As Elon Musk's Tesla Inc. shares surged on Thursday following President Donald Trump's tariff announcements, the company's market cap grew significantly compared to its US competitors General Motors Co. and Ford Motor Co. Despite Tesla's smaller car sales volume, its stock rise overshadowed the negative impact of tariffs on the auto sector. Tesla’s stock surge caused an increase in the overall auto companies’ index on Thursday, while its rivals faced declines due to the potential impact of tariffs on imported vehicles. Notably, Tesla is less affected by these tariffs as it manufactures its cars domestically. The market reactions reflect Tesla's market dominance despite its lower sales volume compared to competitors. Additionally, other winners on Thursday included used car sellers such as Carmax Inc., Hertz Global Holdings Inc., and Avis Budget Group Inc., who stand to benefit from potential price increases in new cars.