GM shares fall 8.7% as new tariffs and JPMorgan's lowered target raise cost concerns.

General Motors (GM) shares have dropped 8.7% to $46.40, influenced by new 25% tariffs on imported vehicles and parts, which could raise costs by $3,000 to $8,000 per vehicle. JPMorgan lowered GM's price target due to increased earnings risk. The tariffs affect key models and GM's electric vehicle strategy, potentially squeezing margins and reducing demand.