Sensex declines 400 points in early trade; Nifty tests 17,690 level

Sensex declines 400 points in early trade; Nifty tests 17,690 level

Equity benchmark indices opened on a muted note, with the Sensex falling nearly 400 points in early trade, dragged down by index heavyweights Infosys, RIL and HDFC twins amid an overall weak trend in Asian markets.