In This Story F +1.47% TSLA +1.40% MS -0.16% INTC +2.49% NVDA -5.68% U.S. stocks changed direction and erased early gains after the ISM manufacturing index came in lower than expected at 50.3, as new orders contracted and the price measure surged. Investors are also cautious ahead of planned tariffs on Mexico and Canada scheduled to come into effect on Tuesday. Suggested Reading Walmart CEO says sky-high food prices are causing shoppers 'frustration and pain.' Tariffs could make it worse