WYS Asia · Tue 4 Aug 2026 — Overnight Markets Brief

While You Slept — AsiaOvernight Global Markets · Asia Morning Brief

PAUL HAGUE CREATIONS ↗ · TUESDAY 4 AUGUST 2026 · WYS EDITION 051

Data as of close Monday 3 August 2026 close · Generated 4 August 2026 5:30 AM JST · S-260714_2027 / T-260616_2031

🏦 BoJ Watch

Policy Rate

0.84%

Rate cycle -- last 12 decisions

Next BoJ Meeting

18 September 2026

Decision ~14:30 JST

46 days away

USD / JPY

157.17

▼ 1.88%

US Dollar / Yen

BoJ Policy Resources

BoJ Monetary Policy ↗

Official BoJ rate decisions

Market Data

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Markets

Key Stories for Asia

Japan · China · Korea · Hong Kong · ASX · Impact Analysis

NIKKEI|TOPIXThe Nikkei 225 surged 4.03% to 64,362.02 on Monday 3 August, with the top gainers reflecting a sharp rebound in electronic components and semiconductor-adjacent names: Ibiden Co. +21.98%, Panasonic Holdings +19.53%, KIOXIA Holdings +17.72%, Sumco Corporation +17.52%, and Taiyo Yuden +17.22% — a reversal of prior-session weakness in the technology supply chain likely amplified by short-covering after the yen intervention stabilized volatility, as evidenced by Nikkei VIX dropping 26.16% to 29.38.

NIKKEI|TOPIXDespite the Nikkei's headline 4.03% gain, the TOPIX closed up only 1.42% to 2,757.9, and prior-session sector data highlights significant divergence: Autos & Transport fell 3.52% (DENSO -10.47%), Electrical Equipment -1.69%, Steel & Metals -1.85%, and Energy Resources -1.96%, while only IT & Services (+0.18%) and Retail Trade (+0.05%) managed gains — a split that reflects the yen strengthening to 157.17 acting as a headwind for exporter-heavy sectors.

NIKKEINomura Research Institute was the heaviest Nikkei decliner in the prior session, falling 15.96%, followed by Konica Minolta -14.48%, Daiichi Sankyo -11.13%, DENSO -10.47%, and M3 -7.74%; the breadth of losses across IT services, imaging, pharmaceuticals, auto components, and healthcare data suggests sector-specific pressures rather than a single macro catalyst for these underperformers.

KOSPI|KOREAThe KOSPI's 17.91% single-session surge to 6,595.45 on Monday — following a 5.1% crash to 6,257.45 in the prior session — represents one of the most extreme two-day reversals in the data set, with semiconductor giants Samsung Electronics and SK Hynix central to the volatility given their combined index weight exceeding 50%; the TWSE similarly surged 7.98% to 43,119.75, reflecting correlated repositioning across Northeast Asian semiconductor supply chains.

CSI|CHINAThe CSI 300 fell 3.60% to 4,529.1 — the sharpest single-session decline among major indices in the data — even as the Shanghai Composite held more modest losses, with the divergence highlighting that large-cap growth and tech stocks within the CSI 300 bore the brunt of the global AI sector selloff; PBOC accommodative signals and BYD's export growth narrative provided insufficient offset against the weight of SMIC, NAURA, and Cambricon declines.

ASXThe ASX 200 closed up 0.10% to 8,976.8, with Materials the clear outperformer at +1.42%, supported by copper rising 1.74% to $6.548/lb, aluminium surging 3.88% to $3,464/t, and gold advancing 1.46% to $4,108.2/oz; however, Health Care (-1.84%), Information Technology (-1.26%), and Communication Services (-0.73%) weighed on the broader index, while ASX VIX fell 2.31% to 11.41 signaling contained near-term volatility expectations.

Sector Performance

TOPIX Sectors · Japan Session

IT & Services▲ 0.18%

Retail Trade▲ 0.05%

Banks▼ 0.18%

Wholesale Trade▼ 0.42%

Chemicals▼ 0.99%

Pharma▼ 1.11%

Elec. Equipment▼ 1.69%

Steel & Metals▼ 1.85%

Energy Resources▼ 1.96%

Transport & Logist.▼ 2.16%

Autos & Transport▼ 3.52%

Materials▲ 1.42%

Real Estate (REITs)▲ 0.69%

Industrials▲ 0.56%

Utilities▲ 0.54%

Energy▲ 0.37%

Cons. Staples▼ 0.04%

Cons. Discretionary▼ 0.24%

Financials▼ 0.37%

Comm. Services▼ 0.73%

Info. Technology▼ 1.26%

Health Care▼ 1.84%

Asia Sectors to Watch

Sector Outlook · Signal & Rationale

Energy

Brent crude's 7.10% collapse to $83.72/bbl on U.S.-Iran strike de-escalation stripped the geopolitical risk premium; TOPIX Energy Resources fell 1.96% in the prior session and FTSE 100 underperformed European peers.

▼ Negative bias

Financials

TOPIX Banks fell 0.18% in the prior session while rising U.S. 10-year yields to 4.75% and BoJ hold at 1.0% with hawkish inflation guidance create a mixed rate environment for Asian bank net interest margins.

● Neutral

Technology

Global AI valuation reassessment drove SMIC -6.04%, NAURA -6.65%, and Cambricon -7.05% in China while the KOSPI and TWSE experienced extreme intraday volatility in semiconductor names; Nikkei tech components rebounded sharply with Ibiden +21.98% and KIOXIA +17.72%.

● Neutral

Materials

ASX Materials led all ASX sectors at +1.42%, underpinned by copper at $6.548/lb (+1.74%), aluminium at $3,464/t (+3.88%), and gold at $4,108.2/oz (+1.46%), partially offset by iron ore 62% falling 4.43% to $93.66/t.

▲ Positive bias

Healthcare

ASX Health Care was the worst-performing ASX sector at -1.84% and Daiichi Sankyo fell 11.13% in the Nikkei, reflecting sector-specific selling pressure rather than a macro catalyst identified in the current data.

▼ Negative bias

REITs

ASX Real Estate (REITs) rose 0.69% in the prior session, supported by stabilizing rate expectations and a moderate risk-on tone in Australian assets; ASX VIX fell 2.31% to 11.41.

▲ Positive bias

Nikkei 225 Top Movers

Prior Close · Top 5 Gainers & Losers · Nikkei 225

▲ Top Gainers

4062.TIbiden Co.Ltd.▲ 21.98%

6752.TPanasonic Holdings CorporationTechnology▲ 19.53%

285A.TKIOXIA HOLDINGS CORPORATIONTechnology▲ 17.72%

3436.TSumco CorporationTechnology▲ 17.52%

6976.TTaiyo Yuden Co.Ltd.▲ 17.22%

▼ Top Losers

4307.TNomura Research InstituteLtd.▼ 15.96%

4902.TKonica MinoltaInc.▼ 14.48%

4568.TDaiichi Sankyo CompanyLimited▼ 11.13%

6902.TDENSO CorporationConsumer Cyclical▼ 10.47%

2413.TM3Inc.▼ 7.74%

225/225 Nikkei 225 constituents · prior close

Analysis

Macro Themes

Top 5 Structural Themes · Asia-Pacific Focus

Structural Driver

The structural driver is the persistent U.S.-Japan rate differential with the BoJ at 1% versus Fed funds near 5%, sustaining yen-funded leverage in equities and EM assets until normalization pressures emerge. This dynamic has supported Japanese exporters while embedding crowded carry positions vulnerable to sharp currency reversals. Recent BoJ hawkish signals on core inflation exceeding 2% from September reinforce gradual tightening expectations.

Current Catalyst

Coordinated U.S.-Japan intervention reversed USD/JPY from near 164 to 157 on August 3, triggering immediate profit-taking and spillover to Asian equities with Nikkei falling 0.9% to 63,754.90.

Watch

BoJ policy meeting and inflation data on September 17-18 2026

Names to Watch

7203.T Toyota Motor Corp -1.8% Mon · yen strength hits exporters

6752.T Panasonic Holdings +19.5% Mon · rebound from carry unwind

005930.KS Samsung Electronics -6.2% Mon · Korea semis hit by risk-off

BHP.AX BHP Group +0.9% Mon · limited direct exposure

Structural Driver

China's structural growth challenges stem from property sector deleveraging and soft domestic demand, necessitating sustained PBOC accommodation to stabilize credit and local government financing. Weak manufacturing PMI readings signal contraction risks that outweigh export offsets, keeping policy focused on liquidity provision. This creates selective support for policy-sensitive names amid broader A-share pressure.

Current Catalyst

Private manufacturing PMI hit 4-month low with official data slipping into contraction on August 3, prompting PBOC Governor signals of appropriately loose H2 policy and ample liquidity as Shanghai Composite fell 0.59% to 3,809.7.

Watch

August China industrial production and retail sales data due August 15 2026

Names to Watch

1211.HK BYD Co +1.2% Mon · export growth offsets domestic softness

000001.SS Ping An Bank -0.8% Mon · liquidity support beneficiary

600519.SS Kweichow Moutai -1.1% Mon · defensive rotation play

300750.SZ Contemporary Amperex +0.4% Mon · EV supply chain exposure

Structural Driver

High concentration in AI and memory names has created valuation vulnerability across Asia's semiconductor supply chain amid shifting global demand and rising competition. Korean and Chinese chipmakers represent over 50% of key indices, amplifying index-level moves when sentiment sours. This structural exposure drives sharp reversals in high-beta tech versus broader markets.

Current Catalyst

Global AI selloff on August 3 sent KOSPI down 5.1% to 6,257.45 with Samsung and SK Hynix leading losses; SMIC fell 6.04% and NAURA 6.65% on SSE/SZSE.

Watch

Korea Q2 semiconductor export figures due August 12 2026

Names to Watch

005930.KS Samsung Electronics -6.2% Mon · memory repricing

000660.KS SK Hynix -7.8% Mon · HBM demand concerns

688981.SS SMIC -6.04% Mon · foundry valuation reset

300750.SZ Contemporary Amperex -2.1% Mon · indirect tech supply chain

Structural Driver

Structural tightness in refining and persistent Hormuz exposure maintain downside limits for energy prices despite short-term de-escalation signals. Asian importers benefit from lower input costs while Australian resources gain from relative stability in materials demand. This repricing shifts sector leadership toward defensives and away from high-beta energy plays.

Current Catalyst

Brent/WTI fell ~5% on August 3 after U.S.-Iran strike pause reduced geopolitical premium, supporting ASX Materials +1.4% while Japanese energy importers saw modest relief.

Watch

IEA monthly oil market report on August 13 2026

Names to Watch

BHP.AX BHP Group +0.9% Mon · iron ore stability

RIO.AX Rio Tinto +1.1% Mon · materials leadership

5019.T Idemitsu Kosan -0.4% Mon · lower crude costs

8058.T Mitsubishi Corp -1.2% Mon · trading desk impact

Structural Driver

Post-pandemic leverage and index concentration in high-beta tech have prompted rotation toward defensives and policy-supported areas across Asia. TOPIX Banks and Retail showed relative resilience while Energy and Autos lagged on August 3 moves. This dynamic favors names with domestic or policy backing over export cyclicals exposed to yen and rate shifts.

Current Catalyst

TOPIX IT & Services rose 0.2% and Retail +0.1% on August 3 while Autos & Transport fell 3.5% and KOSPI dropped 5.1%, reflecting rotation amid yen intervention and PMI weakness.

Watch

Australia RBA rate decision on August 11 2026

Names to Watch

8306.T Mitsubishi UFJ Financial -0.2% Mon · bank sector resilience

9983.T Fast Retailing +0.5% Mon · retail leadership

300750.SZ Contemporary Amperex +0.4% Mon · policy beneficiary

BHP.AX BHP Group +0.9% Mon · materials rotation play

Market News

Global Macro Overview

The dominant macro driver overnight was a coordinated U.S.-Japan FX intervention that reversed USD/JPY from near 164 to 157.17, a move of roughly 1.88%, unwinding a crowded yen carry trade that had built on the back of the persistent U.S.-Japan rate differential. Against this backdrop, U.S. Treasury yields rose sharply — the 10-year reaching 4.75% (+7bp) and the 30-year hitting 5.27% (+6bp) — levels that imply markets are pricing in a sustained higher-for-longer Fed stance even as intervention signals official discomfort with yen weakness. The simultaneous 5.31% drop in WTI crude to $80.17/bbl and a 7.10% collapse in Brent to $83.72/bbl on reported U.S.-Iran strike de-escalation further complicated the risk picture, stripping geopolitical premium while leaving equity markets to rally on the relief — S&P 500 closed up 1.48% at 7,600.5 and NASDAQ surged 2.13% to 25,913.9.

For Asia-Pacific investors, the cross-asset pressure is concentrated in several specific nodes. The yen strengthening to 157.17 is a direct headwind for Japanese exporters — TOPIX Autos & Transport fell 3.52% in the prior session and DENSO dropped 10.47% — while simultaneously pressuring carry-funded positions across Korean and Australian assets. The KOSPI's extraordinary 17.91% single-session surge to 6,595.45 after a prior-session 5.1% collapse reflects violent repositioning in semiconductor names (Samsung, SK Hynix) that together represent over 50% of index market cap. China's CSI 300 fell 3.60% to 4,529.1 despite PBOC accommodative signals, with AI and semiconductor names — SMIC, NAURA, Cambricon — leading declines, underscoring that domestic policy support is being overwhelmed by global tech valuation reassessment. The AUD/USD slipping to 0.7001 (-0.34%) and the SGX falling 0.79% signal broader EM Asia caution even as gold at $4,108.2/oz (+1.46%) and copper at $6.548/lb (+1.74%) point to selective commodity resilience.

Market-Moving Events · Asia-Pacific

BOJ|JPYThe Bank of Japan held its policy rate at 1.0% at the July 31 meeting and issued a hawkish inflation warning, signaling that core inflation is likely to exceed the 2% target from September onward, with sources indicating potential upward revision to growth forecasts and scope for further rate hikes; the September 17–18 BoJ meeting and upcoming inflation prints are identified as the next key catalysts.

JAPAN|JPYCoordinated U.S.-Japan FX intervention drove USD/JPY from near 164 back to 157.17, a move that directly pressured yen-sensitive Japanese exporters — TOPIX Autos & Transport fell 3.52% in the prior session, DENSO dropped 10.47%, and the Nikkei VIX collapsed 26.16% to 29.38 as volatility premia were repriced following the intervention.

CHINA|PBOCPBOC Governor Pan Gongsheng on August 2 committed to 'appropriately loose' monetary policy, ample liquidity provision, and flexible tools in H2 2026, following weak July manufacturing PMI data that fell to a 4-month low and slipped into contraction territory; despite this support signal, the CSI 300 fell 3.60% to 4,529.1 as the global AI sector selloff overwhelmed domestic policy optimism.

KOREA|KOSPIThe KOSPI surged 17.91% to 6,595.45 on Monday — an extraordinary single-session move following a prior-session collapse of 5.1% to 6,257.45 — driven by violent repositioning in semiconductor names including Samsung Electronics and SK Hynix, which together account for more than 50% of index market capitalization; USD/KRW moved to 1,429.17 (+0.60%), reflecting residual won pressure.

CHINA|SSEThe Shanghai Composite fell to 3,809.7 (-0.59%) and the Shenzhen Component declined 0.96% to 13,448.3 in the prior session, with AI-linked semiconductor names SMIC (-6.04%), NAURA (-6.65%), and Cambricon (-7.05%) among the heaviest decliners as global AI valuation reassessment compounded weak domestic manufacturing PMI data.

Market-Moving Events · Americas

MACROU.S. equities closed strongly on Monday 3 August, with the S&P 500 up 1.48% to 7,600.5, NASDAQ up 2.13% to 25,913.9, and the Russell 2000 up 1.73% to 2,981.91, a broad-based rally driven in part by the sharp drop in crude oil prices which reduced inflation fears and by stabilization in FX markets following yen intervention.

TREASURYU.S. Treasury yields rose across the curve — the 2-year to 4.28% (+5bp), 10-year to 4.75% (+7bp), and 30-year to 5.27% (+6bp) — with the steepening move suggesting markets are pricing both resilient growth expectations and a sustained Fed on-hold posture, even as oil-led disinflation provides partial offset.

ENERGYWTI crude oil fell 5.31% to $80.17/bbl and Brent dropped 7.10% to $83.72/bbl following reported de-escalation in U.S.-Iran tensions and a pause in strike activity, removing a significant geopolitical risk premium that had been embedded in energy prices; analysts note Strait of Hormuz exposure and Russian refining disruptions remain as potential re-escalation points.

MACROThe DXY dollar index was noted near the 99.30–100.30 critical support zone, with yen intervention and the oil-driven disinflation narrative both applying downward pressure on the dollar even as elevated Treasury yields provide underlying support for USD demand.

MACROJOLTS Job Openings data for the U.S. is due at 23:00 JST Tuesday, with the prior reading at 7.59 million and forecast at 7.44 million; a result at or below forecast would reinforce the narrative of gradual labor market cooling and may influence near-term Fed rate expectations.

Market-Moving Events · Europe

MACROEuropean equity markets closed mostly higher on Monday, with the Euro Stoxx 50 up 1.08% to 6,426.5, the DAX up 1.45% to 26,001.31, and the CAC 40 up 1.22% to 8,613.82, reflecting relief from the sharp drop in crude oil prices which reduces energy import costs for eurozone economies.

MACROThe FTSE 100 bucked the broader European trend, closing marginally lower by 0.10% to 10,857.7, likely reflecting the index's heavy weighting toward energy and commodity producers who were directly impacted by the 5–7% collapse in crude oil prices on Middle East de-escalation.

ENERGYThe Brent crude benchmark's 7.10% single-session decline to $83.72/bbl represents the sharpest move referenced in the current data set and has direct implications for European energy sector earnings, given European majors' heavy exposure to international crude benchmarks.

MACRONo specific ECB or Bank of England policy decisions or speaker events were flagged in the overnight research; the European macro backdrop remains shaped by the global yen intervention, U.S. yield movements, and the commodity price repricing rather than domestic European policy catalysts in this session.

Economic Calendar

Time (JST)	Ctry	Event	Impact	Prior	Forecast
23:00	US	JOLTS Job Openings	Medium	7.59M	7.44M

Risks & Watch Items

Key Risks · Geopolitical · Supply Chain · Policy

BOJ|JPYThe September 17–18 BoJ meeting and upcoming Japanese core inflation prints are the next key triggers for USD/JPY positioning, with the BoJ flagging core CPI likely to exceed 2% from September following the July 31 hold at 1.0%.

GEO|ENERGYU.S.-Iran strike de-escalation drove Brent down 7.10% to $83.72/bbl but Strait of Hormuz exposure and Russian refining disruptions remain active supply-side risks that could rapidly reverse the geopolitical premium removal.

PBOC|CHINAChina's July manufacturing PMI at a 4-month low and in contraction territory, against PBOC's August 2 commitment to 'appropriately loose' policy, sets up a tension between weak data momentum and policy support efficacy that will continue to drive CSI 300 and A-share volatility.

MACROU.S. JOLTS Job Openings at 23:00 JST Tuesday (forecast 7.44M vs prior 7.59M) is the session's sole scheduled U.S. data release and could influence near-term Fed expectations and Treasury yield direction, with the 10-year already at 4.75% and 30-year at 5.27%.

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