Question $-$ What are the key differences between the S&P $500$ and the Dow Jones Industrial Average $($DJIA$)$ in terms of company representation and Index calculations?

$(1)$ The S&P $500$ represents a much larger number of companies and is market cap

$$weighted$,$ while the DJIA represents much fewer companies and its index is weighted based on company stock prices.

$(2)$ The S&P $500$ represents a much larger number of companies and is weighted based

$$on company stock prices, while the DJIA represents much fewer companies and its index is market cap weighted.

$(3)$ The S&P $500$ represents a much fewer number of companies and is weighted based

$$on company stock prices, while the DJIA represents a much larger number of companies and its index is market cap weighted.