margin deficiencyglossary / MARGIN DEFICIENCY margin deficiency. Securities. The extent to which the amount of the required margin exceeds the equity in a margin account. [Cases: Securities Regulation 45.11.] 词条贡献者 资深译员Brendan,毕业于亚洲一流的高级翻译学院,擅长翻译各类与商业与人权诉讼相关的法律文件。