10 things you need to know before the opening bell (SPY, SPX, QQQ, DIA, KO, CVS, BA, HA)

Here is what you need to know. Gary Cohn resigns as Trump's top economic adviser. Cohn's decision to resign comes as President Donald Trump forges ahead with his plan to impose tariffs on aluminum and steel imports. Stock markets around the world are sliding. The Dow Jones industrial average is set to open lower by 350 points, or about 1.4%. Australia's ASX (-1.07%) saw the biggest overnight loss, and France's CAC (-0.49%) trails in Europe. The US may ramp up restrictions on...