U.S. equity futures tumbled in early Monday trading, while energy prices leaped and the dollar soared to a two-year high against its currency peers as markets reacted to the weekend tariff announcements of President Donald Trump and their potential to trigger a global trade war.

Stock market returns under presidential administrations are more correlation than causation, regardless of what political pundits say.

Global shares are mostly declining as worries grow about President Donald Trump imposing tariffs on key U.S. trading partners.

Global markets buckled up for a turbulent session Monday after Trump launched a trade war with sweeping tariffs on Canada, Mexico, and China.

US stock market futures were tending down Sunday, one day after President Donald Trump announced 25% tariffs on Canada and Mexico and 10% tariffs on China.

Stocks on Wall Street surrendered early gains and closed broadly lower Friday after the White House said President Donald Trump would impose promised tariffs on key U.S. trading partners. The S&P 500 fell 0.

Futures for Canada's main stock index fell sharply on Monday, part of a global market selloff after U.S. President Donald Trump announced tariffs on Canada, Mexico and China, starting on Tuesday. March futures on the S&P/TSX index were down 1.

The German and French stock markets were down about 2%, with shares in carmakers among the worst hit, while London's FTSE 100 dropped more 1%. The US dollar also strengthened on the currency markets,