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The overall trend of the US stock market overnight was extremely fragmented, representing a typical structural market. The late-session plunge does not indicate systemic market risk. The market showed clear divergence: the Dow Jones rose against the trend to hit a new closing high, the S&P 500 slightly declined, and the Nasdaq fell more significantly. The core reason is that funds are withdrawing from high-level tech growth sectors and shifting to traditional undervalued blue-chip sectors such as healthcare and materials. This late-session weakness was caused by multiple negative factors combined with profit-taking demands at high levels. After concentrated sentiment release, the market entered an adjustment phase. Key triggers for the plunge 📉 - Personnel changes at tech giants: Alphabet adjusted its AI core management team, with major changes in key personnel responsibilities. The market interpreted this as a major shift in the company's AI strategy. As a major index heavyweight, its stock price dropped sharply, directly dragging down the S&P 500 and Nasdaq late-session weakness, which was the most direct cause of the plunge. - Concentrated profit-taking on tech earnings: After earnings reports from several core tech companies, funds began to cash out at high levels. AMD met earnings expectations but profit margins and future guidance did not exceed extreme market expectations. Coupled with SpaceX's announcement to prioritize Nvidia chips, its stock plunged over 7%. Although SpaceX's fundamentals improved, the market worries about high AI capital expenditures and cash flow pressure, causing a sharp pullback in the stock and prompting the market to reassess AI sector investment returns. The storage sector also weakened; Western Digital's performance was flat, combined with previous excessive gains and continued decline in consumer storage business, further suppressing tech sector sentiment. - Fed's hawkish stance: Federal Reserve officials stated that US inflation remains high and the economy is resilient, with no conditions for monetary easing in the short term. This completely dispelled market rate cut expectations, significantly suppressing valuations of high-level growth stocks and amplifying late-session risk-off sentiment. Personal view: This is a normal structural adjustment, not a trend reversal ✅ From the overall market signals, this adjustment is just a valuation correction and sentiment realization for high-level tech stocks, not a mid-term market trend reversal. The Dow's new highs and continuous fund rotation into blue-chip sectors indicate that overall market bullish sentiment has not collapsed. At the same time, US Treasury yields and international crude oil prices remain stable, with no systemic risk release. This is merely a sector style rotation and internal AI fund optimization structural market. $SPCX $AMD $NVDA