https://www.cnbc.com/2018/03/27/tesla-shares-drop-to-the-lowest-since-may-on-fatal-crash-investigation-bearish-analyst-note.html >Tesla shares fell after the National Transportation Safety Board said it sent investigators to look into a fatal car crash last week in California, according to a post on social media. >A negative analyst call from Citigroup also weighed on the stock, which has been under pressure this past one month.