Exchange-Traded Funds (ETF) Guide
An ETF (Exchange-Traded Fund) is a fund that tracks an underlying basket of assets — an index, bonds, commodities, etc. — and trades on an exchange just like a stock. ETFs typically offer broader diversification than a single stock and lower fees than traditional mutual funds.
Well-known examples include SPY and VOO (tracking the S&P 500) and QQQ (tracking the Nasdaq-100), alongside many bond, commodity and emerging-market funds. Key things to consider when comparing ETFs are the underlying index, expense ratio, assets under management (AUM) and tracking error.
Key ETF Terms
Expense Ratio
Annual operating cost charged by the fund. Typical broad-market ETFs run from roughly 0.03% to 0.50%; lower fees compound favorably over the long term.
AUM (Assets Under Management)
Total value of assets the ETF manages. Larger AUM generally means deeper liquidity and lower risk of fund closure.
Tracking Error
How closely the ETF's return tracks its benchmark index. Smaller tracking error means the fund is reproducing the index more accurately.
Leveraged / Inverse ETFs
Track 2x, 3x or -1x the daily move of an index. Because they reset daily, returns over longer holding periods can diverge meaningfully from the underlying index.
Frequently Asked Questions
How is an ETF different from a regular stock?
An ETF holds a basket of underlying securities, providing built-in diversification, but trades intraday on an exchange just like a single stock.
SPY or VOO — which is better?
Both track the S&P 500 but are issued by different managers (SPY: State Street, VOO: Vanguard) with different expense ratios and liquidity profiles. ZivFin does not endorse one over the other; the right choice depends on your goals.
How do dividends work in an ETF?
Most ETFs distribute dividends quarterly or semi-annually; some funds reinvest distributions automatically. Refer to the fund issuer's official documentation for exact schedules.
Disclaimer: ETF information shown here is educational and does not constitute a recommendation to buy or sell any specific fund. Always read the official prospectus, including risks and fees, before investing.