Which financial instruments are most commonly used as marketable securities?

These securities include U.S. Treasury bills, bonds and notes; bonds issued by other federal agencies and by state and local governments; bank instruments including acceptances, negotiable CDs, and repos; financial market instruments such as commercial paper, Euronotes, and variable-rate preferred stock; and money market mutual funds combining securities from one or more issuers. They all share the characteristics of relatively low risk and high liquidity and marketability.