Volatility is back to the fore at the start of a new quarter. The Sensex opened flat today despite weak global markets, with banking stocks providing some support. Asian stocks extended a global selloff as an escalating trade spat between the US and China sapped investor confidence. The Sensex was up 50 points while Nifty rose to 10,227. The Sensex had started the quarter on a strong note, rising nearly 0.90 per cent on Monday. A renewed slump in tech shares such as Amazon.com on the Wall Street also hurt the investor sentiment. Japan’s Nikkei slipped 1.1 per cent while South Korea’s KOSPI index skidded about 1 per cent.