Tesla shares gained nearly 12% Monday, marking their best day of 2025, according to CNBC. The surge followed a steep nine-week slide fueled by backlash over CEO Elon Musk’s political activism, which has triggered global boycotts and vandalism at Tesla sites. The EV giant's stock was the top performer in the S&P 500 following Trump’s election win, though it remains well below its peak from December.