What Happened? Shares of electric vehicle pioneer Tesla (NASDAQ:TSLA) fell 7.4% in the morning session after CEO Elon Musk announced over the weekend his intention to form a new political party, the "America Party.

William Blair lowered its rating on Tesla stock from outperform to market perform today. The Wall Street Journal recently reported that Tesla is losing market share in China, and President Trump threatened new tariffs.

Tesla stock price fell Monday after Musk said he's formed the America Party, the latest development in the billionaire's feud with President Trump.

The Nasdaq composite inched fractionally higher in Tuesday's session. The S&P 500 shed less than 0.1%. Small caps led the market, with the Russell 2000 index climbing nearly 0.7%. The Russell recouped about half of Monday's drop of nearly 1.6%.

Stocks were flashing this warning signal before tariff jitters drove Dow down more than 400 points. Tesla and Apple don’t belong in the ‘Magnificent Seven’ anymore. These two hot tech stocks should replace them.