worthless securityglossary / worthless security A security that has lost its value, for which a loss (usu. capital) is allowed for tax purposes. IRC (26 USCA)§ 165. [Cases: Internal Revenue 3429.] 词条贡献者 法律翻译Glen,毕业于英国一流的高级翻译学院,专注翻译各类与交易架构和策略有关的法律文件。