Tokyo Stocks Plunge Over 4100 Points Intraday, Third Largest Drop Ever as AI Rally Hits the Brakes
- Nikkei 225 fell more than 4,100 points intraday on July 17, the third-largest drop on record
- Selling concentrated in AI and semiconductor names that led the year-long rally
- The prior session already saw a 2,200-point slide, signaling systematic de-risking
- Iran tensions and record-high inflation expectations pressure rate repricing
- TSMC posted record earnings the same day, highlighting a price-fundamentals divergence
Tokyo's stock market threw its most crowded trade off the train on July 17. The Nikkei 225 plunged more than 4,100 points intraday, a drop exceeded only by August 5, 2024 (4,451 points) and the day after Black Monday in 1987 (3,836 points). Selling concentrated in the AI and semiconductor names that powered the index to record highs, and it followed a 2,200-point slide the previous day — two sessions of systematic de-risking, not a one-off panic. Kioxia amplified the fear, hitting limit-down after a $250-million-scale US patent verdict. The macro backdrop did the rest: Hormuz shipping risk, blockade reports around the Bab el-Mandeb alternative route, and a Bank of Japan survey showing over 90% of respondents expect prices to rise within a year — a record. Rising inflation expectations mean rate repricing, and the most expensive stocks get hit first. Yet fundamentals looked solid: TSMC posted record quarterly revenue and profit the very same day. Three scenarios from here: a technical correction that heals in weeks, a valuation reset if rates climb, or a trend reversal if Middle East escalation sends oil soaring. Watch shipping lanes, BOJ rhetoric, and US tech earnings. Discipline beats bottom-calling on days like this.