General Motors stock rose more than 15% on Tuesday after the company reported third-quarter results that beat Wall Street estimates senseless on both revenue and profit —even as net income dropped hard vs. last year. What’s behind investors' enthusiasm? News that the company can, apparently, keep trucking through tariffs and the slings and arrows of the EV market. GM’s all-electric efforts weighed on profits, and tariffs brought down margins in their all-important North American market—GM’s white-hot prof ...