SEBI directs that calendar spread margin benefit for single...

SEBI directs that calendar spread margin benefit for single stock derivatives will not be available on the expiry day for contracts expiring that day; this aligns single stock treatment with index derivatives and prevents sudden margin shortfalls. Calendar spread margin calculations remain unchanged for spreads not involving the expiring contract. Stock exchanges and clearing corporations must update systems and amend bye laws to implement the change. The measure is intended to give trading members and clients time to add margin or roll/close positions and takes effect three months from the circular date.