道指开盘跌0.1%，标普500涨0.1%，纳指涨0.3%

Group 1 - Palantir's stock increased by 11.4% following a strong earnings report and guidance that exceeded market expectations [1] - Teradyne, a semiconductor testing company, saw a 6.3% rise due to robust Q4 performance [1] - Palladyne AI's shares rose by 10.9% after signing a contract with a major U.S. defense contractor [1] Group 2 - PayPal's stock dropped by 17.8% as Q4 profits fell short of expectations and a new CEO was appointed [1] - Merck's shares declined by 1.7% after providing a sales guidance for 2026 that did not meet market expectations [1]