The benchmark indices on Tuesday continued to trade flat even as Asian markets were trading higher after US president Donald Trump said he would make a "big" infrastructure statement on Tuesday.
Back home, investors also await December quarter GDP data due later in the day, which is estimated to come in at 6.4% year-on-year.
At 1:58 pm, the S&P BSE Sensex was trading at 28,795, down 17 points, while the broader Nifty50 was ruling at 8,890, down 16 points.
In the broader market, the BSE Smallcap index outperformed the frontline indices to rise 0.4%, while the BSE Midcap was

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