Tesla stock was rising—barely—in early trading Tuesday as shares have suddenly gotten less volatile. Predicting the electric vehicle maker’s daily stock moves isn’t easy, but shares are likely to get a boost from potential changes to President Donald Trump’s car tariffs.

The drop-off in bookings could lead to empty store shelves this summer as retailers deem China-made goods too expensive to import.

Trump's erratic, and often confusing, rollout of tariffs has led to unprecedented market volatility and serious damage to investor trust in U.S. assets.