Tesla has lost its position as the world's top electric vehicle maker to China's BYD, which sold 2.26 million vehicles in 2025 compared to Tesla's 1.64 million. Tesla's sales declined for the second consecutive year, falling short of analyst expectations for the fourth quarter. Factors cited include customer dissatisfaction with Elon Musk's political stances, increased overseas competition, and the expiration of a $7,500 tax credit. Despite these challenges, investors remain optimistic about Tesla's future ventures in robotaxis and humanoid robots, with its stock showing resilience.