Hyundai Motor Co. and affiliate Kia Corp. could face as much as $5 billion in additional costs this year under a new trade agreement between the US and South Korea that imposes a 15% import tariff on automobiles.

Seoul (Reuters) -Shares of South Korean automakers Hyundai Motor and Kia Corp fell on Thursday after U.S. President Donald Trump said the U.S. will charge a 15% tariff on imports from South Korea, including autos,

The agreement comes after other American allies, like Japan, clinched their own deals, partly to moderate President Trump’s tariff threats.