Vanguard S&P 500 ETF VOO

VOO tracks the 500 largest US companies by market cap, approximately 80 percent of total US market value. Expense ratio 0.03 percent. It is the largest ETF in the world by assets under management at over 600 billion dollars as of 2026. Warren Buffett has instructed his estate be invested 90 percent in VOO. The S&P 500 has returned an average of 10.2 percent annually since 1957 including dividends. Best for investors who want maximum simplicity and liquidity.