Stock futures cratered Thursday after President Donald Trump unveiled sweeping tariffs of at least 10% and even higher for some countries, raising the risks of a global trade war that hits the already sputtering U.S. economy. Futures tied to the Dow Jones Industrial Average lost 1,200 points, or 2.8%, and were near their lowest levels of the session before the official market open. S&P 500 futures dropped 3.4% with the benchmark on pace for its biggest one-day loss since 2022. Nasdaq-100 futures lost about 4% as investors dumped risky growth shares.