Indian markets rebounded sharply on Monday, December 23, following five days of steep declines. The Sensex surged 498.58 points, or 0.64%, to close at 78,540.17, with an intraday high of 78,918.12. The Nifty climbed 165.95 points, or 0.70%, to settle at 23,753.45. Broader markets saw gains, with the midcap index rising 186 points to 57,093 and the Nifty Bank index jumping 558 points to 51,318.