Country's largest software service firm TCS in its outlook warned of weak December quarter on seasonality last Friday after market hours put pressure on market sentiment.
Also, lower factory output data along with subdued global markets amid falling crude prices, brought back nervousness, traders said.
The 30-share BSE Sensex resumed lower at 27,136.28, and fluctuated between a high of 27,359.54 and a low of 27,105.04 before quoting at 27,331.18 at 1015 hrs, a small loss of 19.50 or 0.07 per over its last close.
The NSE 50-share Nifty was also trading almost flat, down by a mere 0.10 points to quote at 8,224.00.
Foreign Portfolio Investors sold shares worth net Rs 864.96 crore last Friday as per provisional data.
Major losers were TCS (3.24 percent), Cipla (1.68 percent), GAIL (1.63 percent), Wipro (1.58 percent), Infosys (1.00 percent) and Dr Reddy's (0.84 percent).
Asian stocks were trading lower on continued slump in oil prices that stoked concerns of worsening global economic outlook.
Key indices in China, Hong Kong, Singapore, Indonesia, South Korea, Hong Kong and Taiwan were down 0.47 percent to 1.31 percent. PTI

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