The watchdog has already issued show-cause notices to the National Stock Exchange (NSE) and several of its current and former executives as part of its investigation into alleged lapses in high-frequency trading offered through NSE's co- location facility.
Briefing reporters after its board meeting today, Sebi Chairman Ajay Tyagi today said the regulator is examining the exchange's response to the show-cause notice.
Besides, the regulator will engage the forensic auditor in the NSE co-location case to probe if brokers made unfair gains in connivance with exchange officials.
The case relates to some brokers allegedly getting preferential access through co-location facility at the NSE, early login and 'dark fiber' -- which can allow a trader a split-second faster access to data feed of an exchange.
Even a split-second faster access is considered to result in huge gains for a trader.
Some staff members allegedly told the forensic auditors appointed by the NSE that they acted on "advice from seniors" regarding preferential access for some to the co-location facility.
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