* NSE index down 0.7 pct, BSE index falls 0.9 pct
* Infosys falls over 9 pct
* Markets set to post weekly gain
By Tanvi Mehta
Aug 18 (Reuters) - Indian shares fell on Friday, snapping a three-day winning streak, as Infosys Ltd Chief Executive Vishal Sikka’s resignation sent the stock tumbling, although rivals such as Tata Consultancy Services Ltd gained.
Sikka resigned as chief executive and managing director of Infosys with immediate effect and the country’s no.2 IT services company named U.B. Pravin Rao as his interim replacement.
Infosys shares fell as much 9.4 percent to their lowest since June 28, on way to their steepest intraday percentage loss since April 2013.
Sentiment was also hit as Asian shares joined a global retreat from riskier assets on rising doubts about U.S. President Donald Trump’s ability to deliver his economic agenda.
But Indian indexes were still headed for their sixth weekly gain in seven, though they remain below the record highs hit on Aug. 2.
“There is some dip because of Infosys. Market is under pressure, the uptrend which was there since December is under pressure,” said Anupam Singhi, chief operations officer, Marketsmith India, part of William O’Neil India.
The broader NSE index was down 0.74 percent at 9,830.40 as of 0636 GMT, but was up 1.3 percent for the week.
The benchmark BSE index was 0.88 percent lower at 31,513.91, but was up 1 percent for the week.
Drug makers, which have significant exports to the United States, also dropped, with the Nifty Pharma index falling as much as 1.7 percent.
But Infosys’ rivals gained, with Tech Mahindra and Tata Consultancy Services rising over 2.5 percent each.
Bank shares were also big drag on the indexes. (Reporting by Tanvi Mehta in Bengaluru; Editing by Gopakumar Warrier)