10 things you need to know before the opening bell

Nigel FarageBrexit Party leader Nigel Farage gestures as he arrives to vote in the European elections at a polling station in Biggin Hill, Britain.Reuters/Hannah McKay

Here is what you need to know.

  1. "Trade war! Trade War! Not afraid of the outrageous challenge! Not afraid of the outrageous challenge! A trade war is happening over the Pacific Ocean!" the song chants. "If the perpetrator wants to fight, we will beat him out of his wits."
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