U.S. stock markets are experiencing significant declines driven by intensified geopolitical tensions in the Middle East, coupled with ongoing interest rate hikes. The Nifty index has fallen below 22,500, indicating a broader negative sentiment across various indices. Institutional selling is surging as retail investors lose confidence, with fears of further declines amid no signs of market stabilization. This downturn follows a shifting market sentiment where major tech stocks had already been under pressure from rising oil prices and conflict-related uncertainties earlier in the month.