Session at a Glance

AI memory mania powers Korea and Taiwan to records as China and Hong Kong drift on stimulus disappointment.

The week’s defining theme was a violent re-rating of the AI memory and power-infrastructure complex. South Korea’s KOSPI ripped +8.45% and Taiwan’s TAIEX added +5.83% as SK Hynix crossed the $1 trillion market-cap mark on reports that hyperscalers are pre-funding HBM capacity, and Samsung confirmed it began shipping HBM4 samples globally. Japan’s Nikkei rode the same wave to +4.72%, with SoftBank doing heavy lifting.

Greater China was the mirror image. Hang Seng slipped -0.80% and Shanghai Composite -1.08% after PBoC governor commentary tempered hopes for fresh stimulus, and JD.com was hit by an EU foreign-subsidies probe into its Ceconomy bid. Australia’s ASX 200 added a quiet +0.86%, India’s Nifty edged -0.45% on bank weakness, and Singapore was flat.

The through-line: this was a single-factor week. If you were levered to AI silicon and power, you went vertical; if you were levered to Chinese consumption or policy, you bled.

Here are the biggest movers across Asia-Pacific’s major exchanges for the week ending Saturday, May 30, grouped by market — each figure is the stock’s move over the full trading week.

Australia (ASX)

↑ WES +6.84%

Large-cap · 79.79 (local)

Why: Wesfarmers caught a bid as the ASX 200 grinded higher on global risk-on flow, with Bunnings and Kmart parent benefiting from defensive-consumer rotation as resource names lagged.

Pattern: Momentum continuation through prior range high — a quiet breakout in a low-volatility name riding the broader Asia tech tailwind into Australian defensives, not an isolated catalyst.

↓ CSL -3.16%

Mega-cap · 96.61 (local)

Why: CSL drifted lower with no fresh catalyst, continuing a multi-week underperformance as Australian healthcare lagged the global AI-led rotation pulling capital into chips and power infrastructure.

Pattern: Sector rotation funding source — defensive healthcare bleeding as money chases AI beta. Mean-reversion candidate but no trigger this week.

Hong Kong (HKEX)

↑ 9999 +13.05%

Mid-cap · 194.1 (local)

Why: NetEase surged on no single headline — investors leaned into Chinese gaming as a relative safe haven within Hong Kong tech while e-commerce names sold off on regulatory and tariff anxieties.

Pattern: Defensive momentum within a weak tape — single-name strength against a falling Hang Seng signals a quality-rotation pattern, not broad sector strength.

↓ 9618 -8.10%

Large-cap · 113.5 (local)

Why: JD.com sold off after the EU launched a foreign-subsidies probe into its bid for German retailer Ceconomy, layered on top of broader weakness in Chinese consumer names and PBoC stimulus disappointment.

Pattern: Event-driven break of weekly support — a specific regulatory catalyst inside a sector already under pressure, classic momentum-down continuation rather than isolated drawdown.

China — Shanghai (SSE)

↑ 601166 +5.96%

Mid-cap · 18.5 (local)

Why: Industrial Bank moved higher with no single catalyst, likely benefiting from yield-curve dynamics as investors rotated toward higher-yielding A-share financials amid PBoC policy ambiguity.

Pattern: Mean-reversion bid in a beaten-down sector — A-share banks catching a bounce as defensive income plays while growth names in Shanghai stalled.

↓ 601857 -1.90%

Large-cap · 10.87 (local)

Why: PetroChina drifted with the broader Shanghai weakness, with no fresh catalyst — oil majors lagged as crude prices wobbled and the China-stimulus-disappointment trade weighed on cyclical heavyweights.

Pattern: Quiet macro-driven drift — part of the broader A-share weakness rather than a single-name story; algos read this as low-volatility continuation lower.

China — Shenzhen (SZSE)

↑ 300750 +3.12%

Mega-cap · 424 (local)

Why: CATL ground higher on no single catalyst, with EV-battery demand chatter and continued global energy-storage capex providing a steady bid even as the broader Shenzhen tape softened.

Pattern: Relative-strength leadership — outperforming a weak index signals institutional accumulation in a mega-cap thematic name rather than broad-market momentum.

↓ 002415 -3.99%

Mid-cap · 30.56 (local)

Why: Hikvision pulled back on no single catalyst, drifting with the broader Shenzhen weakness as US-China tech-export tensions kept a lid on surveillance and security hardware names.

Pattern: Sector drift within a soft tape — no clean technical signal, just macro-driven continuation as China-tech sentiment stays cautious.

Japan (TSE)

↑ 9984 +10.86%

Mega-cap · 7491 (local)

Why: SoftBank ripped on the AI-infrastructure rally, with the DigitalBridge–ArcLight $1.05B AI-power deal underscoring the data-center power thesis that’s lifted every Vision Fund-adjacent holding this week.

Pattern: Momentum breakout on macro theme — SoftBank trades as a leveraged proxy on the entire AI/Arm/OpenAI complex, so a tape this strong in chips and power mechanically lifts it.

↓ 8306 -2.98%

Large-cap · 2999 (local)

Why: Mitsubishi UFJ sold off as the JGB curve flattened and the BOJ delivered no fresh hawkish guidance — Japanese megabanks need rising long-end yields to expand net interest margins.

Pattern: Rotation funding source — money rotating out of Japanese banks into AI/chip names, a textbook risk-on intra-Nikkei rotation pattern.

Singapore (SGX)

↑ C6L +3.35%

Mid-cap · 6.78 (local)

Why: Singapore Airlines firmed on no single headline, supported by steady premium-leisure travel demand and a softer jet-fuel tape — a quiet operational tailwind in an otherwise flat Straits Times week.

Pattern: Low-volatility momentum — slow grind higher with no catalyst, typical of a defensive cash-generative name attracting income-style flows.

↓ Z74 -7.66%

Large-cap · 4.34 (local)

Why: Singtel sold off with no fresh negative catalyst, likely on rotation out of regional telcos and into the regional AI-chip complex — Grab-led Singapore tech captured the marginal flow.

Pattern: Sector rotation drawdown — defensive telco bleeding as investors fund AI/tech bets elsewhere in the region; mean-reversion setup but no trigger yet.

South Korea (KOSPI)

↑ 000660 +20.28%

Large-cap · 2.333e+06 (local)

Why: SK Hynix ripped +20% after crossing the $1 trillion market-cap mark on reports that Microsoft, Google, and Amazon are pre-funding HBM capacity, plus first-quarter operating margin of 72% topping NVIDIA’s.

Pattern: Parabolic momentum continuation — single-stock blow-off that single-handedly explains the KOSPI’s +8.45% week; this is the defining algo trade of the global tape right now.

Taiwan (TWSE)

↑ 2308 +16.71%

Mid-cap · 2445 (local)

Why: Delta Electronics surged on the AI-power infrastructure thesis — as a key supplier of data-center power supplies and cooling, it’s a direct beneficiary of the hyperscaler capex cycle behind the chip rally.

Pattern: Thematic momentum breakout — Delta is the cleanest Taiwan play on AI power, so capital follows the SK Hynix/Samsung narrative downstream into power infrastructure.

India (NSE)

↑ ICICIBANK +2.86%

Large-cap · 1273 (local)

Why: ICICI Bank firmed modestly with no fresh catalyst, outperforming HDFC Bank as investors favored its faster loan-book growth and improving asset-quality trajectory within a soft Nifty week.

Pattern: Relative-strength within sector — pair-trade dynamics with HDFC Bank, classic Indian-financials rotation rather than market beta.

↓ HDFCBANK -2.90%

Mega-cap · 744.5 (local)

Why: HDFC Bank drifted lower with no fresh catalyst, pressured by ongoing margin-compression chatter and rotation into peers like ICICI as investors reweighted India bank exposure.

Pattern: Pair-trade short leg against ICICI — quiet intra-sector rotation, not broad market weakness; mean-reversion candidate at lower levels.

New Zealand (NZX)

↑ FPH +9.35%

Large-cap · 37.29 (local)

Why: Fisher & Paykel Healthcare jumped after a well-received full-year report drew positive analyst broker revisions, with hospital and homecare hardware demand running ahead of expectations.

Pattern: Earnings-driven breakout — clean post-results gap and continuation, the only NZX large-cap doing real work this week against a quiet tape.

↓ SPK -1.51%

Mid-cap · 1.96 (local)

Why: Spark drifted lower on no fresh catalyst, continuing its multi-month underperformance as NZ telcos lag the global tech rotation and dividend-yield appeal fades against rising offshore alternatives.

Pattern: Slow-bleed continuation — low-volatility defensive losing to opportunity cost as global AI tape rips; no reversal signal yet.

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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