US Futures Tumble as White House Imposes 15% Tariff Following SCOTUS Ruling

US stock futures extended their decline on Monday, with S&P 500 and Nasdaq 100 contracts falling 0.5% and 0.6% respectively. The sell-off intensified after the Supreme Court ruled to limit presidential authority over tariff impositions, specifically targeting precedents set during the Trump administration. In a swift countermeasure, the current administration announced a 15% blanket tariff, escalating tensions between the executive and judicial branches. This move has heightened fiscal uncertainty, as the tech-heavy Magnificent Seven stocks faced broad selling pressure amid fears of renewed trade volatility. While Alphabet shares remained resilient following a Wells Fargo upgrade, the broader market remains focused on the potential for increased sovereign debt issuance. Investors are now reassessing long-term economic stability as the legal battle over trade policy unfolds.