Tesla stock was rising—barely— in premarket 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.

Elon Musk’s vocal and financial backing of Donald Trump’s presidential campaign led many observers to predict significant benefits for the billionaire and his companies under a second Trump administration.

Elon Musk's foray into politics has stoked protests and fears of damage to the Tesla brand. Here's how Musk has fared early in Trump's second term.