Analyst: As soon as Trump's tariff threat emerged, market optimism dissipated.

On Friday, U.S. President Donald Trump stepped up his trade threats, targeting smartphone giant Apple Inc. and imports from across the European Union, and after weeks of easing, global markets fell back into turmoil. Trump has threatened to impose a 25 percent tariff on any iPhone that Apple sells but does not produce in the United States; He also proposed a 50% tariff on the EU from June 1, which would lead to high tariffs on luxury goods, medicines and other goods produced by European manufacturers. After the news broke, the market generally fell. S&P 500 futures were down 1.5% premarket, and Euro Stoxx 600 was down 2%. Apple shares fell 3.5% in pre-market trading, and other tech stocks also fell sharply. Market analyst Fawad Razaqzada commented: "All the optimism about a trade deal evaporated in minutes or even seconds. ”