A Chip Scare the Broader Market Refused to Join
Friday’s session looked far worse at midday than it did at the close. The Nikkei 225 fell more than 1,000 points intraday before clawing back nearly all of it, finishing down just 76.55 points, or 0.12%, at 65,606.71. The TOPIX proxy (1306 ETF) actually gained 0.33%, and 11 of 17 sectors advanced on the TOPIX-17 ETF measures — a clean signal that the damage was concentrated in a handful of high-priced technology components rather than spread across the market.
The pressure was concentrated in chip-related names, hit by overnight weakness in US technology stocks and softer quarterly earnings forecasts at home. Lasertec (6920) fell 13.55%, Fujifilm (4901) dropped 16.55% on 6.1 times its 20-day average volume, and Disco (6146) and SCREEN (7735) lost 5.11% and 4.42% — the precise company-level triggers behind the two biggest decliners were not immediately clear, but both moves fit the broader sector-wide pressure. The larger equipment names held up better — Tokyo Electron (8035) eased 1.50% and Advantest (6857) 2.25% — while SoftBank Group (9984) shed 2.51% as investors weighed the capital commitments behind its AI strategy. The tone fits a broader shift visible globally: capital rotating toward companies with direct data-center exposure and proven earnings, away from the speculative end of the AI trade.
The other market-defining move was the yen. USD/JPY closed at 158.45, up 0.54% on the day, meaning the currency has now surrendered roughly half the gains achieved after the joint US-Japan intervention on July 31. That backdrop sharpens the relevance of Governor Ueda’s comments signaling readiness to continue normalizing policy after June’s hike to 1.0%, with speculation building around a September or October move.
Winners: Games, Pharma, Steel
Away from the chip complex, the tape was constructive. Among the 95 tracked large caps, the gainers list was dominated by games and consumer names: Bandai Namco (7832) surged 10.50% on 3.1 times average volume, Nintendo (7974) added 5.26%, Capcom (9697) 5.25%, and Shiseido (4911) 6.72%. IHI (7013) rose 4.02%.
On the sector ETF proxies, Pharmaceuticals led with +2.81% (now +3.9% over five sessions), followed by Steel & Nonferrous at +2.25% (+7.8% on the week) and Energy Resources at +2.13%. Construction & Materials was the clear laggard at -1.86%. Elsewhere in the large caps, Sony (6758) gained 2.62%, Fast Retailing (9983) added 0.53%, Toyota (7203) slipped 0.12% and MUFG (8306) eased 0.28%.
Positioning: Short Selling Eases Off Recent Highs
The TSE short-selling ratio — our daily positioning signature — came in at 37.1% of total trading value on Friday (29.2% price-rule restricted plus 7.9% unrestricted), on total turnover of JPY 11.52 trillion. That sits in the lower third of the last five sessions’ 37.1%–45.4% range, against a 41.9% average. Plainly: after a stretch of heavily defensive positioning, short-side aggression eased even on a down day for the index, which is consistent with the intraday recovery.
The squeeze-cost signal remains broad, however. As of Thursday’s JSF data, 500 of 1,113 loanable issues carried a gyaku-hibu premium — an extra daily charge short sellers must pay — covering roughly 45% of the loanable universe. The Nikkei Volatility Index ticked up 0.10 to 29.88, its 83rd percentile over the past 880 sessions, so hedging demand remains elevated even as outright shorting cooled.
In Thursday’s standardized margin data (JSF, one day lagged), a few large-cap shifts stand out: Toyota’s stock-lending balance — shares borrowed for shorting — jumped 69,400 shares while leveraged long positions fell, and Fast Retailing saw a similar rotation (lending +34,200, margin loans -39,800). SoftBank Group went the other way, with margin buying up 103,300 shares into the weakness — leveraged longs adding to a falling name. Among the large disclosed short positions published Friday (regulatory filings reported with a lag, not today’s selling), the biggest change was Casio Computer (6952), where aggregate disclosed shorts fell 1.86 percentage points versus prior reports.
Weekly Flows
For the week of July 27–31 (JPX data, published with a lag — these are not Friday’s flows), foreign investors were net buyers of TSE Prime equities to the tune of JPY 0.37 trillion, while individuals net sold JPY 0.49 trillion. One caveat: MOF’s cross-border securities data for the overlapping July 26–August 1 week, compiled on a different reporting basis, showed foreigners as net sellers of JPY 0.39 trillion — the two series disagree on direction this week, so treat the foreign-flow signal as mixed rather than firmly positive. The broader retail leverage gauge (Tokyo+Nagoya margin balances as of July 31) showed margin buying at JPY 6.20 trillion, down 0.27 trillion on the week, against margin selling of JPY 0.73 trillion.
Rates and the Macro Backdrop
JGB yields eased across the curve in Thursday’s MOF data: the 10-year at 2.773% (-4.0bp), the 2-year at 1.565%, and the 30-year at 3.919% (-4.7bp). The bid in bonds sits somewhat awkwardly against Ueda’s normalization signaling, and the yen’s slide back toward 158.45 keeps the policy debate live.
What to Watch
- The yen versus the intervention line. At 158.45, half the post–July 31 intervention gains are gone. Further slippage raises the odds of renewed official action — and stiffens the case for a September/October BOJ hike.
- Chip-equipment follow-through. Whether Friday’s outsized declines in Lasertec and Fujifilm — the latter on six times average volume — stay contained, or start dragging Tokyo Electron and Advantest harder, will decide if the Nikkei’s resilience holds.
- The short-sell ratio. At 37.1%, positioning has stepped back from the defensive extreme of recent sessions. A push back toward the mid-40s would signal conviction returning to the bear side; holding here supports the dip-buying pattern.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.