<h1>Presidential Tariff Threats Rattle Global Markets, Spark Investor Uncertainty and Potential Economic Disruption</h1> Stock markets experienced significant volatility after presidential tariff threats targeting the European Union and specific companies like Apple. Indices including S&P 500, Dow Jones, and Nasdaq declined, with European markets also falling. The threatened 50% tariffs on EU imports and potential 25% tariff on iPhones manufactured outside the United States triggered investor uncertainty. Several companies adjusted financial forecasts, reflecting economic pressures from potential trade restrictions, while investors sought safer investment options like gold.