<ul data-eligibleForWebStory="true">The National Stock Exchange's futures and options contracts expiry day will shift from Thursday to Tuesday.SEBI has mandated that all equity derivatives contracts must now expire exclusively on Tuesdays or Thursdays.Each exchange was allowed to choose one weekday for the weekly expiry of benchmark index options, pending SEBI approval.SEBI had requested preferences from stock exchanges on their chosen expiry day by June 15.The decision came after SEBI floated a consultation paper in March and discussed feedback with its Secondary Market Advisory Committee.