The Average S&P 500 Bear Market Has Lasted 340 Days. Here's Why History Says That's Good News for Investors.
The S&P 500 (^GSPC +0.58%) has been riding a bull market for about four years now, and there’s little indicating that it will end soon.
Still, some investors are worried about a potential artificial intelligence stock bubble, and nearly half of S&P 500 stocks are already in bear market territory.