Headlines at 11am on Sept 12: Sensex dips by 546 points, Nifty by 167.30 points

Most of the 30-Sensex constituents led by ICICI Bank, Hero Motocorp, Tata Motors, Axis Bank, Tata Steel, M&M, L&T,SBI, Adani Ports, Bajaj Auto, ONGC, Maruti Suzuki, Asian Paint,HDFC Ltd and HUL were trading in negative zone, falling by up to 3.36 per cent.