Answer:
b). The average value of the 30 blue-chip stocks is down by 3.2%.
Step-by-step explanation:
'Dow Jones Industrial Average' also known as 'DJIA' is characterized as the standard indicator to denote the stock-market prices of the shares of the major companies associated with blue-chip in the United States.
As per the question, a down or fall in DJIA by 3.2% would indicate that the stock prices of the companies trading with 'blue-chip' have faced a reduction in their share prices by 3.2% for that day. So, this allows the investors to keep a check on the stock prices and invest accordingly whenever they find it profitable. Thus, option b is the correct answer as the other options fail to convey this idea rather they either talk about the loss of value instead of decrease(in options a and c) or disassociates the entire concept with the stock market(in option d).