Session at a Glance

KOSPI smashes through 9,000 as SK Hynix HBM4E shipments ignite a region-wide semiconductor rally.

The AI chip supercycle dominated Asia-Pacific this week. South Korea’s KOSPI surged nearly 17% after SK Hynix shipped 12-layer HBM4E samples to AI customers and briefly crossed a ₩2,000 trillion market cap — pushing the index above 9,000 for the first time. The momentum radiated outward: Japan’s Nikkei gained over 10% as Tokyo Electron and chip-equipment names rallied even as the BOJ hiked rates to 1% (the highest since 1995), and Taiwan’s TAIEX climbed almost 8% on TSMC and advanced-packaging strength.

Hong Kong was the clear laggard. China’s May retail sales printed their first annual decline since December 2022 (−0.6% y/y), souring sentiment on consumer-facing names and dragging the Hang Seng down 1.3%. Oil-linked stocks like CNOOC and PetroChina also suffered as Brent hovered near $70. India’s Nifty rose 4.4% on broad strength, though the IT sector was hammered after Accenture slashed its revenue outlook.

The through-line: capital rotated aggressively into semiconductor and AI-adjacent names across every major market, while old-economy energy and weak-consumer China plays were left behind.

Here are the biggest movers across Asia-Pacific’s major exchanges for the week ending Saturday, June 20, grouped by market — each figure is the stock’s move over the full trading week.

Australia (ASX)

↑ NST +8.36%

Mid-cap · 20.87 (local)

Why: Northern Star rose with gold prices as the BOJ rate hike and geopolitical uncertainty lifted safe-haven demand — no company-specific catalyst, just broad precious-metals strength across the ASX.

Pattern: Momentum continuation in the gold-miner complex; NST tends to amplify spot gold moves given its higher operating leverage — part of a broader risk-off hedge bid this week.

↓ RIO -3.77%

Mega-cap · 177.4 (local)

Why: Rio Tinto fell as weak China retail sales data fuelled demand concerns for iron ore and base metals, offsetting positive Oyu Tolgoi copper restart news and the long-term Nuton growth narrative.

Pattern: Mean-reversion pressure on a mega-cap commodity name — China macro weakness is the dominant weekly driver; iron ore sentiment tracks Chinese consumer/property data closely.

Hong Kong (HKEX)

↑ 0005 +7.58%

Mega-cap · 149 (local)

Why: HSBC rallied nearly 8% as the stock hit new multi-year highs on rotation into high-dividend financials and rising global rate expectations following the BOJ hike to 1% — broader banking tailwinds outweighed an Australian scam-compliance fine.

Pattern: Breakout to fresh highs on expanding volume; HSBC is benefiting from a structural re-rating as higher-for-longer rates support net interest margins — one of few Hang Seng names bucking the index weakness.

↓ 0883 -9.47%

Large-cap · 22.38 (local)

Why: CNOOC dropped nearly 10% as Brent crude hovered around $70 — a 15% year-on-year decline — compressing upstream earnings expectations despite the company’s recent Q1 resilience from downstream diversification.

Pattern: Sector rotation away from energy into tech/semis weighed on the entire HK oil complex; CNOOC’s beta to crude makes it the most exposed large-cap name on the Hang Seng to the oil price downdraft.

China — Shanghai (SSE)

↑ 600030 +4.12%

Mid-cap · 26.56 (local)

Why: CITIC Securities rose 4% as Shanghai Composite gained 2.6% on the week — no single catalyst, broad rotation into Chinese brokerage names as market turnover picked up on policy-easing hopes after weak retail sales data.

Pattern: Brokerages are leveraged plays on A-share trading volume; the weekly move tracks the Shanghai Composite’s own gain, suggesting macro-driven sector beta rather than an idiosyncratic catalyst.

↓ 601857 -7.62%

Large-cap · 9.58 (local)

Why: PetroChina fell 7.6% as lower Brent crude prices (down ~15% year-on-year to roughly $70/bbl) pressured upstream earnings forecasts, despite the company’s Q1 profit growth from natural gas and downstream segments.

Pattern: Macro-driven sell-off mirroring global energy weakness; PetroChina’s high crude-oil revenue exposure makes it one of the most rate-sensitive A-share energy names to the Brent price cycle.

China — Shenzhen (SZSE)

↑ 002415 +7.74%

Mid-cap · 32.3 (local)

Why: Hikvision gained nearly 8% as the global AI infrastructure buildout spilled over into Chinese tech hardware — surveillance and smart-city AI names caught a bid alongside the broader semiconductor rally across Asia.

Pattern: Momentum continuation on the AI hardware theme; Hikvision’s edge-AI pivot gives it indirect exposure to the same HBM/GPU capex narrative that powered SK Hynix and Tokyo Electron this week.

↓ 000333 -8.61%

Large-cap · 78 (local)

Why: Midea Group fell 8.6% after China’s May retail sales posted their first annual decline since late 2022, hammering sentiment on domestic appliance and consumer discretionary names exposed to weak household spending.

Pattern: Sector rotation out of consumer discretionary into tech/semis; Midea is a direct read on Chinese consumer health, and the negative retail print triggered a broad de-risking across the home-appliance complex.

Japan (TSE)

↑ 8035 +10.82%

Mid-cap · 7.536e+04 (local)

Why: Tokyo Electron surged nearly 11% as SK Hynix’s HBM4E shipments validated booming demand for advanced chip-fabrication equipment — plus US scrutiny of ASML’s China sales raised the prospect of redirected orders to Japanese toolmakers.

Pattern: Breakout on the AI semiconductor capex theme; Tokyo Electron is the purest-play Japanese beneficiary of HBM and advanced-node equipment spend — the weekly move tracks the KOSPI/TAIEX semi rally almost tick-for-tick.

↓ 6758 -4.62%

Mega-cap · 3140 (local)

Why: Sony fell 4.6% as capital rotated out of entertainment and consumer electronics into semiconductors — concerns over PS5 hardware volume declines and a cautious gaming outlook added to the drag amid a risk-on, AI-first week.

Pattern: Relative underperformance vs the Nikkei’s +10.7% gain signals aggressive sector rotation; investors sold defensive-growth names like Sony to fund semiconductor positions — a classic intra-market factor rotation.

Singapore (SGX)

↑ O39 +4.81%

Large-cap · 24.63 (local)

Why: OCBC Bank gained nearly 5% as higher global rate expectations (BOJ hike, hawkish Fed tone) lifted net interest margin forecasts for ASEAN banks — no company-specific catalyst, just broad financials strength.

Pattern: Momentum continuation in the Singapore bank trio (DBS/OCBC/UOB); the weekly move is consistent with HSBC’s 7.6% gain in Hong Kong — a region-wide financials bid on rates and yield-curve steepening.

↓ H78 -3.68%

Mid-cap · 7.06 (local)

Why: Hongkong Land fell 3.7% as weak China consumer data and a soft Hong Kong commercial property outlook weighed on the real-estate developer — no single catalyst, but China macro headwinds dampened property sentiment region-wide.

Pattern: Mean-reversion pressure on a China-property-exposed name; the weekly decline mirrors the Hang Seng’s weakness and the broader rotation away from old-economy plays toward tech/semis.

South Korea (KOSPI)

↑ 000660 +28.56%

Large-cap · 2.764e+06 (local)

Why: SK Hynix exploded 29% higher after shipping 12-layer HBM4E samples to AI customers and briefly hitting a ₩2,000 trillion market cap — the single biggest catalyst behind KOSPI’s historic break above 9,000.

Pattern: Parabolic breakout to all-time highs on expanding volume; SK Hynix is the global ground zero for the HBM/AI memory supercycle — Goldman lifted KOSPI target to 12,000 on the back of this move.

↓ 000270 -7.13%

Mid-cap · 1.549e+05 (local)

Why: Kia Motors fell 7% as capital rotated violently out of autos and into semiconductors — BYD’s Great Tang hitting 150,000 orders also highlighted rising Chinese EV competition in Kia’s key export markets.

Pattern: Sector rotation casualty; when KOSPI gains 17% and a large-cap falls 7%, it signals aggressive reallocation — auto names were funding sources for the SK Hynix/Samsung semiconductor chase.

Taiwan (TWSE)

↑ 3711 +12.68%

Mid-cap · 613 (local)

Why: ASE Technology surged 13% as the advanced semiconductor packaging leader rode the AI/HBM wave — growing demand for chiplet-based architectures and CoWoS-style packaging validated ASE’s margin expansion and capex thesis.

Pattern: Momentum continuation near all-time highs; ASE is the back-end packaging play on the same AI capex cycle that powered SK Hynix and Tokyo Electron — the weekly move is part of a unified regional semiconductor theme.

India (NSE)

↑ BAJFINANCE +4.74%

Mid-cap · 961.8 (local)

Why: Bajaj Finance rose nearly 5% as Indian financials benefited from strong domestic macro conditions and rate-cut expectations — no single catalyst, broad NBFC sector strength amid healthy credit growth and improving asset quality.

Pattern: Steady momentum in Indian consumer finance; the weekly gain is consistent with Nifty 50’s 4.4% advance — Bajaj Finance is a high-beta proxy for India’s domestic consumption cycle.

↓ INFY -5.82%

Mega-cap · 1051 (local)

Why: Infosys dropped 5.8% after Accenture slashed its FY26 revenue growth guidance from 4-5% to 3-4%, triggering a sector-wide IT sell-off that erased over ₹1.35 lakh crore from Indian IT market caps in a single session.

Pattern: Macro-catalyst sell-off across the entire Indian IT sector; Nifty IT hit a three-year low — Infosys’s high exposure to discretionary digital transformation budgets makes it the most sensitive bellwether to global IT spending signals.

New Zealand (NZX)

↑ AIR +13.10%

Large-cap · 0.475 (local)

Why: Air New Zealand surged 13% — likely a relief bounce after the stock hit multi-year lows on suspended guidance, plus the launch of a new Queenstown-Brisbane seasonal route signaled management confidence in a travel recovery.

Pattern: Mean-reversion bounce from deeply oversold levels; the stock had been under heavy selling pressure from jet fuel cost fears and soft domestic demand — a classic dead-cat or reversal setup depending on follow-through.

↓ SPK -4.12%

Mid-cap · 1.86 (local)

Why: Spark New Zealand fell 4% — no single catalyst, broad defensive telecom weakness as investors rotated toward growth and risk-on names amid the region’s semiconductor-led rally.

Pattern: Sector rotation out of yield-defensive names into growth/tech; Spark’s telecom yield profile makes it a natural funding source when risk appetite surges — the move is consistent with global telco underperformance this week.

Reading the Week

The exchange-by-exchange breakdown above surfaces both market-specific catalysts and cross-border themes. When multiple exchanges move together, look for a macro driver (USD move, commodity price, risk-on/off shift). Isolated single-exchange moves tend to reflect local earnings, regulatory news, or sector rotation.

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