【美股盘前】芯片股普跌 英伟达跌超1%；Meta AI眼镜曝隐私风险；营收超预期 迈威尔科技涨超12%；美国非农数据今晚发布

Group 1 - Dow futures fell by 0.37%, S&P 500 futures dropped by 0.46%, and Nasdaq futures decreased by 0.57% [1] - Popular Chinese stocks saw a pre-market increase, with JD.com up 4.63%, Baidu up 2.57%, Ctrip up 2.48%, and NetEase up 5.36% [1] - Chip stocks experienced a pre-market decline, with Nvidia down 1.4%, AMD down 0.82%, and Intel down 0.74% [1] Group 2 - Samsara reported Q4 earnings that exceeded analyst expectations, with revenue of $444.3 million against a forecast of $422.26 million, and adjusted EPS of $0.18 compared to an expected $0.13, leading to an 8.86% stock increase [1] - Pfizer's weight loss drug "Saxenda" received approval in China for long-term weight management in overweight/obese adults, resulting in a 0.3% stock increase for Pfizer [1] Group 3 - Dow Chemical announced a price increase of €100 per ton for its polyether polyol products in the EMEAI region, citing rising energy, raw material, and logistics costs due to regional instability, leading to a 2.02% stock increase [2] - Meta's AI glasses raised privacy concerns as videos are sent to data annotators in Kenya for review, with Meta stating that faces will be blurred, resulting in a 0.39% stock decrease [2] Group 4 - Marvell Technology reported Q4 earnings for FY2026 with a record revenue of $2.22 billion, a year-over-year increase of over 20%, and adjusted EPS of $0.80, slightly above expectations, leading to a 12.01% stock increase [3]