Why did Tesla stock plummet today?

cemagraphics/iStock via Getty Images Tesla (NASDAQ:TSLA) fell 12.18% on a harsh day for the electric vehicle sector as a whole and with all the major stock indexes hit hard. Investors pushed Tesla (TSLA) to its lowest level in eight weeks as they weighed the impact of Elon Musk buying Twitter. While TSLA would have to fall another 40% for Musk to see a margin call on his pledged shares used to help finance the Twitter purchase, some traders see an overhang with Tesla more closely tied to potential geopolitical battles over the social media site.