Selloff offers an early glimpse of Wall Street’s response to trade wars. Follow along for live updates on stocks and markets, including the Dow Jones Industrial Average, S&P 500 and Nasdaq Composite.

U.S. tariffs on Canadian and Mexican energy will take effect Tuesday, but the Goldman Sachs commodities team believes the cost has already been priced into the global oil market. The analysts said January markets were already pricing in tariffs and predicted Canadian oil will still fetch prices "far above production costs.