Tesla shares fall after robotaxi event

Tesla shares fell on Friday after the company's robotaxi event that left investors less than impressed.CEO Elon Musk introduced the world to two versions of Tesla’s "robotaxi" on Thursday evening during an event dubbed "We, Robot": the "Cybercab" sedan and a futuristic-looking "Robovan."Tesla aims to begin "Cybercab" production before 2027, Musk said, noting he "tend[s] to be a little optimistic with timeframes." The vehicle, slated to cost less than $30,000, has no steering wheel or pedal