Tesla’s stock was trading about 7 percent lower Monday morning, after CEO Elon Musk said over the weekend he’s creating a new political party amid his escalating feud with President Donald Trump. Musk announced on Saturday that he had started the “America Party,

Tesla stock fell as much as 8% on Monday after Musk announced a new political party.Tesla investors are frustrated with his political involvement, wrote analyst Dan Ives.Musk's feud with Trump makes investors worry about Tesla's future,

Mr. Musk’s involvement in politics and his financial support for the president’s campaign was once seen by investors as a benefit to Tesla, fueling a steep rise in company shares after the election last year. That association has now turned into a liability. Tesla shares are down 40 percent from their peak in December.