Session at a Glance

Samsung’s 19% AI-memory surge lifts KOSPI to the week’s standout rally across Asia-Pacific.

South Korea’s KOSPI dominated the week with an 8.2% surge, powered by Samsung Electronics gaining nearly 19% as AI-memory demand and HBM momentum drew global capital back into Korean chipmakers. The rally extended for five consecutive sessions, amplified by easing US inflation data that tempered Fed rate-hike expectations and weakened the dollar — a tailwind for export-heavy Asian markets. Japan’s Nikkei rose 3% as the Topix hit fresh highs on record dividend announcements and a Nintendo breakout after Pokémon Pokopia crossed five million sales.

Taiwan rode the semiconductor wave alongside Korea, with TAIEX gaining 3.7% on broad tech strength. Singapore’s STI added 2.5%. On the other side, Australia’s ASX slipped 0.9% as Westpac dragged banks lower amid the KPMG audit scandal probe, while India’s Nifty lost nearly 1% on IT-sector softness. Hong Kong was mixed — JD.com’s 14% selloff on a revenue miss offset modest gains elsewhere.

The through-line: AI-linked semiconductor names led the region, while old-economy sectors and earnings disappointments lagged. Currency dynamics mattered too — yen weakness boosted Japanese exporters, and a softer dollar broadly supported risk appetite across Asia.

Here are the biggest movers across Asia-Pacific’s major exchanges for the week ending Saturday, August 15, grouped by market — each figure is the stock’s move over the full trading week.

Australia (ASX)

↑ CSL +3.26%

Mega-cap · 136.5 (local)

Why: No single catalyst — CSL outperformed a weak ASX as defensive biotech names attracted rotation away from banks hit by the KPMG audit scandal overhang.

Pattern: Relative-strength divergence against the broader ASX decline suggests defensive sector rotation; CSL’s steady grind higher reads as institutional re-weighting rather than momentum breakout.

↓ WBC -6.75%

Large-cap · 35.37 (local)

Why: Westpac fell nearly 7% after being summoned to testify in the KPMG Australia audit scandal probe, dragging the entire banking sector and weighing on the broader ASX.

Pattern: Event-driven breakdown on governance risk — the selloff gapped through near-term support and dragged peers lower, a classic contagion pattern in the tight Australian banking oligopoly.

Hong Kong (HKEX)

↑ 0883 +2.41%

Large-cap · 23.82 (local)

Why: No single catalyst — CNOOC drifted higher alongside crude oil prices holding firm and continued state-fund support for Hong Kong-listed energy names during the week.

Pattern: Modest weekly gain in a flat Hang Seng suggests sector-specific bid for energy; CNOOC’s grind higher reads as mean-reversion after prior underperformance rather than momentum breakout.

↓ 9618 -13.57%

Large-cap · 110.2 (local)

Why: JD.com plunged 14% after Q2 earnings showed a revenue miss despite margin gains — investors punished slowing top-line growth amid fierce Chinese e-commerce competition.

Pattern: Classic post-earnings gap-down on revenue disappointment; the magnitude suggests crowded positioning unwinding, and the sell-through on subsequent sessions signals no dip-buying conviction yet.

China — Shanghai (SSE)

↑ 600519 +2.50%

Mega-cap · 1342 (local)

Why: No single catalyst — Kweichow Moutai gained 2.5% as China’s consumer staples attracted modest rotation amid a quietly positive week for the Shanghai Composite.

Pattern: Defensive blue-chip grind higher within a range-bound Shanghai index; Moutai often leads when institutional flows rotate toward quality amid uncertain macro signals.

↓ 601318 -3.05%

Large-cap · 51.75 (local)

Why: No single catalyst — Ping An Insurance slipped 3% amid broader weakness in Chinese financials as Beijing’s tax clampdown on the insurance sector created regulatory uncertainty.

Pattern: Sector-wide regulatory drag rather than company-specific; the steady weekly decline without sharp gaps suggests institutional de-risking on policy uncertainty rather than panic selling.

China — Shenzhen (SZSE)

↑ 300750 +1.88%

Mega-cap · 393.9 (local)

Why: No single catalyst — CATL edged up 1.9% as EV battery demand sentiment remained constructive and the broader AI-adjacent supply chain rally in Asia lifted tech-linked names.

Pattern: Modest momentum continuation in line with the Shenzhen tech board’s weekly drift higher; CATL’s move was sector-aligned rather than stock-specific, consistent with macro-driven rotation.

↓ 002415 -6.34%

Mid-cap · 34.88 (local)

Why: No single catalyst — Hikvision fell 6.3% as mid-cap Chinese tech names lagged the week’s semiconductor-led rally, with ongoing US export-restriction overhang weighing on surveillance tech.

Pattern: Continued underperformance versus the broader tech sector suggests geopolitical-risk discount remains priced in; the steady weekly decline reads as position trimming rather than event-driven breakdown.

Japan (TSE)

↑ 7974 +16.48%

Mega-cap · 8900 (local)

Why: Nintendo surged 16% after Pokémon Pokopia hit five million sales, validating the Switch 2 software pipeline and reigniting investor confidence in the next console cycle.

Pattern: Catalyst-driven breakout on a concrete sales milestone — the move gapped above prior resistance on volume, part of the broader Japan rally but clearly stock-specific in magnitude.

Singapore (SGX)

↑ H78 +8.92%

Mid-cap · 8.67 (local)

Why: No single catalyst — Hongkong Land rallied 9% as the property developer benefited from improving Hong Kong commercial real-estate sentiment and broader Singapore index strength.

Pattern: Outsized weekly gain for a property name suggests value rotation or short-covering; the move was amplified by thin SGX liquidity and reads as mean-reversion from a depressed base.

↓ C6L -8.44%

Mid-cap · 7.05 (local)

Why: No single catalyst — Singapore Airlines fell 8.4% as travel stocks gave back gains amid rising fuel costs and profit-taking after a strong prior run in the transport sector.

Pattern: Mean-reversion pullback in a momentum name; the weekly decline against a rising STI suggests sector-specific rotation out of travel into property and financials rather than broad risk-off.

South Korea (KOSPI)

↑ 005930 +18.83%

Mega-cap · 2.745e+05 (local)

Why: Samsung surged 19% over five straight sessions as AI-memory and HBM chip demand momentum accelerated, with easing US inflation data boosting export-linked Korean tech across the board.

Pattern: Powerful momentum breakout on the week — AI-semiconductor theme drove concentrated flows into Samsung as the KOSPI heavyweight; the rally’s breadth across Korean chipmakers confirms a sector-wide re-rating.

Taiwan (TWSE)

↑ 2308 +14.24%

Mid-cap · 1885 (local)

Why: Delta Electronics surged 14% as Taiwan’s broader tech rally lifted power-management and infrastructure plays alongside the AI-semiconductor theme driving TAIEX higher for the week.

Pattern: Momentum breakout riding the regional semiconductor supply-chain theme; Delta’s outsized move versus TAIEX’s 3.7% gain suggests stock-specific positioning into AI power-infrastructure demand.

↓ 2317 -0.19%

Large-cap · 259.5 (local)

Why: Hon Hai was essentially flat despite Apple announcing a $60 billion Texas manufacturing expansion — investors may have already priced in the assembly-partner upside or rotated into higher-beta tech names.

Pattern: Flat weekly performance amid a strong TAIEX rally signals relative underperformance; large-cap assembly names lagged as capital rotated into higher-margin semiconductor and power-infrastructure plays.

India (NSE)

↑ BAJFINANCE +0.83%

Mid-cap · 1087 (local)

Why: No single catalyst — Bajaj Finance edged up 0.8% as defensive NBFC names held steady against broad Nifty weakness driven by IT-sector selling and foreign institutional outflows.

Pattern: Marginal outperformance versus a declining index suggests relative-strength positioning in domestic-facing financials; the move is too small to signal conviction — more a hold than a buy.

↓ TCS -3.74%

Mega-cap · 2361 (local)

Why: TCS fell 3.7% as Indian IT heavyweights faced continued pressure from a strengthening rupee, cautious enterprise spending signals, and foreign institutional rotation out of large-cap tech.

Pattern: Sector-wide IT weakness rather than stock-specific; TCS’s steady weekly decline without sharp gaps suggests institutional position reduction, consistent with the broader Nifty underperformance.

New Zealand (NZX)

↑ FPH +2.45%

Large-cap · 42.72 (local)

Why: No single catalyst — Fisher & Paykel Healthcare gained 2.5% as defensive healthcare names attracted flows in a quiet New Zealand market benefiting from the broader Asia-Pacific risk-on tone.

Pattern: Steady weekly grind higher in a low-volatility NZX name; the move is consistent with global healthcare sector rotation and NZD stability rather than any stock-specific driver.

↓ MEL -1.07%

Mid-cap · 5.55 (local)

Why: No single catalyst — Meridian Energy slipped 1% in a modest pullback likely driven by profit-taking in utilities after prior strength, with no material news flow during the week.

Pattern: Minor mean-reversion in a low-beta utility name; the 1% decline is within normal weekly noise for NZX-listed infrastructure stocks and does not signal a trend change.

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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