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Dow, S&P 500, Nasdaq plunge amid U.S., China Trade War

Global stocks are tumbling as China lets the Yuan weaken past 7 per dollar. Alicia Levine, BNY Mellon Investment Management Chief Strategist and JJ Kinahan, TD Ameritrade Chief Market Strategist, discuss that and what else is moving the markets around the opening bell with Yahoo Finance's Alexis Christoforous and Brian Sozzi.