Vanguard S&P 500 ETFVOO

VOO, the Vanguard S&P 500 ETF, tracks the S&P 500 index, holding around 500 of the largest US companies in one low-cost fund. It is a favourite of long-term, buy-and-hold investors because of its very low expense ratio. Buying VOO gives you instant diversification across the broad US market in a single trade. Its value still moves with the stock market and can fall in a downturn — it is diversified, not risk-free. Invest with a long-term horizon and only money you can leave invested.