Shares of automakers and megacap tech stocks bore the brunt of a wider equity pullback on Monday after U.S. President Donald Trump ordered sweeping tariffs against Mexico, Canada and China, sparking fears of a global trade war that could hit growth.

Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures and Mexico said it would soon unveil its response.

Donald Trump hit Canada, Mexico and China with steep tariffs on Saturday, and oil and gas groups are relying more heavily on carbon offsets to reach climate targets. Plus, EU governments are exploring ways to include the UK and Norway in a “coalition of the willing” dedicated to ramping up the continent’s defence.