巴菲特的最后一手棋

Market Overview - On February 17, US stocks experienced volatility under the backdrop of "AI narrative divergence," with the S&P 500 index briefly falling nearly 1% before closing up 0.1% [1] - The software sector remains under pressure, with the iShares expanded technology software industry ETF down 23.23% year-to-date, as investors worry that AI may disrupt existing software business models [1][5] - Major tech companies like Microsoft and Meta face scrutiny over high capital expenditures, yet the market still recognizes their leading positions in AI infrastructure development [1] Berkshire Hathaway's 13F Filing - Berkshire Hathaway disclosed its latest 13F filing to the SEC, showing continued adjustments in its tech holdings during Warren Buffett's final quarter as CEO [1][7] - Berkshire reduced its stake in Apple by over 10.29 million shares, a 4.32% decrease from the previous quarter, resulting in a market value reduction of approximately $2.8 billion [7][8] - This marks the third consecutive quarter of Apple share reductions, although it remains Berkshire's largest holding [7] Other Holdings Adjustments - Berkshire also sold nearly 50.8 million shares of Bank of America, reducing its stake by 8.94%, with the holding now accounting for 10.38% of its portfolio [7][8] - Amazon's share in Berkshire's portfolio dropped significantly from 0.82% to 0.19%, a decrease of over 77.2% in share quantity [8] - The only new position taken by Berkshire in the fourth quarter was in The New York Times, acquiring 5.0657 million shares valued at over $350 million [10] Sector Performance - The Dow Jones Industrial Average rose 0.07% to 49,533.19 points, while the S&P 500 and Nasdaq increased by 0.1% and 0.14%, respectively [3] - Apple shares rose over 3%, and Nike increased by more than 2%, leading the Dow [5] - The semiconductor sector showed mixed results, with the Philadelphia Semiconductor Index down 0.02% [5] Economic Data - ADP Research reported that the average weekly new job additions in the US increased to 10,250, marking the third consecutive week of growth [5]