Futures tumble as Trump's tariffs stoke trade war risks | Reuters

1. U.S. stock futures fell sharply due to increasing trade war fears. 2. Nvidia's stock slid 3%, indicative of broader chip industry downturn. 3. Sustained tariffs may hinder S&P 500 earnings growth by 2%-3%. 4. Major tech stocks, including Apple and Microsoft, also declined. 5. Global economic concerns triggered a shift towards safer assets.