NirmalBang Back Office. NirmalBang BO is Nirmal Bang's official back office mobile application. The application enables clients registered with Nirmal Bang to connect with Backoffice to track the leisure account in Indian Equity, Derivatives, Commodities and Currency markets. Key Highlights:- - Notional Cash Segment - Notional Derivative Segment - Financial Statement - Client Snap Shot - Ultimate Delivery - Global Cash Net O/S - Global Derivative Net O/S Nirmal Bang Securities Pvt Ltd SEBI reg