This document defines and describes different types of securities. It discusses that securities can be traded financial instruments with monetary value, and are generally classified as equity securities like stocks or debt securities like bonds. Equity securities represent ownership in a company, while debt securities represent money owed by a borrower to a lender. Some key types of securities discussed include common stock, preferred stock, corporate bonds, treasury bonds, and derivatives. Derivatives derive their value from an underlying asset and can be used for hedging or accessing additional markets.