President Donald Trump's threat to impose a 50% tariff on all goods coming into the United States from the European Union starting next weekend was the latest zag after several zigs on trade policy that have befuddled financial markets,

The President of the United States, Donald Trump, threatened the European Union on Friday with a significant increase in tariffs on European goods. He stated that the current negotiations "are going nowhere.

The Friday announcement from the president came after a week of ups and downs, including Moody's downgrading the nation's credit rating.