MUMBAI: Benchmark stock indices Sensex and Nifty tumbled nearly 1 per cent on Friday, marking their sixth consecutive day of decline, following heavy selling in pharma and IT shares as US President Donald Trump announced 100 per cent duties on branded drugs from next month.

The 30-share BSE Sensex tanked 733.22 points or 0.90 per cent to settle at a three-week low of 80,426.46. During the day, it dropped 827.27 points or 1 per cent to 80,332.41.

The 50-share NSE Nifty tumbled 236.15 points or 0.95 per cent to an over three-week low of 24,654.70. The index has been on a decline since September 19, tanking over 3 per cent in six straight sessions. Sensex has tumbled by 2,587.50 points or 3.16 per cent in six sessions to Friday.

Most pharma shares dropped, dragging the BSE Healthcare inde

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