On August 24, the Nifty declined close to 5.92 per cent, making it one of the worst single-day declines in history. Such panic days are rather common in the equity markets. However, that day, something unusual happened in the options markets. Here are some data points from that day. One, the Nifty declined 5.92 per cent or 490.95 points. Two, India VIX increased 64.36 per cent or 11.02 points....