Why do we have banks? Why do we have stock markets?

Banks take customer deposits in return for paying customers an annual interest payment. ... These loans and business investment are important for enabling economic growth.                                                                                 The stock market serves two very important purposes. The first is to provide capital. It is a measure of a company's liquidity and its ability to meet short-term obligations as well as fund operations of the business. The ideal position is to to companies that they can use to fund and expand their businesses

Explanation:

answer; the period of time known as the middle ages;