The term "security" refers to a fungible, negotiable financial instrument that holds some type of monetary value. It represents an ownership position in a publicly-traded corporation via stock; a creditor relationship with a governmental body or a corporation represented by owning that entity's bond; or rights to ownership as represented by an option.

The 4 Types of Securities
1. Debt Securities
2. Equity Securities
3. Hybrid Securities
4. Derivative Securities

A bank guarantee is a type of financial backstop offered by a lending institution. The bank guarantee means that the lender will ensure that the liabilities of a debtor will be met. In other words, if the debtor fails to settle a debt, the bank will cover it. A bank guarantee enables the customer, or debtor, to acquire goods, buy equipment or draw down a loan.

A bank guarantee is when a lending institution promises to cover a loss if a borrower defaults on a loan. The guarantee lets a company buy what it otherwise could not, helping business growth and promoting entrepreneurial activity. There are different kinds of bank guarantees, including direct and indirect guarantees. Banks typically use direct guarantees in foreign or domestic business, issued directly to the beneficiary. Direct guarantees apply when the bank’s security does not rely on the existence, validity, and enforceability of the main obligation.