The SENSEX Index decreased 600 points or 0.77 percent on Tuesday to close at 77016 points. The decline was led by HCL Tech (-4.64%), Tata Motors (-2.69%) and Bajaj Finserv (-2.28%). On the upside, the strongest performers were Bharti Airtel (1.69%), Sun Pharmaceuticals (1.23%) and Tata Steel (0.90%).