What Is an ETF?
An ETF (exchange-traded fund) is a collection of investments, usually stocks or bonds, bundled together and sold as a single share on an exchange.
When you buy one share of a broad market ETF, you're effectively buying tiny slices of hundreds or thousands of companies at once. This is diversification made simple.
Why ETFs beat picking stocks (for most people)
Research consistently shows that actively picking individual stocks underperforms a simple index ETF over long time horizons, even for professional fund managers. Fees, taxes, and the difficulty of consistently predicting short-term stock movements all add up against the active picker.
An ETF that tracks the S&P 500 doesn't try to beat the market. It is the market, minus a tiny annual fee (often 0.03-0.20%). That's a powerful starting position.
How to read an ETF
When you look at an ETF, the key numbers are:
- Expense ratio: the annual fee, expressed as a percentage. Lower is almost always better.
- Tracking index: what the ETF is following (S&P 500, total world stock market, tech sector, etc.)
- Dividend yield: if the ETF pays out dividends, how much per year relative to the share price.
ETFs vs. mutual funds
Mutual funds work similarly but trade once per day at a set price. ETFs trade throughout the day like stocks. For most beginners, this distinction doesn't matter much. What matters is the fee structure and what the fund tracks.
Where to start
A single broad market ETF is a complete, sensible portfolio for a beginner. As your confidence and capital grow, you can add to it, not replace it.