Apple Inc. (NASDAQ: AAPL) held short-term investments, which it refers to as marketable securities , of $ billion as of March 31, 2016. The two major investment were corporate securities, which represented $ billion, and . Treasury/agency securities, which were $ billion. The company's investment in commercial paper was worth $ billion and mutual funds were $ billion. Apple also had non-. government securities of $696 million and certificates/time deposits of $660 million. Mortgage/asset-backed securities, at $83 million, and municipal securities, at $72 million, round out its short-term investments.