A new batch of tariffs from President Donald Trump on Tuesday again sent some investors scrambling, as the blue chip Dow Jones Industrial Average stock index tumbled further as the market shudders at economic policy uncertainty.

The S&P 500 index fell more than 10% from its record closing peak after U.S. President Donald Trump on Tuesday announced fresh tariffs on Canada, adding to investor unease that his trade policies could trigger an economic slowdown.

President Trump is doubling down on his widespread tariffs threats despite a stock market downturn that has helped fuel anxiety the nation could slide into a recession. Trump escalated the tit for tat with Canada on Tuesday when he said his administration would increase planned steel and aluminum tariffs in response to an electricity