Nifty 50 index closes 385 points higher at 21,737, whereas the Sensex settles 1.72 per cent at 71,915 levels, , stock market, nifty, sensex, national stock exchange, adani port, MRF Tyres, ongc, AU Small Finance Bank, IRB Infrastructure Developers (IRB), retail investors, Intraday, SJVN Green Energy, KFin Technologies