The Securities and Exchange Board of India (SEBI) has issued show cause notices to over 120 stockbrokers for their ongoing association with the algorithmic trading platform Tradetron, according to a report by NDTV Profit citing sources familiar with the matter. Some of the well-known brokerages that are receiving these notices include Bajaj Financial Securities, Motilal Oswal Financial Services, Zerodha and 5Paisa Capital.