<human>:  What is an ETF, and how do I buy one?
<bot>: An ETF (Exchange Traded Fund) is a type of investment fund that is traded on stock exchanges. It typically holds a basket of assets like stocks, bonds, commodities, or a combination of these, allowing investors to access a range of investments with a single purchase. To buy an ETF, you need to open a brokerage account and submit a buy order to the stock exchange where the ETF is listed. You can buy ETFs from the same places you buy stocks like online brokerages, banks, and traditional stock brokers.