option spreadglossary / OPTION SPREAD option spread. Securities. The difference between the option price and the market price of the underlying stock when the option is exercised. See SPREAD. 词条贡献者 译员黎川,在一家顶尖澳洲律师事务所的上海办公室担任全职法律翻译,专注翻译各种与澳大利亚业务有关的法律文件。