Marketable securities are unrestricted financial instruments which can be readily sold on a stock exchange or bond exchange. Marketable securities are often classified into two groups: marketable equity securities and marketable debt securities.
Marketable equity securities include shares of common stock and most preferred stock which are traded on a stock exchange and for which there are quoted market prices.
Marketable debt securities include government bonds and corporate bonds which are traded on a bond exchange and for which there are quoted market prices.