Tesla shares fell 10% at the opening bell in New York on Thursday, extending their slide following the US election. Bloomberg reports that investors fear that a Democratic victory could complicate Elon Musk's plans to expand his business. The day before, the car manufacturer's shares lost 3.3%, and since the beginning of the year their value has decreased by about 23%. Shares of SpaceX, also managed by a businessman, were down 7.5% on Thursday morning.