Thursday turned out to be terrific rollercoaster ride for the Indian stock market as benchmark indices—the Nifty 50 and Sensex reversed early losses to post strong gains on May 15. With bulls getting back into action, the Nifty 50 marched past the 25,100-mark for the first time since October last year, while the Sensex leapt 1,400 points or nearly 2% to its day’s high.