By Nupur Acharya and Siddhartha Singh
Less than an hour into trading in India’s $2.7 trillion stock market on Wednesday, dealers saw index levels on the National Stock Exchange’s cash segment had stopped updating. By 11:40 a.m., the world’s biggest derivatives bourse halted trading in all segments.
The incident prompted the markets regulator to ask the NSE to investigate why trading didn’t migrate to its disaster-recovery site to prevent the longest-ever trading outage the country has seen. The exchange handles the globe’s highest number of futures and options contracts, and with expiry looming Thursday, business was humming.