New risk to rising prices

Stock futures tumbled early Monday to kick off a new trading month, as investors weighed new U.S. tariffs on goods from key trade partners and their potential impact on the economy and corporate profits.

Futures tied to the Dow Jones Industrial Average slid 546 points, or 1.22%. S&P 500 futures dropped 1.4%, while Nasdaq-100 futures lost 1.7%.

President Donald Trump on Saturday slapped a 25% tariff on goods from Mexico and Canada. He also placed a 10% levy on imports from China. The U.S. does about $1.6 trillion in business with the three countries.