All Four Major U.S. Indexes Fall
U.S. stocks closed lower across the board on October 30, as market concerns over massive artificial intelligence capital expenditures remained unresolved and selling pressure emerged in semiconductors and technology stocks. The Nasdaq fell 747.72 points to close at 25437, down 2.86%, posting its largest single-day drop since June; the S&P 500 fell 140.32 points to close at 7580.07, down 1.82%, breaking below its 100-day moving average; the Dow Jones fell 572.25 points to close at 51770.31, down 1.09%; the PHLX Semiconductor Index fell 829.4 points to close at 10688.8, down 7.2%.
Tech Giants and Chip Stocks Collapse
The five tech giants all closed lower, with Meta down 1.53%, Apple down 1.23%, Alphabet down 1.4%, Microsoft down 1.55%, and Amazon down 1.41%. Amazon's third-quarter revenue and profit missed expectations, free cash flow over the past 12 months was negative US$424 hundred million, and it maintained its 2026 capital expenditure forecast of about US$2200 hundred million. U.S. officials also determined that Huang Le, a Chinese executive of a Singapore data center operator in close contact with Nvidia CEO Jensen Huang, was suspected of collecting intelligence for Beijing, and Jensen Huang responded that it was normal business contact. Semiconductors fell sharply, with Intel plunging nearly 29% on weak guidance, its largest single-day drop in over 40 years; AMD fell 10.88%, Qualcomm fell 11.12%, Applied Materials fell 7.49%, Broadcom fell 5.48%, and Nvidia fell 4.22%.
Memory Stocks and Crypto Weaken Together
Memory stocks were sold off together, with Micron down 5.3%, Western Digital down 7.41%, SanDisk down 13.47%, Seagate down 7.98%, and SK Hynix ADR down 7.95%, while the DRAM ETF fell about 20% cumulatively in October. Binance, the world's largest cryptocurrency exchange, was hacked, with affected assets estimated at US$63 hundred million, and Coinbase plunged nearly 11%. Funds rotated to defensive groups, with Walmart and Coca-Cola up over 1%, while Chevron and Exxon Mobil both hit record highs on better-than-expected earnings.
Taiwan Stocks Face Test at 45000 Points
TAIFEX night session fell 867 points, and TSMC futures fell 87 after hours, signaling heavy opening pressure for Taiwan stocks on November 2. Taiwan's Weighted Index closed at 45211.83 on October 30, down 1156.5 points or 2.49%, with turnover of 8777.3億元. The three major institutional investors together sold a net 1402.2億元, including foreign investors selling a net 1124.7億元 and dealers selling a net 513.7億元, with only investment trusts buying a net 236.2億元. Foreign investors' net open short positions reached 92241 contracts, up 2719 contracts, retail net long positions were 10372 contracts, and margin financing fell 104億元. Whether the short-term 45000-point整数 level can hold, and whether TSMC, AI servers, semiconductors and memory groups can stop falling, will be the key focus.