# Asian markets tumble as Kospi falls over 5% > Source: > Published: 2026-06-05 07:54:48.389721+00:00 # Asian markets tumble as Kospi falls over 5% Asian equities slid on June 5, led by South Korea's **Kospi**, which fell more than **5%** in early trading after Broadcom's outlook disappointed Wall Street, the Korea Herald reports. The index opened down 3.66% and dropped to about **8,190** - below the 8,100 mark - triggering a sell-side sidecar that briefly halted program selling. Chipmakers led the rout: **Samsung Electronics** fell about **6.4%** and **SK hynix** about **8.18%** (Korea Herald). The trigger was Broadcom's fiscal-Q2 report: its shares dropped roughly **13%** and it shed about **$300 billion** in market value after AI-chip guidance (third-quarter sales near **$16 billion**) missed expectations, Euronews and CNBC report. Nasdaq 100 futures and MSCI's Asia gauge also retreated as investors rotated out of the AI trade, even as the Dow closed at a record. ### What happened South Korea's Kospi led an Asian selloff on June 5, falling more than 5% in early trading, the Korea Herald reports. The index opened at 8,323.2 (down 3.66%) and slid to about 8,190.25 by 9:15 a.m. (down roughly 5.2%), dropping below the 8,100 mark. A sell-side sidecar was triggered at 9:08 a.m., briefly halting program sell orders to curb volatility. Foreign investors were net sellers of about 564.8 billion won on the main board. ### What triggered it The proximate trigger was Broadcom's fiscal second-quarter report. Its shares fell roughly 13% and the company shed about $300 billion in market value after its AI-chip guidance - third-quarter AI sales of around $16 billion, below analyst estimates near $17.2 billion - missed elevated expectations (Euronews; CNBC). The disappointment rippled through semiconductors: in Seoul, Samsung Electronics fell about 6.4% to 329,000 won and SK hynix about 8.18% to 2.11 million won, with SK Square (-8.82%) and Hyundai Motor (-5.29%) also lower (Korea Herald). ### Market backdrop CNBC and Bloomberg report that Nasdaq 100 futures retreated and MSCI's Asia gauge fell as investors rotated out of AI-linked stocks. U.S. benchmarks had diverged the prior session, with the Dow Jones Industrial Average closing at a record and the S&P 500 firmer even as chip names weakened. Korean chip stocks had rallied strongly over the past year on the AI memory boom, leaving the market unusually exposed to a shift in AI sentiment. ### Editorial analysis The move fits a familiar pattern: concentrated gains in a thematic trade can reverse sharply when a large supplier issues weak forward guidance. Markets like South Korea's, where a handful of chip and memory names carry a large share of capitalization, tend to see amplified index swings. For practitioners, equity volatility driven by hardware-supply signals can feed into procurement and capital-budgeting uncertainty; watchers of DRAM and NAND pricing and vendor capex may find higher signal value in the coming weeks. ### What to watch - •Follow-on guidance and earnings commentary from major semiconductor suppliers; Broadcom and Micron are immediate watch points (CNBC). - •Kospi flows and won exchange-rate moves for signs of contagion beyond tech (Korea Herald). - •Whether the AI-trade rotation deepens or stabilizes across Nasdaq and Asian chip names. ## Scoring Rationale A roughly $300 billion single-day wipeout in Broadcom plus a sidecar-level plunge in Korea, the core AI-memory market, marks a significant reassessment of the AI hardware trade with direct read-through to semiconductor capex and ML infrastructure pricing. The scale and circuit-breaker dynamics justify a solidly notable score, short of an industry-shaking structural event. Practice with real FinTech & Trading data 90 SQL & Python problems · 15 industry datasets [Active Verified Users by Income TierEasy](/problems/sql/active-verified-users-by-income) [Technology Stocks with High BetaMedium](/problems/sql/technology-stocks-with-high-beta) [Portfolio Performance ScorecardHard](/problems/sql/portfolio-performance-scorecard) 250 free problems · No credit card [See all FinTech & Trading problems](/problems/datasets/fintech)