纳指跌超1%，半导体指数跌超3%，中概指数跌超3%，富时A50夜期跌幅扩大

Market Performance - The S&P 500 index fell over 0.9%, while the Dow Jones decreased by 210 points, a decline of 0.5%. The Nasdaq dropped by 245 points, approximately 1.3% [1] - The Nasdaq 100 index saw its decline widen to 1%, with significant drops in key stocks such as Regeneron Pharmaceuticals down over 19.1%, Marvell Technology down 7.5%, and Nvidia down 4.3% [1] - The Philadelphia Semiconductor Index fell over 3.6%, and the Biotechnology Index decreased by 2.8% [1] International Indices - The Nasdaq Golden Dragon China Index dropped over 3.6%, reaching a new daily low [2] - The FTSE A50 night futures declined, with an overall drop exceeding 0.9% during the period [3] Bond and Commodity Markets - The yield on the 10-year U.S. Treasury bond fell by 2.5 basis points, approaching 4.39% [3] - Spot gold maintained a decline of approximately 0.9%, while the U.S. dollar index showed an increase of over 0.1% [4] Stock Performance - Notable stock declines included Regeneron Pharmaceuticals at $489.79, down $115.6, and Nvidia at $133.28, down $5.91 [7] - Other significant declines included Arm Holdings down $6.44, Marvell Technology down $4.73, and ASML Holding down $20.43 [7]