Tokyo snapped a four-session losing streak on Friday, but the rebound stood on very few legs. The Nikkei 225 climbed 806.46 points, or 1.26%, to close at 65,020.94, reclaiming the 65,000 threshold — while the broader market barely participated: the TOPIX-tracking 1306 ETF added just 0.07% to 427.50. That gap is the day’s defining story. A handful of index heavyweights, led by an 11.78% surge in SoftBank Group, did nearly all the work, riding an overnight Wall Street tech rally (S&P 500 +1.06% to 7,747.71) and reduced odds of a near-term Fed hike after dovish remarks from Governor Waller. Meanwhile a strengthening yen — USD/JPY was trading around 156.3 on September 4, down about 1.6% on the day — weighed on exporters and kept the average stock in check.
A Narrow Rally by the Numbers
| Name | Close | Change |
|---|---|---|
| Nikkei 225 | 65,020.94 | +1.26% |
| TOPIX (1306 ETF proxy) | 427.50 | +0.07% |
| SoftBank Group (9984) | 5,590 | +11.78% |
| Fast Retailing (9983) | 69,100 | +1.62% |
| Advantest (6857) | 33,090 | +2.51% |
| Tokyo Electron (8035) | 53,320 | +0.04% |
| Toyota (7203) | 3,081 | -1.15% |
| Sony (6758) | 3,885 | -0.26% |
| USD/JPY (as of Sep 4) | 156.34 | -1.63% |
SoftBank’s move came on heavy conviction — volume ran 2.3x its 20-day average — amid the broader AI rally. Within our fixed 95-name large-cap universe, Nidec (+5.71% on 4.0x normal volume), Murata (+4.20%), Sysmex (+3.31%) and Fanuc (+2.95%) rounded out the gainers. The losers’ column told the yen and commodity story: Mitsui & Co (-4.45% on 2.0x volume), Mitsubishi Corp (-3.10%), Tokyo Gas (-3.08%), MOL (-3.07%) and JFE (-2.83%).
Sectors: Tech Alone at the Top
Using TOPIX-17 ETF proxies (Nomura NEXT FUNDS closes, which can deviate slightly from official sector indices), only 5 of 17 sectors advanced. IT & Services led at +2.49%, beating TOPIX by 2.42 points, followed by Retail (+0.97%) and Steel & Nonferrous (+0.90%). At the bottom sat Energy Resources (-2.60%), Power & Gas (-2.44%, still +5.4% over five days) and Pharmaceuticals (-2.31%). Semiconductor sentiment drew broader support from continuing enterprise AI demand and corporate dealmaking, headlined by NVIDIA’s announced $13 billion acquisition of AI model hub Hugging Face.
Positioning: Short-Sell Ratio Eases to 39.9%
Our daily signature: short sales made up 39.9% of TSE trading value on Friday (31.5% price-rule restricted, 8.4% unrestricted) on total turnover of ¥9.33 trillion. That is the lower third of the past four sessions’ 39.9%-44.8% range (average 42.5%) — a modest step back from defensive posture, consistent with a squeeze-assisted bounce rather than fresh aggression from shorts. Squeeze costs remain broad: 529 of 1,112 JSF loanable issues carried a gyaku-hibu premium — the extra daily fee short sellers pay — as of Thursday’s data.
Thursday’s JSF standardized margin figures (today’s are not yet published) showed leveraged long demand of ¥0.67 trillion against ¥0.23 trillion of stock lending on the short side. Notably, SoftBank margin-loan balances fell 188,900 shares and MUFG’s fell 581,900 before Friday’s rally — leveraged longs were trimming, not chasing — while Advantest saw margin buying build (+101,700 shares).
On the regulatory side, JPX published 1,040 large disclosed short positions across 664 issues on Friday. These are lagged position filings, not today’s selling: KLab tops the list at 17.6% of shares outstanding, with TOWA (14.2%) and Sanrio (10.6%) also heavily positioned. The biggest shifts versus prior reports were ZenmuTech (+2.07pp) and SBI Holdings (-1.90pp). The Nikkei Volatility Index eased 1.13 points to 27.19, its 71st percentile over the past 899 sessions — elevated-normal, not stressed.
Rates and the Yen
JGB yields fell across the curve in Thursday’s MOF data, led by the long end: 10-year at 2.966% (-4.0bp), 30-year at 4.052% (-7.0bp). Attention now turns to the BOJ’s upcoming policy meeting, with the firmer yen the core headwind for Toyota and other exporters on Friday.
Weekly Flows
For the week of August 24-28 (JPX data, published with a lag — these are not today’s flows), foreign investors net sold ¥0.41 trillion of TSE Prime shares while individuals net bought ¥0.69 trillion, a familiar pattern of retail absorbing foreign supply. MOF’s cross-border data for roughly the same week (a different reporting basis, so read direction rather than size) showed foreigners as marginal net buyers of ¥0.04 trillion, softening the bearish read somewhat. JPX’s broader weekly margin balances as of August 28 stood at ¥6.53 trillion of margin buying (+0.05T w/w) versus ¥0.83 trillion of margin selling (-0.07T w/w) — retail leverage remains long-skewed.
What to Watch
- BOJ policy meeting: with the yen already firming, the exporter-vs-financials rotation hinges on how the next meeting lands.
- Breadth: Friday’s 1.26% Nikkei gain came with a flat TOPIX and only 5 of 17 sectors up — watch whether the rally broadens or remains a SoftBank/AI trade.
- Foreign flows: next week’s JPX data will show whether the ¥0.41 trillion of foreign selling extended into this bounce, or whether the MOF data’s marginal buying was the earlier tell.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.