What is an exchange-trade fund? \ \ Multiple choice question.\ \ an individual bond that has a high risk of default and offers a relatively high rate of interest\ \ \ an agreement to purchase a quantity of goods at a fixed price on a certain date in the future \ \ \ a collection of stocks that is traded on an exchange and can be purchased or sold throughout the trading day.\ \ \ a collection of stocks that is traded on an exchange and can only be purchased after the end of a trading day