https://www.cnbc.com/2018/03/20/tesla-shares-drop-into-bear-market-territory-as-model-3-production-worries-persist.html

Tesla shares are sinking into bear market territory as investors worry the company may not hit a key production milestone.

The stock was recently trading at around $310, which is more than 20 percent below its all-time high of $389.61, set in September 2017. To be in a bear market territory, a sign of very negative investor sentiment, the shares would need to close at $311.69 or lower.