The National Stock Exchange (NSE) and Bombay Stock Exchange (BSE) have collectively imposed a fine of Rs 5.42 lakh on state-run telecom firm Mahanagar Telephone Nigam Ltd (MTNL) for failing to comply with regulatory disclosure requirements. The penalty reflects lapses in timely submission of corporate filings and adherence to listing norms mandated by SEBI. Exchange authorities emphasized the importance of compliance to ensure market transparency and investor protection.