MainStay S&P 500 Index Fund Investor Class (MYSPX) NASDAQ

Currency In USD

MYSPX Historical Return

If you invested $1000 in MainStay S&P 500 Index Fund Investor Class (MYSPX) 10 years ago, it would be worth $3,754.26 as of August 23, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $1,724.01, while $1000 invested 1 year ago would be worth $1,197.59. This corresponds to total returns of 275.43%, 72.4%, 19.76%, respectively, with annualized returns of 14.14%, 11.5%, 19.76%.

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

MYSPX Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low
August 21, 2026	81.22	81.22	81.22	81.22	81.22
August 20, 2026	81.93	81.22	81.22	81.93	81.22
August 19, 2026	81.75	81.75	81.75	81.75	81.75
August 18, 2026	82.31	82.31	82.31	82.31	82.31
August 17, 2026	82.74	82.74	82.74	82.74	82.74
August 14, 2026	82.38	82.87	82.87	82.87	82.38
August 13, 2026	82.34	82.34	82.34	82.34	82.34
August 12, 2026	82.38	82.12	82.12	82.38	82.12
August 11, 2026	82.38	82.38	82.38	82.38	82.38
August 10, 2026	82.43	82.43	82.43	82.43	82.43
August 07, 2026	81.92	81.92	81.92	81.92	81.92
August 06, 2026	82.06	82.06	82.06	82.06	82.06
August 05, 2026	82.21	82.21	82.21	82.21	82.21
August 04, 2026	80.76	80.76	80.76	80.76	80.76
August 03, 2026	79.58	79.58	79.58	79.58	79.58
July 31, 2026	79.03	79.03	79.03	79.03	79.03
July 30, 2026	77.74	77.74	77.74	77.74	77.74
July 29, 2026	78.94	78.94	78.94	78.94	78.94
July 28, 2026	78.77	78.77	78.77	78.77	78.77
July 27, 2026	78.76	78.76	78.76	78.76	78.76
July 24, 2026	78.72	78.72	78.72	78.72	78.72
July 23, 2026	79.68	79.68	79.68	79.68	79.68
July 22, 2026	79.79	79.79	79.79	79.79	79.79
July 21, 2026	79.09	79.09	79.09	79.09	79.09
July 20, 2026	79.24	79.24	79.24	79.24	79.24
July 17, 2026	79.24	79.24	79.24	79.24	79.24
July 16, 2026	80.46	80.46	80.46	80.46	80.46
July 15, 2026	80.46	80.46	80.46	80.46	80.46
July 14, 2026	80.16	80.16	80.16	80.16	80.16
July 13, 2026	80.5	80.5	80.5	80.5	80.5
July 10, 2026	80.15	80.15	80.15	80.15	80.15
July 09, 2026	79.51	79.51	79.51	79.51	79.51
July 08, 2026	79.51	79.51	79.51	79.51	79.51
July 07, 2026	80.09	80.09	80.09	80.09	80.09
July 06, 2026	80.09	80.09	80.09	80.09	80.09
July 02, 2026	79.51	79.51	79.51	79.51	79.51
July 01, 2026	79.68	79.68	79.68	79.68	79.68
June 30, 2026	79.05	79.05	79.05	79.05	79.05
June 29, 2026	78.13	78.13	78.13	78.13	78.13
June 26, 2026	78.17	78.17	78.17	78.17	78.17
June 25, 2026	78.18	78.18	78.18	78.18	78.18
June 24, 2026	78.26	78.26	78.26	78.26	78.26
June 23, 2026	79.39	79.39	79.39	79.39	79.39
June 22, 2026	79.69	79.69	79.69	79.69	79.69
June 18, 2026	78.83	78.83	78.83	78.83	78.83
June 17, 2026	79.79	79.79	79.79	79.79	79.79
June 16, 2026	80.25	80.25	80.25	80.25	80.25
June 15, 2026	78.93	78.93	78.93	78.93	78.93
June 12, 2026	78.93	78.93	78.93	78.93	78.93
June 11, 2026	78.53	78.53	78.53	78.53	78.53
June 10, 2026	78.45	78.45	78.45	78.45	78.45
June 09, 2026	78.65	78.65	78.65	78.65	78.65
June 08, 2026	78.42	78.42	78.42	78.42	78.42
June 05, 2026	80.54	80.54	80.54	80.54	80.54
June 04, 2026	80.2	80.2	80.2	80.2	80.2
June 03, 2026	80.8	80.8	80.8	80.8	80.8
June 02, 2026	80.8	80.8	80.8	80.8	80.8
June 01, 2026	80.48	80.48	80.48	80.48	80.48
May 29, 2026	80.3	80.3	80.3	80.3	80.3
May 28, 2026	79.84	79.84	79.84	79.84	79.84