Original Margin Love Machine 16 years ago Original Margin Refer: initial security deposit, margin. The amount or margin required to cover a given position when it is entered into. Random Finance Terms for the Letter O Original Margin Original Maturity Origination OTC OTC Options Other Capital Other Current Assets Other Long Term Liabilities Other Sources Out-of-the-Money Option Recommended for you: Other Sources Other Capital Other Long Term Liabilities Other Current Assets