His comments came in response to a query on whether Securities and Exchange Board of India would be initiating action against MCX-SX which rejigged its board yesterday amid continuing payment crisis at its group firm National Spot Exchange Ltd.
Without taking names, Sinha said the regulator would act to protect the interest of investors.
"I would like to assure all of you that Sebi is very alert that interests of investors, who are working on the platform of Sebi regulations, is not compromised and is protected.
"Whatever is required for that purpose, Sebi is alert and we are going to act," he said in New Delhi.
Speaking on the sidelines of an event organised by industry body PHD Chamber, Sinha emphasised the regulator would take "timely action" when there are instances of violating Sebi rules.
Asked about developments at MCX-SX, he said a certain plan of action has been
Jignesh Shah, Massey step down from MCX-SX board
1st arrest in NSEL scam, top official held
How the noose around Jignesh Shah was tightened
All exchanges might come to end on Delhi bourse
NSEL crisis: Lookout notice issued against Jignesh Shah