Tesla's (NASDAQ: TSLA) stock has come down considerably since the year began. Shares are down roughly 30% in value so far this year, with the stock's price-to-sales ratio falling from over 15 to just 9.

What Happened? Shares of electric vehicle pioneer Tesla (NASDAQ:TSLA) jumped 10.4% in the afternoon session after the National Highway Traffic Safety Administration (NHTSA), rolled out new rules to speed up the launch of home-built self-driving cars.