It’s been a quarter of a century since the National Stock Exchange made its debut. The late RH Patil, an institution builder, was not just instrumental in setting up the country’s first electronic demutualised stock exchange, but also went on to create the National Securities Depository, the National Securities Clearing Corporation and the Clearing Corporation of India. NSE has since become synonymous with stock trading, given that today it commands over 90% of both the cash and derivatives market, leaving Asia’s oldest bourse, the Bombay Stock Exchange, as a marginal player.