%$11.40$11.3618,839 shs$0.0008/21/2025$11.36$11.36$11.36$11.3418,917 shs$0.0008/20/2025$11.36$11.36$11.36$11.3424,962 shs$0.0008/19/2025$11.34$11.36+0.13%$11.36$11.3316,091 shs$0.0008/18/2025$11.35$11.34-0.09%$11.36$11.3324,559 shs$0.00 Get the Latest News and Ratings for MIO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Pioneer Municipal High Income Opportunities Fund and its competitors with MarketBeat's FREE daily newsletter. 08/15/2025$11.33$11.35+0.18%$11.36$11.3444,634 shs$0.0008/14/2025$11.34$11.33-0.04%$11.35$11.3155,295 shs$0.0008/13/2025$11.34$11.34$11.35$11.3228,750 shs$0.0008/12/2025$11.33$11.34+0.09%$11.36$11.3326,311 shs$0.0008/11/2025$11.32$11.33+0.04%$11.37$11.3078,806 shs$0.0008/08/2025$11.34$11.32-0.18%$11.33$11.3029,731 shs$0.0008/07/2025$11.36$11.34-0.13%$11.38$11.3423,018 shs$0.0008/06/2025$11.48$11.36-1.09%$11.45$11.29139,005 shs$0.0008/05/2025$11.49$11.48-0.04%$11.49$11.4528,792 shs$0.0008/04/2025$11.49$11.49-0.04%$11.51$11.4535,417 shs$0.0008/01/2025$11.45$11.49+0.35%$11.49$11.46100,418 shs$0.0007/31/2025$11.42$11.45+0.31%$11.45$11.4047,865 shs$0.0007/30/2025$11.45$11.42-0.31%$11.44$11.4039,016 shs$0.00 This page (NYSE:MIO) was last updated on 8/31/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredBONUS GUIDE - Ben Stein Prepares For the Next Financial CrisisWith inflation high, debt soaring, and global tensions rising, a financial storm may be brewing. 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