Tesla shares plunge 14%, head for worst day in five years. Since peaking at $479.86 on Dec. 17, Tesla shares have lost over 50% of their value, wiping out over $800 billion in market cap.

1. Homepage
2. Technology
3. Tesla shares plunge 14%, head for worst day in five years. Since peaking at $479.86 on Dec. 17, Tesla shares have lost over 50% of their value, wiping out over $800 billion in market cap.