For months, Tesla shareholders were tormented by Elon Musk’s role in the administration of President Donald Trump. But any relief brought by his formal government exit last week quickly turned to fear as the electric-vehicle maker’s chief executive traded barbs with his former boss.

Wall Street loves a catchy acronym, and the “TACO trade” has captured the mood, as investors and analysts attempt to make sense of the roller-coaster market action that has followed President Donald Trump’s sweeping tariff threats and subsequent walk-backs.

By Saeed Azhar, Kanchana Chakravarty and Sukriti Gupta NEW YORK (Reuters) - Wall Street's stock indexes ended lower on Thursday in choppy trade as a slump in Tesla shares offset news of progress in tariff talks between U.