On Sebi Mandate: The regulation was introduced to prevent excessive speculative trading and ensure orderly market conditions on expiry days. Consequently, the National Stock Exchange (NSE) has shifted its expiry day to Tuesday, while the Bombay Stock Exchange (BSE) has moved its expiry day to Thursday . SEBI's regulatory changes, including the adjustment of expiry days, aim to create a more structured and stable environment for equity derivatives trading. For BSE, these measures help maintain its competitive edge and ensure consistent market participation. Investors can anticipate a more predictable and secure trading experience as these regulations take.