Derived from the Latin term meaning “according to value,” an ad valorem tariff is a tax imposed on goods based on their value rather than their quantity or weight. This type of tariff is commonly used ...

Editor’s note, August 7, 10:30 am ET: On August 7, Trump’s tariffs went into effect for about 90 countries. The story below was originally published on April 2. Since President Donald Trump announced ...

Countries have long imposed tariffs as a means of protecting and shoring up domestic industries. However, history and research have shown that the economic effects often fail to live up to the hype.

The Supreme Court ruled Friday that President Trump overstepped his authority in ordering tariffs on nearly everything the U.S. imports. Here's some economic context to understand that decision.

The decision is a major setback for President Trump, who responded by imposing a 10 percent global tariff after lashing out at the justices who ruled against him. Trade deals his administration has ...