** Nifty 50 NSE:NIFTY, BSE Sensex BSE:SENSEX rise 0.3% each, led by autos NSE:CNXAUTO, metals NSE:CNXMETAL
** NIFTYAUTO jumps 2.6%; Tata Motors NSE:TATAMOTORS, Mahindra & Mahindra NSE:M&M, Maruti Suzuki NSE:MARUTI announce price cuts to pass on GST rate rationalisation benefits
** TAMO climbs 3%; MAHM gains 3.5%; Hero MotoCorp NSE:HEROMOTOCO, Bajaj Auto NSE:BAJAJ_AUTO rise 3% each
** August retail car sales up 2.84% y/y, per Federation of Automobile Dealers Association data; festive season demand seen strengthening on tax cuts
** Tata Steel NSE:TATASTEEL, JSW Steel NSE:JSWSTEEL, SAIL NSE:SAIL lead NIFTYMET 1.3% higher
** Morgan Stanley upgrades TISC, JSTL, SAIL on hopes of stronger demand, China's steel reforms
** Small-cap NSE:CNXSMALLCAP up 0.5%, mid-cap NSE:CNXMIDCAP outperform adds 0.8%
** Adani Power NSE:ADANIPOWER jumps 5.3% on Bhutan hydropower deal; Swiggy NSE:SWIGGY gains 2% after Nomura starts with "buy"
** Currency, debt markets shut for local holiday; will reopen on Tuesday
** Settlement for day's trades to happen on Wednesday, not Tuesday, per SEBI