CBI quizzes OPG Security's Sanjay Gupta in NSE co-location case

The Central Bureau of Investigation (CBI) on Friday questioned Sanjay Gupta, the promoter of Delhi-based brokerage OPG Security, for allegedly manipulating the National Stock Exchange's (NSE) colocation system to gain unfair access to trading data.

According to a CBI official, Gupta in conspiracy with NSE officials “abused” the server architecture of the exchange. The probe agency believes that some of the exchange employees have facilitated in providing OPG access to their colocation servers between 2010 and 2012. This helped OPG obtain first access to market data, before other trading members, the official explained.  

Early this week, CBI has filed first