Answer:
That statement is true.
Step-by-step explanation:
The Dow Jones Industrial Average was created by former wall street journal editor named Charles Dow along with Famous statistician named Edward Jones. It measures the average financial performances of top companies in the stock exchange.
Brokers often see this to know what happened in the market. They operated based on the the perceptions that if the leaders of the industry are not doing well, the rest of the industries would most likely experience the same hardship.