Stock market today, Oct. 17 -- India's stock benchmarks opened slightly lower on Friday, taking a breather after a recent surge, impacted by margin worries concerning Infosys and Wipro, despite both companies exceeding revenue predictions for the September quarter.

Sensex dropped 261.58 points to 83,206.08 in early trade; Nifty 50 declined 76.7 points to 25,508.60.

At the open, ten out of the 16 major sectors reported losses. The broader small-cap and mid-cap indices dropped by 0.1% and 0.4%, respectively.

The IT sector index decreased by 1.25%, with Wipro plummeting 4.5% even after surpassing second-quarter revenue forecasts, as analysts expressed concerns about margin pressures from new deals and recent acquisitions.

The Nifty 50 an...