纳指低开0.16%，AMD绩后大跌近12%，超微电脑涨近9%

Group 1 - The US ADP employment numbers for January fell short of expectations, indicating a continued slowdown in the labor market [1] - The major US stock indices showed mixed performance at the market open, with the Nasdaq down 0.16%, the S&P 500 up 0.08%, and the Dow Jones up 0.4% [1] Group 2 - AMD experienced a significant drop of nearly 12%, with expectations of a 5% decline in Q1 revenue to $9.8 billion, pending performance improvements in the second half of the year with the MI450 series [1] - Novo Nordisk's stock fell by 4.5%, as the company anticipates a 5%-13% decrease in sales and operating profit this year due to unprecedented pricing pressures [1] - Super Micro Computer's stock rose nearly 9%, as both Q2 performance and guidance exceeded expectations, driven by strong demand for AI data center equipment [1] - Synaptics saw a surge of over 51%, while Texas Instruments fell more than 2% following the announcement of a $7.5 billion acquisition of Synaptics [1]