Jeremy Bowman | The Motley FoolTesla tumbles below $1 trillion valueFor the first time since November, Tesla is worth less than $1 trillion. The firm's stock tumbled 8% after new figures showed sales have slumped in Europe.After soaring following the election, Tesla (NASDAQ: TSLA) stock ran into a wall in February as a number of news items, macro challenges and CEO Elon Musk's involvement in the Department of Government Efficiency (DOGE) initiative all seemed to contribute to a sharp pullback in the stock.When the dust settled for February, the stock...