On Friday, Sebi penalised the exchange and two of its former heads over irregularities in hiring its erstwhile group operating officer Anand Subramanian.
The exchange said market regulator Sebi has tightened its oversight over market infrastructure institutions (MIIs).
"Sebi has also instituted various changes in the governance structure of MIIs, including board committee structures and oversight, tenor of management, accountability for lapses at MIIs, which have strengthened the control environment. Sebi has been closely monitoring and supervising the operations of NSE and other MIIs," it said.