According to The Kobeissi Letter, Warren Buffett has officially announced his resignation as CEO of Berkshire Hathaway after serving for 55 years, marking the end of the longest CEO tenure among S&P 500 companies (source: The Kobeissi Letter, May 3, 2025). This leadership transition is expected to influence Berkshire Hathaway’s stock volatility and may trigger short-term shifts in investor sentiment across blue-chip equities, as market participants reassess succession strategies and long-term value projections (source: The Kobeissi Letter). Traders should monitor Berkshire Hathaway's price action and related S&P 500 movements closely for potential opportunities arising from this leadership change.