Now they have a trade war problem to worry about again. Stocks fell Friday after President Donald Trump brought the trade war back to the forefront with threats of massive tariffs against America’s most valuable company and one of its most important trading partners.

Stocks dropped on Friday on renewed fears of an escalating trade war after Donald Trump threatened Apple and the EU with tariffs.

The president escalated his trade war once again, threatening Apple and Europe and sending the markets into a tailspin.

Donald Trump has lashed out at the European Union, claiming Washington's attempts to thrash a trade deal with the 27-strong bloc are "going nowhere". As a consequence, the US President is now threatening on social media to slap "a straight 50% Tariff on the European Union ".

Tesla's stock took a dive into the red, amid worries that Trump's escalation of the trade war with the EU will further hurt the EV giant's sales in Europe. The stock was up more than 1% before Trump's threat of a 50% tariff on EU imports,

Trump's surprise US-China tariff rollback triggered a powerful relief rally, with the Nasdaq gaining its best week since January. Click here for a detailed analysis.

The unpredictability of Trump’s tariff policy on Mexico earlier this year has already cost cattle ranchers millions of dollars in profit losses.

Why is Porsche’s stock down 21% so far this year, while Ferrari’s is up? Because 61% of the cars Porsche delivered in the first quarter were sport-utility vehicles, not sports cars. It is a trend that

Australian exporters are upbeat on their business outlook in China as U.S. tariffs could enhance their competitive edge in Chinese markets, a top central bank official said on Thursday.

Trump has responded to threats of digital services taxes with threats of more tariffs, arguing that "only America should be allowed to tax American firms," Reuters reported. In February, Trump issued a memo calling for research into the best responsive measures to counter threats of digital service taxes, including threatening more tariffs.