<h1>Indian stocks tumble nearly 1% as US 100% tariff on branded drugs sparks heavy pharma, IT selling and outflows</h1> Benchmark Indian equity indices fell nearly 1% after the U.S. President announced 100% import tariffs on branded and patented pharmaceutical products effective October 1, triggering heavy selling in pharma and IT stocks and extending a six-day decline. The Sensex and Nifty hit three-week lows as healthcare and IT-heavy indices led losses; smallcap and midcap gauges fell over 1.9%. Market commentators said the tariff announcement, coupled with recent U.S. visa fee hikes and weak IT guidance, forced investors to reassess export and earnings prospects, prompting broad selloffs and significant foreign institutional outflows.