Nifty and Sensex rebounded after a 5% drop last week.Globally, sentiment was bolstered as November US PCE data cooled more than expected and eased fears of future rate hikes.Shares of HDFC Bank, Reliance Industries, and ITC contributed the most to Nifty's gains.Nine out of 11 sectoral indices ended higher, with Nifty Realty leading the gains.