what is security finance
Part of the Business terms glossary: A security, in a financial context, is a certificate or other financial instrument that has monetary value and can be traded. Securities are generally classified as either equity securities, such as stocks and debt securities, such as bonds and debentures.The sale of securities to investors is one of the primary ways that publicly-traded companies drive new capital for operations.ecurities are generally classified as either equity securities, such as stocks and debt securities, such as bonds and debentures. The sale of securities to investors is one of the primary ways that publicly-traded companies drive new capital for operations.