An ETF (Exchange Traded Fund) is a basket of assets (stocks, bonds, commodities, crypto) listed on a stock exchange and tradable like a regular stock. Instead of buying 500 individual stocks to replicate the S&P 500, you buy 1 SPY ETF that does it for you.
Key benefits:
- Instant diversification: 1 purchase = exposure to dozens/hundreds of assets
- Ultra-low fees: typically 0.03-0.30%/year (vs 1.5-2% for active funds), thanks to passive management
- Intraday liquidity: buy/sell anytime during the session, unlike traditional funds (1 price/day)
- Transparency: composition published daily
Popular ETF types:
- Index: SPY (S&P 500), QQQ (Nasdaq 100), VWCE (FTSE All-World, popular in EU)
- Sector: XLF (US banks), XLK (tech)
- Commodities: GLD (gold), USO (oil)
- Spot Bitcoin: IBIT (BlackRock), FBTC (Fidelity) — approved in the US in January 2024, fueling a crypto bull run
EU-friendly ETFs (UCITS): most US ETFs are not directly tradable for EU retail investors due to PRIIPs regulation. Use UCITS-compliant equivalents (e.g., CSPX for S&P 500, VWCE for All-World) instead.