Economic Definition of junk bond. Defined.
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Term junk bond Definition: A bond, usually a corporate bond, that has a higher than average risk of default, but which pays a higher than average interest rate to compensate. Junk bonds were a popular method of investment during the 1970s and 1980s, especially to finance corporate mergers. Junk bounds held by savings and loan associations that defaulted were a major source of problems during the 1980s.