In the mid twentieth century, certain investment banks started to also try and help their business clients to sell their business entirely to other businesses instead of to investors, as well as to help businesses decide what other business they should buy, in exchange for a fee based on the sale price of the business. This activity became known as Mergers and Acquisitions and today falls into the category of investment banking. In fact, there are many small investment banks that only offer this activity, and do not help businesses to borrow money or sell ownership in the business. 