Group 1 - Pershing Square Capital took a new stake of 2,673,569 shares in Meta Platforms in the fourth quarter, marking it as the fifth largest position in the fund [1][3] - The fund exited its position in Chipotle Mexican Grill during the same quarter [1] - Ackman increased the fund's stake in Amazon, which is now the third largest position, while decreasing exposure to Alphabet shares for the second consecutive quarter [2][3] Group 2 - The investment presentation emphasized that Meta's current share price does not reflect its long-term upside potential from AI, suggesting a deeply discounted valuation [4] - Meta is recognized as a leader in the digital advertising space and a significant beneficiary of AI integration, supported by its 3.5 billion daily active users and a growing user base [5] - The experienced leadership team and favorable stock multiples were highlighted as additional reasons for a bullish outlook on Meta [5]

截至收盘，沪指报4126.09点，跌0.31%；深证成指报14248.60点，涨0.56%；创指报3349.14点，涨0.82%。盘面上，互联网 电商、小红书概念、拼多多概念涨幅居前；能源金属、保险、银行板块跌幅居前。 板块方面，AI应用概念连续爆发，二十余只成分股涨停，利欧股份9天6板；油气股表现活跃，科力股份、通源石油涨超 10%；贵金属板块反复活跃，湖南白银涨停；下跌方面，银行板块持续下挫，北京银行、浦发银行领跌；军工板块午后走弱， 中国卫通、中天火箭跌停。总体来看，两市个股涨多跌少，上涨个股超2700只。 市场早盘震荡走强，午后跳水快速回落，三大股指涨跌不一。 ...

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