The president has already threatened an additional 10% tariff on goods from countries aligning themselves with a bloc of nations that includes China and Russia.

Trump initially sparked hysteria in the financial markets by announcing tariff rates on dozens of countries, including 24% on Japan and 25% on South Korea. In order to calm the markets, Trump unveiled a 90-day negotiating period during which goods from most countries were taxed at a baseline 10%.

P resident Trump is threatening 25% tariffs on Japan and South Korea after months of trade talks have yet to seal a deal. The S&P 500 turned lower in Monday afternoon trading, but investors know there's a good chance this won't be the final word.