An ETF (Exchange-Traded Fund) is an investment fund that trades on a stock exchange, similar to stocks. ETFs typically contain various assets, such as stocks, bonds, or commodities, and allow investors to buy and sell shares during trading hours. This type of fund provides diversification, as it contains a portfolio of different investments, thereby spreading the risk. ETFs are also liquid, meaning their shares can be traded anytime during the trading day, and they usually have lower fees compared to actively managed funds. There is a wide range of ETFs covering different markets, sectors, and investment strategies.