Asia markets slumped on Monday after Donald Trump slapped tariffs on Canada, Mexico and China, sparking fears of another bruising ‘America First’ trade war that could hit global growth. Japan’s Nikkei plunged more than two percent at one point on Monday and Hong Kong’s Hang Seng was down more than one percent.

Global stock markets slumped, the dollar strengthened, oil prices rose, with U.S. stock market futures down sharply Monday, after President Trump imposed tariffs on imports from key trading partners Mexico,

President Trump’s tariffs on Canada, China, and Mexico could upend U.S. trade. These nine charts show what’s at stake, what comes next, and why it matters.