Brokerage firms that not only assist in trades but also have research staffs that analyze firms and make recommendations about which stocks to buy or sell are called:

Answer

discount brokerage firms

full service brokerage firms

investment banking firms

stock advisory brokers

The correct answer is letter "B": full-service brokerage firms.

Explanation:

Full-service brokerage firms are the intermediaries between traders and the major stock exchanges that do not only allow investors to purchase and sell securities but also provide them with advice on what assets to invest in. These brokerage firms have an over-the-phone customer service department that can place trades or get out of trades on behalf of investors. Usually, in full - service brokerage firms charge higher fees.