The Nikkei 225 closed Tuesday at 65,856.43, up 0.50%, but the headline hides the real story: the index tumbled as much as 1.4% in the morning, briefly losing the 65,000 level, before afternoon dip-buying — helped by a rebound across regional Asian markets and firmer S&P 500 futures (+0.19% at 7,684.00 during Tokyo hours) — carried it back into the green. The TOPIX-tracking 1306 ETF finished +0.47% at 426.70. SoftBank Group (9984) was the emblem of the turnaround, reversing from morning lows to close +2.25% at 5,087 and contributing heavily to the afternoon bounce.
The early weakness was imported. The S&P 500 fell 0.28% to 7,652.86 overnight in a tech-led pullback, with caution running high ahead of Nvidia’s earnings, viewed globally as the key gauge of AI hardware demand. Tokyo’s chip complex spent most of the session under pressure before recovering: Tokyo Electron (8035) ended +0.47% at 55,410 and Advantest (6857) closed nearly flat at 34,450 (-0.14%). The yen stayed soft, with USD/JPY at 159.41 (+0.32%) at the Tokyo close.
Positioning: Defense Still On
Short selling accounted for 43.1% of TSE trading value Tuesday (34.0% under the price rule plus 9.1% unrestricted) on total turnover of JPY 7.71 trillion. That is an elevated, defensive reading in absolute terms — but it sits in the middle third of the last eight sessions’ 39.0%–45.9% range (average 41.6%), so shorts remain heavy without pressing to new extremes. The Nikkei Volatility Index rose 2.28 points to 30.41, the 84th percentile of the last 891 sessions. The options market is not treating this bounce as an all-clear.
Sectors and Movers
By TOPIX-17 ETF proxies (Nomura NEXT FUNDS closes, which can deviate slightly from official sector indices), 11 of 17 sectors advanced. Steel & Nonferrous led at +2.54% — a rebound in a group still down 4.6% over five sessions — followed by Machinery (+1.98%) and Financials ex-Banks (+1.59%). Pharmaceuticals (-1.10%), Autos & Transport Equipment (-0.92%) and Power & Gas (-0.42%) lagged.
The auto weakness stands out given the yen near 159: within our fixed 95-name large-cap universe, Nissan fell 3.05%, Honda 2.92% and Toyota 1.38%. TEPCO was the worst tracked large cap at -3.40% on 1.2x its 20-day average volume.
| Gainers | Move | Losers | Move |
|---|---|---|---|
| MS&AD (8725) | +2.94% | TEPCO (9501) | -3.40% |
| JR East (9020) | +2.49% | Nissan (7201) | -3.05% |
| Ajinomoto (2802) | +2.36% | Honda (7267) | -2.92% |
| SoftBank Group (9984) | +2.25% | Toyota (7203) | -1.38% |
| Nomura (8604) | +2.11% | Kawasaki Kisen (9107) | -1.27% |
Movers drawn from a fixed 95-name large-cap universe, not a full-market scan.
Rates, Yen and the BOJ
Market pricing puts roughly 80% odds on a rate hike at the Bank of Japan’s September 18 meeting, after July core CPI hit a four-month high and with the yen above 159 keeping import-inflation concerns alive. Monday’s MOF closes had the 2-year JGB at 1.685% (+0.3bp) and the 10-year at 2.887% (+0.5bp), while the super-long end eased slightly (30-year 4.036%, -0.6bp). Financials traded consistent with that pricing: MUFG +1.38%, Nomura +2.11%, MS&AD +2.94%.
Margin and Short-Positioning Detail
Monday’s JSF standardized-margin data (Tuesday’s are not yet published) showed loans for margin buying — leveraged long demand — at JPY 0.66 trillion against JPY 0.23 trillion of stock lending, i.e. shares borrowed for shorting. The single-name detail is telling: SoftBank Group’s margin-loan balance jumped 290,600 shares on Monday, so leveraged longs were building into today’s rebound, while Sony’s stock-lending balance rose 60,400 shares, a build in borrow on the short side. Separately, 545 of 1,161 loanable issues (47%) incurred gyaku-hibu premium charges Monday — an extra daily cost short sellers are paying, and a broad squeeze-pressure signal.
On the regulatory side, JPX published 966 large disclosed-short-position reports across 665 issues on Tuesday. These are lagged position filings, not today’s selling: Unitika (3103) tops the list at an aggregate 14.2% of shares outstanding, and the largest shifts versus prior reports were Future Innovation Group (4392, +2.37pp), Silicon Studio (3907, +1.91pp) and — a wrinkle worth noting — a 1.75pp rise in disclosed shorts on the Nikkei 225 Bear -2x ETF (1360), a position that effectively leans bullish on the index.
Weekly Flows
The latest JPX investor-type data cover the week of August 10–14 and are published with a lag — these are not today’s flows. In that week, foreign investors net sold JPY 0.38 trillion of TSE Prime equities and individuals net sold JPY 0.13 trillion. One caveat: MOF cross-border data for the same week, compiled on a different reporting basis, showed foreigners as net buyers of JPY 0.62 trillion of Japanese equities, so the foreign-flow picture is genuinely mixed and direction should be read with care. Meanwhile, margin buying balances (Tokyo plus Nagoya, as of August 21) rose JPY 0.28 trillion on the week to JPY 6.48 trillion against JPY 0.90 trillion of margin selling — the retail leverage gauge is still climbing.
What to Watch
- Nvidia earnings — Tuesday’s morning slide showed how sensitive Tokyo’s chip complex remains to the global AI-hardware read-through.
- BOJ September 18 pricing — with roughly 80% hike odds and USD/JPY at 159.41, watch the JGB front end (2-year at 1.685%) and whether further yen softness pushes pricing higher.
- Positioning persistence — a short-sell ratio holding in the low 40s alongside a Nikkei VI above 30 says defense is still on; a fade in both would confirm the dip-buyers.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.