Market LIVE updates: Sensex down 600 pts, Nifty sub-16250; Tech Mahindra falls

… to gas to oil switch (Singapore GRMs at over USD18… : PTI  Travel and hospitality technology platform OYO on Monday said …   Shares of Reliance Industries, HCL Tech, LTI, Mindtree, Tata Power, … deals  Nifty futures on the Singapore Exchange fell 199 points, …