Tesla stock fell almost 7% in premarket trading 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,

Shares in Tesla tanked by as much as 7.6% in pre-market trade Monday after its CEO Elon Musk said he is forming a new American political party, provoking an irate response from US President Donald Trump.

Tesla shares fell over 3% on Monday, under pressure from investor concerns about the focus of boss Elon Musk after he announced he would form a new U.S. political party, marking a new escalation in his feud with President Donald Trump.