Final answer:
The Dow Jones Industrial Average is a value-weighted average of 30 large industrial stocks tracked on the New York Stock Exchange. It is used as a measure of the overall performance of the stock market and is often referred to as a barometer of the U.S. economy.
Step-by-step explanation:
The Dow Jones Industrial Average is a value-weighted average of 30 large industrial stocks tracked on the New York Stock Exchange. This means that the stocks in the index are weighted by their price, so higher-priced stocks have a greater impact on the index's value. The index is used as a measure of the overall performance of the stock market and is often referred to as a barometer of the U.S. economy.