Sensex extends losses to 5th session, ends 139 pts lower; Nifty below 17,550

In the Sensex pack, Asian Paints, L&T, Titan, IndusInd Bank and Bharti Airtel were the top laggards, falling about 1-3% each. On the flip side, Axis Bank, SBI, Tata Motors, Tata Steel and ITC closed with gains.