A financial institution where you can deposit money and receive other services. Banks can transfer money from one person or business to another and lend money to individuals and businesses. They get the money to lend from deposits. The Federal Reserve requires banks to keep a certain percentage of their deposits in reserve at all times, so the money is there for depositors to withdraw at will. Banks also issue debit and credit cards, guarantee signatures and provide ATM machines, safe deposit boxes and trust and investment services, including certificates of deposit and individual retirement accounts (IRAs).