market intermediaryglossary / MARKET INTERMEDIARY market intermediary. Securities. A person whose business is to enter into transactions on both sides of the market. Investment Company Act, 15 USCA § 80a-3(c)(2)(B)(i). 词条贡献者 资深译员王漾,毕业于一所旨在培养高级翻译专业人才的翻译院校,擅长翻译各类与雇主商业秘密相关的法律文件。