This document provides an introduction to money markets. It defines money markets as dealing in short-term financial assets with maturities of less than one year. The key players in money markets include central banks, commercial banks, and financial institutions. Common money market instruments discussed include treasury bills, certificates of deposit, and commercial paper. Treasury bills are low-risk securities issued by governments, while certificates of deposit and commercial paper are issued by banks and corporations respectively to meet short-term funding needs. Overall, the money market allows borrowers to access short-term funds and investors to deploy temporary cash reserves at low risk.