Market Retreats as New 15% Global Tariffs Spark Trade Uncertainty; Nvidia Earnings Loom

U.S. equity markets are experiencing a volatile start to the week this Monday, February 23rd, 2026, as investors grapple with a rapid escalation in trade policy tensions. Midday trading shows a definitive shift toward a "risk-off" sentiment, with major indexes retreating from recent highs. The primary catalyst for today’s downward momentum is the White House’s announcement of a new 15% global tariff on all imports, a move that follows a landmark Supreme Court ruling on Friday which had briefly struck down p ...