India’s market regulator Securities & Exchange Board of India (SEBI) is likely to grant the National Stock Exchange (NSE) Tuesday as the day for its expiry, sources with knowledge of the matter told CNBC-TV18.

Sources said that SEBI’s circular on index expiry days for the exchanges may come soon, where NSE is likely to have applied for Tuesday as its expiry day.

SEBI’s Secondary Market Advisory Committee (SMAC) recently met to discuss the rules on the expiry days for exchanges.
Currently, the BSE contracts expire on Tuesday, while the NSE contracts expiry takes place on Thursday.
In March, SEBI had issued a consultation paper suggesting that Tuesday and Thursday should be used as expiry days by the exchanges.

Sources suggest that if NSE gets Tuesday as its expiry day then it could be a negative for BSE as there could be a decline of 20% in Sensex options volumes, as large part of it could move to NSE.

Additionally, if NSE is indeed given Tuesday for its weekly expiry day, its market share in index options could rise by nearly 5%, according to sources.

In a response to reporters on this subject, SEBI Chairman Tuhin Kanta Pandey mentioned that the regulator will be issuing directions on expiry dates this months after comments are received on consultation paper.

While NSE has declined to comment, SEBI has not responded to CNBC-TV18’s query.

Shares of BSE have taken a nosedive post this CNBC-TV18 newsbreak, currently trading 5.2% lower at ₹6,928.