In the Market for Money | FINRA.org
www.finra.org › investors › insightsOct 26, 2015 · What Are Money Market Securities? Money market mutual funds invest in short-term, highly liquid securities, such as Treasury bills, commercial paper, bankers’ acceptances, and CDs. Treasury bills, or T-bills, are short-term fixed-income securities issued by the U.S. Treasury that mature anywhere from a few days to within a year.