What are index funds and why are they a better investment than stocks?

An index fund automatically holds all (or most) stocks in a specific market index like the S&P 500 (500 largest US companies). When those companies grow, the fund grows.

Why index funds outperform most stock pickers:

1. Diversification: your money spreads across hundreds or thousands of companies. One failure barely affects you. Individual stocks tie your fate to one company.
2. Low cost: actively managed funds pay analysts to pick stocks annual fees of 1% or more. Index funds are managed by computers tracking the index fees as low as 0.03%. Over decades, this compounds enormously.
3. Performance: data shows most professional fund managers fail to beat a simple index fund consistently over 10–20 years. The index does not need to pick winners — it owns the whole market.

Warren Buffett has publicly recommended most ordinary investors put their money in a low-cost S&P 500 index fund rather than picking individual stocks.