ETF vs Mutual Fund

ETFs (Exchange-Traded Funds) and Mutual Funds are both pooled investment vehicles that hold a basket of securities, but they differ significantly in how they are traded, priced, and taxed. Understanding these differences is critical for building a cost-efficient, tax-optimized portfolio.

The most fundamental difference is trading mechanics. ETFs trade on stock exchanges throughout the day like individual stocks, with real-time price discovery. Mutual funds are priced once per day after the market closes (Net Asset Value / NAV), and investors can only buy or sell at that end-of-day price.

ETFs are generally more cost-efficient than actively managed mutual funds. The average actively managed mutual fund has an expense ratio of 0.5–1.5%, while index ETFs typically charge 0.03–0.20%. Over 30 years, this seemingly small difference can compound into hundreds of thousands of euros of lost wealth.

For European investors, UCITS ETFs are the standard instrument. They offer all the benefits of ETFs (low cost, intraday trading, transparency) while complying with EU regulations. Since 2018, PRIIPs regulations effectively banned EU retail investors from purchasing US-listed ETFs like SPY, making UCITS ETFs the only compliant option.