Investors have been betting that Tesla's lead in self-driving technology – one of the most powerful trends in the auto market – will help it shape the future of transportation. However, the company's popular driver-assistance feature, Autopilot, has come under increasing regulatory scrutiny this week, with the National Highway Traffic Safety and Administration noting that it was looking into 11 cases of collisions of Tesla vehicles with parked vehicles of first responders. Moreover, two U.S. Senators have asked the U.S. Federal Trade Commission to investigate if Tesla's naming of its driver-assistance systems "Autopilot" and "Full Self-Driving" were deceptive. Tesla stock declined by about 4% over the last three trading days, partly due to the news. So what do the recent developments mean for Tesla's self-driving ambitions?