<p>Telecom disruptions forced National Stock Exchange to shut all trading on Wednesday, leaving investors stranded ahead of the crucial expiry of monthly derivative contracts.</p>.<p>The NSE, headquartered in India's financial capital Mumbai, is the world's largest derivatives bourse by volume and the third-largest stock exchange globally in terms of the number of equity trades, according to its annual report https://static.nseindia.com//s3fs-public/inline-files/NSE_Annual_Report_2020.pdf.</p>.<p>The stock exchange had faced a similar systems glitch in 2017 that led to a five-hour-long shutdown https://www.reuters.com/article/india-nse-idINKBN19V09L?edition-redirect=in, prompting the market regulator to call for a review of the bourse's contingency plans.</p>.<p>"(Trading in) all the segments have been closed at 1140 IST and will be restored as soon as issue is resolved," the NSE said in a statement on Wednesday.</p>.<p>"The NSE outage is unfortunate, especially for this long. Global exchanges should have adequate backups to ensure that even if there is an outage it's restored fast," said Sandip Sabharwal, a Mumbai-based fund manager.</p>.<p>"Asian markets saw a significant crash on Wednesday, and at such times, price discovery real-time becomes even more important."</p>.<p>The blue-chip stock index NSE Nifty 50 last traded up 0.77 per cent at 14,820.25 before the halt. The S&P BSE Sensex index was up 0.51 per cent at 50,005.93, as of 0809 GMT.</p>.<p>Market regulator Securities and Exchange Board of India (SEBI) did not immediately respond to Reuters' request for a comment on the NSE trading halt. </p>
<p>Telecom disruptions forced National Stock Exchange to shut all trading on Wednesday, leaving investors stranded ahead of the crucial expiry of monthly derivative contracts.</p>.<p>The NSE, headquartered in India's financial capital Mumbai, is the world's largest derivatives bourse by volume and the third-largest stock exchange globally in terms of the number of equity trades, according to its annual report https://static.nseindia.com//s3fs-public/inline-files/NSE_Annual_Report_2020.pdf.</p>.<p>The stock exchange had faced a similar systems glitch in 2017 that led to a five-hour-long shutdown https://www.reuters.com/article/india-nse-idINKBN19V09L?edition-redirect=in, prompting the market regulator to call for a review of the bourse's contingency plans.</p>.<p>"(Trading in) all the segments have been closed at 1140 IST and will be restored as soon as issue is resolved," the NSE said in a statement on Wednesday.</p>.<p>"The NSE outage is unfortunate, especially for this long. Global exchanges should have adequate backups to ensure that even if there is an outage it's restored fast," said Sandip Sabharwal, a Mumbai-based fund manager.</p>.<p>"Asian markets saw a significant crash on Wednesday, and at such times, price discovery real-time becomes even more important."</p>.<p>The blue-chip stock index NSE Nifty 50 last traded up 0.77 per cent at 14,820.25 before the halt. The S&P BSE Sensex index was up 0.51 per cent at 50,005.93, as of 0809 GMT.</p>.<p>Market regulator Securities and Exchange Board of India (SEBI) did not immediately respond to Reuters' request for a comment on the NSE trading halt. </p>