David Rosenberg's first day as a Wall Street economist was October 19, 1987, when stocks fell 22%. Rosenberg's main takeaway from Black Monday was learning to assess why a drawdown was happening.

David Rosenberg, Rosenberg Research founder and president, joins 'Money Movers' to discuss what the 'detox' period looks like for the economy, Rosenberg's GDP forecast, and much more. Trump says ...