Which best describes what a market index does?

A market index is a resulting value created from the combination of several stocks and other  investment vehicles presenting its total value against a base value at a certain period. It is used to show the whole stock market at the same time keeping track with the way the market changes overtime. The practice of tracking the value of the stock market over a period of time can be used to benchmark to make a credible comparison of stock returns.

Amuscle thats keeping you from having  pain.

Answerwork group;