ETF
Exchange-traded fund: a basket of investments that trades on a stock exchange throughout the day, like a single stock.
An ETF holds many stocks, bonds or other assets. You buy and sell shares at the market price during the trading day, often with no commission at many brokerages.
Many ETFs are index funds with low expense ratios. Others focus on a narrow theme or use complex strategies, so read what the fund holds and what it costs before you buy.