Mumbai: Indian equity benchmarks opened higher on Friday tracking positive domestic cues and buying in information technology (IT) sector stocks despite weak global signals. Sensex opened at 73,665.64, an increase of over 400 points or 0.57 per cent, while Nifty started at 22,742.20, up 54.55 points or 0.24 per cent. Sectorally, the market rally was.