Investors saw their wealth rise by ₹7.94 lakh crore on Tuesday as Sensex registered its biggest single-day gain since 2009, rising 8.97% or 2,476 points. Nifty 50 closed 8.76% higher at 8,792 for the first time since March 17. BSE-listed companies' average m-cap increased from ₹108 lakh crore recorded on April 3 to ₹116 lakh crore on April 7.