Taking cues from global markets, the key Indian equity market indices opened flat on Thursday. The Sensitive Index (Sensex) of the BSE, which had closed at 27,257.64 points on Wednesday, opened lower at 27,253.34 points. 

Minutes into trading, it was quoting at 27,232.62 points, down by 25.02 points, or 0.09 per cent. At the National Stock Exchange (NSE), the broader 51-scrip Nifty, which had closed at 8,417 points, was quoting at 8,412.45 points, down by 4.55 points or 0.05%. 

On Wednesday, broadly positive Asian indices and healthy third-quarter (Q3) results buoyed investors' sentiments and the Indian equities markets closed on flat-to-positive note. However, profit booking, a weakened rupee and caution ahead of US Federal Reserve chairman Janet Yellen's speech on monetary policy capped gains.

The Sensex was up by just 21.98 points or 0.08% at the Wednesday's closing. In the day's trade, the barometer 30-scrip sensitive index had touched a high of 27,422.67 points and a low of 27,217.65 points. The Nifty, was up by only 19 points or 0.23%.