Session at a Glance

KOSPI crashes 10% triggering circuit breakers as US Big Tech selloff hammers Asia’s semiconductor belt.

A brutal US tech selloff — led by losses in Arm, Alphabet, and AI infrastructure names — cascaded across Asia-Pacific on Monday, with South Korea’s KOSPI plunging 10% and triggering circuit breakers twice. SK Hynix and Samsung Electronics bore the brunt as regulatory scrutiny of leveraged semiconductor products amplified panic selling. Foreign investors were heavy net sellers across Seoul and Tokyo.

Japan’s Nikkei snapped an eight-session winning streak, dragged lower by SoftBank Group’s 10% plunge on Arm Holdings weakness. Hong Kong and mainland China fell in sympathy, though losses were comparatively contained. Defensive pockets held — ANZ Bank, HSBC, and Singapore’s UOB were among the few green spots, reflecting a classic risk-off rotation into financials.

The thread connecting today’s biggest losers — SK Hynix, SoftBank, Xiaomi, Hikvision, Hon Hai — is AI supply-chain exposure. Conversely, MediaTek bucked the trend on its deepening Google TPU partnership, underscoring that the selloff is discriminating between pure momentum and structural design wins.

Here are the standout movers across Asia-Pacific’s major exchanges for the session of Tuesday, June 23, grouped by market.

Australia (ASX)

↑ ANZ +1.39%

Large-cap · 35.74 (local)

Why: No clear catalyst — ANZ caught a defensive bid as investors rotated out of tech and into big-four Australian banks amid the broader Asia risk-off session.

Pattern: Classic risk-off sector rotation into financials. Relative strength in a down tape often signals institutional repositioning rather than a standalone breakout — watch for follow-through.

↓ NST -2.74%

Mid-cap · 20.62 (local)

Why: No company-specific headlines — Northern Star likely pulled back on profit-taking after gold’s recent run, with risk-off flows favouring banks over gold miners today.

Pattern: Mean-reversion move within a broader uptrend. Gold miners tend to lag physical gold on risk-off days when equities dominate the volatility narrative — isolated, not trend-breaking.

Hong Kong (HKEX)

↑ 0005 +0.54%

Mega-cap · 148.7 (local)

Why: HSBC gained modestly as a defensive haven in a sea of red, supported by steady dividend expectations and news of its PayMe merchant expansion across Asia payments.

Pattern: Relative outperformance in a down tape is a hallmark of institutional defensive positioning. HSBC’s mega-cap yield profile attracts flows when growth names sell off — momentum continuation in a value rotation.

↓ 1810 -4.64%

Large-cap · 22.62 (local)

Why: Xiaomi fell 4.6% as the US tech selloff hit Hong Kong hardware names. Recent Q1 results showing a 43-57% profit decline and 20% smartphone shipment drop weighed on sentiment.

Pattern: Momentum breakdown — Xiaomi had rallied hard on EV and ecosystem optimism, but deteriorating handset margins and rising memory chip costs are reasserting fundamental gravity. Part of broader HK tech de-rating.

China — Shanghai (SSE)

↑ 601988 +3.37%

Mid-cap · 6.14 (local)

Why: Bank of China rose 3.4% as mainland investors rotated into high-dividend state-owned banks amid the tech selloff, a familiar defensive playbook in China’s A-share market.

Pattern: Sector rotation into SOE banks is a recurring pattern during China risk-off episodes. State bank relative strength often marks a defensive bottom rather than a sustained rally — mean-reversion candidate.

↓ 601318 -3.04%

Large-cap · 50.4 (local)

Why: Ping An Insurance dropped 3% as broader market weakness and risk-off sentiment hit large-cap financials exposed to equity-market performance through their investment portfolios.

Pattern: Ping An’s equity portfolio linkage makes it a beta play on Shanghai sentiment. The 3% drop tracks the index decline — macro-driven, not company-specific. Watch for mean-reversion if the index stabilises.

China — Shenzhen (SZSE)

↑ 000001 +0.56%

Mid-cap · 10.71 (local)

Why: Ping An Bank edged up 0.6%, likely benefiting from the same SOE-bank defensive rotation visible in Bank of China — investors parking capital in high-dividend financial names.

Pattern: Modest gain in a down tape reflects defensive positioning rather than a breakout. Banking sector relative strength in Shenzhen mirrors the Shanghai rotation — part of a broader theme, not isolated.

↓ 002415 -4.33%

Mid-cap · 31.41 (local)

Why: Hikvision dropped 4.3% as the global tech selloff hit China’s AI-adjacent hardware names. Ongoing US entity-list concerns and broader risk-off sentiment compounded the move.

Pattern: Momentum breakdown in line with the regional AI supply-chain selloff. Hikvision’s dual headwinds — US sanctions overhang plus sector de-rating — make this a macro-driven move, not mean-reversion territory yet.

Japan (TSE)

↑ 9432 +0.14%

Large-cap · 144.2 (local)

Why: NTT was essentially flat at +0.1%, holding steady as a defensive telecom while the rest of the Nikkei sold off. No company-specific catalyst — pure risk-off haven positioning.

Pattern: Telecom relative strength during a tech rout is textbook defensive rotation. NTT’s dividend yield and low-beta profile attract institutional capital in exactly this kind of session — not a breakout signal.

↓ 9984 -10.09%

Mega-cap · 6513 (local)

Why: SoftBank Group plunged 10% after subsidiary Arm Holdings fell over 7% in US trading. The broader AI infrastructure selloff and concerns over Arm’s valuation drove aggressive selling in Tokyo.

Pattern: High-beta momentum reversal — SoftBank amplifies Arm’s moves through its concentrated holding. The 10% drop on an 8-session rally break fits a classic blow-off-top exhaustion pattern. Watch for dead-cat bounce attempts.

Singapore (SGX)

↑ U11 +0.76%

Large-cap · 39.76 (local)

Why: UOB gained 0.8% as Singapore’s Straits Times Index was the only flat-to-green major AP index. Southeast Asian banks caught defensive flows as the tech rout bypassed the financial hub.

Pattern: Relative strength in a regional down tape — Singapore banks are low-tech-exposure, high-dividend names that attract capital during exactly this kind of rotation. Continuation of a steady uptrend, not a breakout.

South Korea (KOSPI)

↓ 000660 -12.47%

Large-cap · 2.555e+06 (local)

Why: SK Hynix cratered 12.5% as KOSPI triggered circuit breakers. The US Big Tech selloff hit memory chipmakers hardest, amplified by regulatory scrutiny of leveraged semiconductor products in Korea.

Pattern: Capitulation-style momentum breakdown from elevated levels. Circuit-breaker sessions often mark short-term washout lows, but the regulatory overhang on leveraged products adds a structural headwind beyond the one-day move.

Taiwan (TWSE)

↑ 2454 +1.57%

Large-cap · 4535 (local)

Why: MediaTek bucked the tech selloff, rising 1.6% on its strengthening Google TPU partnership — reports confirmed MediaTek as exclusive partner for TPU v9 Triggerfish, doubling its AI ASIC revenue target to $2B.

Pattern: Structural breakout — MediaTek is differentiating from pure-momentum AI names by securing long-term design wins. Gaining on a day when semis are down 10%+ signals the market is pricing in durable competitive positioning.

↓ 2317 -3.35%

Large-cap · 259.5 (local)

Why: Hon Hai (Foxconn) fell 3.4% as the US tech hardware selloff weighed on contract electronics manufacturers. As Apple and AI server assembler, it tracks US mega-cap tech sentiment closely.

Pattern: Macro-driven pullback in line with the regional tech de-rating. Hon Hai’s high correlation to US Big Tech capex makes it a direct read-through — the move is thematic, not company-specific.

India (NSE)

↑ HINDUNILVR +0.10%

Large-cap · 2165 (local)

Why: Hindustan Unilever was essentially flat at +0.1% — consumer staples acted as a defensive anchor while India’s IT sector took the brunt of the Accenture-triggered selloff.

Pattern: Textbook defensive hold during a growth-stock rout. Consumer staples flat performance in a -1% Nifty session signals institutional rotation to safety — not a momentum signal in either direction.

↓ INFY -3.16%

Mega-cap · 1032 (local)

Why: Infosys dropped 3.2% extending its post-Accenture guidance-cut selloff. The Nifty IT index hit a three-year low as weak discretionary tech spending and muted fiscal 2027 guidance weighed on Indian IT outsourcers.

Pattern: Momentum breakdown with fundamental confirmation — Accenture’s guidance cut validates the demand slowdown thesis. Infosys hit a 52-week low last week; this follow-through selling suggests more capitulation ahead before mean-reversion.

New Zealand (NZX)

↑ MEL +1.69%

Mid-cap · 6 (local)

Why: Meridian Energy rose 1.7% — no clear catalyst. New Zealand utility stocks tend to attract flows during global risk-off sessions given their defensive yield characteristics and local-economy insulation.

Pattern: Defensive relative strength — utilities gaining on a red regional day is a classic risk-off rotation signal. Isolated to NZ market dynamics rather than part of a broader breakout theme.

↓ FPH -1.60%

Large-cap · 37.61 (local)

Why: Fisher & Paykel Healthcare fell 1.6% — no company-specific catalyst. The medical devices maker likely drifted lower in sympathy with global risk-off sentiment despite its defensive healthcare positioning.

Pattern: Mild pullback within a longer-term uptrend. FPH’s premium valuation makes it sensitive to broad de-risking even as a healthcare name — check whether NZD weakness added FX translation pressure.

Reading the Session

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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