Markets on Wall Street and in Europe declined rapidly early Friday morning after President Donald Trump posted a pair of tariff threats on social media, one aimed at Apple and the other at the European Union.

Wall Street's main indexes fell on Friday after U.S. President Donald Trump recommended 50% tariffs on the European Union, while Apple slid after he warned the company would have to pay tariffs if iPhones were not made in the United States.

American stock markets experienced a decline on Friday. This downturn resulted in a weekly loss. Donald Trump's proposal of 50% tariffs on European products triggered this fall. Technology and communication sectors faced significant losses.