I'll likely keep most of my stocks throughout a market crash, but these three will let me sleep soundly at night.

Learn how index funds invest in market indexes like the S&P 500 for broad diversification and market performance replication.

The probability of a 30% U.S. stock market drop in the next year is estimated at 8%, based on options market-derived methodology. Survey and pundit-based crash probabilities are notably higher, but ...

The S&P 500's unprecedented concentration could drag on returns in the next decade.