Group 1 - The relationship between Elon Musk and Donald Trump has deteriorated significantly, with both parties engaging in public disputes over social media [1][3] - Trump expressed disappointment in Musk, stating their previously good relationship may not continue, while Musk accused Trump of being ungrateful for his support during the elections [3] - Musk's comments on Trump's policies, including tariffs and economic impacts, have further escalated tensions between the two [3][4] Group 2 - Following the public feud, Tesla's stock price plummeted over 14%, resulting in a market value loss of approximately $152.5 billion, dropping below a $1 trillion valuation [4] - The overall U.S. stock market experienced a decline, with major indices falling, influenced by Tesla's poor performance [4]