Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) NYSE

Currency In USD

MIO Historical Return

If you invested $1000 in Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) since IPO date, it would be worth $689.58 as of August 22, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $685.02, while $1000 invested 1 year ago would be worth $999.56. This corresponds to total returns of -31.04%, -31.5%, -0.04%, respectively, with annualized returns of -7.1%, -7.29%, -0.04%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

MIO Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
August 25, 2025	11.41	11.41	11.41	11.41	11.41	0
August 22, 2025	11.36	11.39	11.39	11.4	11.36	18,839
August 21, 2025	11.34	11.35	11.35	11.36	11.34	18,917
August 20, 2025	11.34	11.34	11.34	11.36	11.34	25,000
August 19, 2025	11.33	11.36	11.36	11.36	11.33	16,100
August 18, 2025	11.35	11.34	11.34	11.36	11.33	24,600
August 15, 2025	11.34	11.35	11.35	11.36	11.34	44,634
August 14, 2025	11.33	11.33	11.33	11.35	11.31	55,300
August 13, 2025	11.35	11.34	11.34	11.35	11.32	28,800
August 12, 2025	11.33	11.34	11.34	11.36	11.33	26,311
August 11, 2025	11.34	11.33	11.33	11.37	11.3	78,806
August 08, 2025	11.31	11.32	11.32	11.33	11.3	29,731
August 07, 2025	11.34	11.34	11.34	11.38	11.34	23,018
August 06, 2025	11.43	11.36	11.36	11.45	11.29	139,005
August 05, 2025	11.45	11.47	11.47	11.49	11.45	28,800
August 04, 2025	11.45	11.49	11.49	11.51	11.45	35,417
August 01, 2025	11.46	11.48	11.48	11.49	11.46	100,418
July 31, 2025	11.42	11.45	11.45	11.45	11.4	47,900
July 30, 2025	11.4	11.41	11.41	11.44	11.4	39,016
July 29, 2025	11.42	11.45	11.45	11.48	11.39	22,800
July 28, 2025	11.4	11.4	11.4	11.42	11.38	67,233
July 25, 2025	11.4	11.45	11.45	11.45	11.37	47,200
July 24, 2025	11.48	11.42	11.42	11.52	11.42	30,019
July 23, 2025	11.54	11.54	11.54	11.57	11.53	92,200
July 22, 2025	11.56	11.56	11.56	11.57	11.53	84,432
July 21, 2025	11.58	11.56	11.56	11.58	11.51	166,700
July 18, 2025	11.56	11.55	11.55	11.6	11.54	363,004
July 17, 2025	11.61	11.56	11.51	11.62	11.5	121,800
July 16, 2025	11.71	11.6	11.55	11.71	11.59	74,235
July 15, 2025	11.78	11.7	11.65	11.78	11.67	144,420
July 14, 2025	11.77	11.74	11.69	11.78	11.73	111,100
July 11, 2025	11.79	11.74	11.69	11.79	11.74	87,300
July 10, 2025	11.81	11.79	11.74	11.85	11.78	53,700
July 09, 2025	11.81	11.81	11.76	11.85	11.8	37,900
July 08, 2025	11.8	11.8	11.75	11.84	11.78	135,700
July 07, 2025	11.85	11.8	11.75	11.88	11.79	75,900
July 03, 2025	11.86	11.83	11.78	11.9	11.83	45,302
July 02, 2025	11.83	11.86	11.81	11.9	11.83	49,708
July 01, 2025	11.84	11.84	11.79	11.89	11.8	55,245
June 30, 2025	11.85	11.8	11.75	11.88	11.8	78,100
June 27, 2025	11.81	11.8	11.75	11.84	11.78	56,900
June 26, 2025	11.83	11.82	11.77	11.85	11.78	16,624
June 25, 2025	11.78	11.8	11.75	11.84	11.78	35,400
June 24, 2025	11.76	11.81	11.76	11.83	11.76	50,200
June 23, 2025	11.77	11.76	11.71	11.8	11.75	39,536
June 20, 2025	11.76	11.74	11.69	11.8	11.73	486,024
June 18, 2025	11.88	11.76	11.71	11.9	11.74	47,000
June 17, 2025	11.88	11.9	11.8	11.92	11.85	26,747
June 16, 2025	11.9	11.88	11.78	11.91	11.86	62,400
June 13, 2025	11.81	11.86	11.76	11.95	11.81	21,509
June 12, 2025	11.86	11.83	11.73	11.9	11.83	29,900
June 11, 2025	11.89	11.86	11.76	11.91	11.81	86,302
June 10, 2025	11.89	11.85	11.75	11.9	11.79	60,248
June 09, 2025	11.82	11.84	11.74	11.9	11.82	21,300
June 06, 2025	11.85	11.82	11.72	11.85	11.8	29,229
June 05, 2025	11.85	11.85	11.75	11.9	11.84	42,110
June 04, 2025	11.85	11.84	11.74	11.9	11.83	58,300
June 03, 2025	11.81	11.81	11.71	11.84	11.8	23,500
June 02, 2025	11.9	11.81	11.71	11.97	11.75	105,621
May 30, 2025	11.93	11.9	11.8	11.97	11.84	26,235