S&P 500 Index reached its highest quote on Jan 24, 2025 — 6,134.1 USD. See more data on the S&P 500 Index chart.
The lowest ever quote of S&P 500 Index is 666.3 USD. It was reached on Mar 6, 2009. See more data on the S&P 500 Index chart.
S&P 500 Index is just a number that lets you track performance of the instruments comprising the index, so you can't invest in it directly. But you can buy S&P 500 Index futures or funds or invest in its components.