Type of institutions that write securities, engage in brokerage and security trading are considered as

Answer: Option C

Type of institutions that write securities, engage in brokerage and security trading are considered as investment banks. An investment bank (IB) is a financial intermediary that performs a variety of services. Most Investment banks specialize in large and complex financial transactions, such as underwriting, acting as an intermediary between a securities issuer and the investing public, facilitating mergers and other corporate reorganizations and acting as a broker or financial adviser for institutional clients.