Stocks around the world tumbled Monday as investors braced for a week of market tumult caused by the expected announcement of yet more tariffs by President Trump on America’s biggest trading partners.

       Since taking office a little over two months ago, Mr. Trump has kept investors and companies guessing with a haphazard rollout of what he calls an “America First” trade policy. He has threatened, imposed and in some cases then paused the start of new tariffs on goods coming into the United States.

       On Monday, stocks in Japan and Taiwan fell more than 4 percent, while share prices in South Korea were down 3 percent. The Nikkei 225 index in Japan fell into a correction, down 12 percent from its high in late December. Technology companies were hit hard: Chipmakers Taiwan Semiconductor Manufacturing Company, SK Hynix, Samsung and Tokyo Electron recorded declines.

       Tracking Trump’s First 100 Days ？ The Trump administration’s previous actions on North American tariffs

       March 11 Notified Canada that its citizens would need to register when crossing the border into the United States ？ March 11 Walked back plans to double metal tariffs on Canada after escalating threats ？ March 6 Suspended many of the tariffs imposed on Canada and Mexico ？ March 5 Paused tariffs on cars from Canada and Mexico for a month ？ March 5 Accused Prime Minister Justin Trudeau of Canada of imposing tariffs on the U.S. “to stay in power” ？ Earlier entries about North American tariffs

       See every major action by the Trump administration ？

       Stocks Sink as Trump’s Tariff Threats Weigh on Confidence - The New York Times

       Losses in China were more muted. Hong Kong stocks dropped more than 1 percent and those in mainland China were about 0.5 percent lower. Mainland stocks got some support from a report signaling that China’s export-led industrial sector continues to expand despite Mr. Trump’s initial tariffs.

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       Markets in Europe opened lower, with the Stoxx 600 index falling about 1 percent. German automakers, which are particularly exposed to U.S. tariffs, extended recent losses: Volkswagen, Europe’s largest carmaker, fell more than 3 percent in Frankfurt.

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       Futures on the S&P 500, which allow investors to trade the benchmark index before exchanges reopen in New York in the morning, slumped. On Friday, the S&P 500 dropped 2 percent on concerns that Mr. Trump’s tariffs could recharge inflation and dampen consumer sentiment, dragging the index down to a fifth weekly decline in the past six weeks.

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