Key Asian stock markets tumbled upon opening on Monday as the world's reaction to President Donald Trump's tariffs campaign continued -- and as U.S. futures signaled more turmoil for American markets.

Stocks continued to tumble in the U.S. Friday as financial markets suffered their biggest two-day drop since 2020.

Stocks fell sharply in early trading Monday, extending last week's massive sell-off, as the Trump administration showed no signs over the weekend of backing down from its plan to impose wide-ranging tariffs.

Shares of GE Vernova Inc. rose 5.37% to $286.07 Monday, on what proved to be an all-around rough trading session for the stock market, with the S&P 500 Index falling 0.23% to 5,062.25 and Dow Jones Industrial Average falling 0.

Stock futures slid as Trump administration officials said they will be steadfast in implementing the tariff regime announced Wednesday.

The trading curbs go into effect when the S&P 500 crosses certain thresholds during extreme market volatility.

An untrue report about a possible 90-day pause on President Donald Trump’s widespread tariffs caused massive swings in the stock market - as all the major markets went from major losses to significant gains back to steep losses in a matter of minutes.

Stocks are swinging sharply still after President Trump’s tariff announcement last week. Here’s how last week stacks up to some of the worst days for the stock market in U.S. history.

Investors, businesses and consumers all seem terrified of how President Trump's tariffs could upend the global economy.