Rivian Slips After Walking Back Full-Year Profit Guidance (1)

Rivian Automotive Inc. shares fell after the electric-vehicle maker backed away from a key financial goal and warned of mounting losses, highlighting the pressure it’s facing from President Donald Trump’s tariffs and changes to US environmental rules.

The company now expects to break even on a gross profit basis this year, softening its prior forecast for a modest profit. Higher costs from newly imposed tariffs and the loss of revenue from sales of regulatory credits have put that goal out of reach.

“While we believe deeply in the long-term value drivers of our business, the policy environment continues to ...