The S&P 500 index currently has a CAPE ratio of 38 which is above the 40 year's average CAPE ratio. This valuation indicates that S&P 500 is overvalued. However, there other considerations suggest it is not overvalued comparing to the past.
https://njurlife.com/is-sp-500-overvalued-should-i-invest-in-a-high-risk-index/
But an S&P fund can generally be a good choice if you want to add broad exposure to the U.S. stock market to your portfolio. “The S&P 500 is a key part of a diversified investing strategy because it’s a good bet that the U.S. economy will continue to succeed and grow in the long term,” says Tony Molina, senior product specialist at Wealthfront.
https://www.nerdwallet.com/article/investing/how-to-invest-in-sp500
3 reasons why the iShares S&P 500 ETF (ASX:IVV) could be a great investment iShares S&P 500 ETF has very low fees. Out of all of the options that ASX investors can choose from, the iShares S&P 500 ETF is one of the lowest ... Diversification. Diversification can be an important part of lowering risk over time from shares, or any investment. ... Historical returns. ...
https://www.fool.com.au/2021/07/13/3-reasons-why-the-ishares-sp-500-etf-asxivv-could-be-a-great-investment/
How to Calculate an S&P 500 Return Use index values to calculate gross return. As an example, say a $1,000 investment was made on April 25, 2005. Annualize gross return. The average per-year return would be 4.29 / 5 = 0.858 percent. ... Factor in the annual expense ratio. ... There are no taxes due between 2005 and 2009 because the money is invested in the fund, not available for spending. More items...
https://www.sapling.com/6454574/calculate-sp-500-return
pdf for "s p 500 total return calculator".(Page 1 of about 17 results)