Bilkul Bazaar New Delhi | US stock futures tumbled on Tuesday, signalling a weak start for Wall Street, as a global selloff in technology shares reignited concerns over whether massive investments in artificial intelligence (AI) can justify soaring market valuations. Nasdaq 100 futures fell more than 2 per cent, while S&P 500 futures declined over … Continue reading Global tech sell-off: Why Nasdaq, S&P 500 futures, Nifty IT declined today