Many have pitched the Total Stock Market index as a superior alternative to the S&P 500. Let's check out how they differ. 
https://www.valuewalk.com/2020/02/sp-500-vs-total-stock-market-index/
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SPDR S&P 500 (AMEX:SPY)
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From Mar 2023 to Mar 2024 Click Here for more SPDR S&P 500 Charts.