Key global stock markets tumbled upon opening on Monday as the world’s reaction to President Donald Trump’s tariffs campaign continued — and as U.S. futures signaled more turmoil for American markets. In the U.S., Dow Jones futures were down about 1,200 points or 3.33% on Monday morning. S&P 500 and NASDAQ futures were down about 3.5%. A drop of 7% on the S&P 500 before 3:35pm ET will trigger a market-wide circuit breaker that will halt trading for 15 minutes. A currency trader reacts at the foreign exchange dealing room of the KEB Hana Bank headquarters in Seoul, South Korea, on April 7, 2025. Ahn Young-joon/AP Hong Kong leads Asian slide Tokyo’s Nikkei 225 index lost nearly 9% shortly after the market opened on Monday, the steep decline triggering a
