The pendulum-like nature of Trump’s trade policies, economists say, almost certainly means higher grocery store prices.

Tariffs have historically triggered market volatility. When the Trump administration announced tariffs on China, markets dropped sharply before making a near-total recovery that same day. Investors should focus on long-term goals and consult their financial advisors before making portfolio changes.

Worsening relations with three of the United States’ biggest trading partners dominated a Senate hearing for the would-be U.S. ambassadors to Canada, Mexico and Japan.