AI stocks wobble before the bell as Trump’s Greenland tariff threat rattles markets
New York, January 20, 2026, 06:50 ET — Premarket U.S. artificial intelligence stocks were mixed in premarket trading on Tuesday as stock index futures slid to one-month lows after President Donald Trump renewed tariff threats against Europe in a standoff over Greenland. Trump said extra 10% import tariffs would start on Feb. 1 and rise to 25% on June 1 unless a deal is reached, pushing up volatility after the long U.S. holiday weekend.