South Korean Kospi Plunges Nearly 10% on Tech Selloff and Regulatory Warnings
In late June 2026, South Korea’s Kospi index suffered a series of steep declines, including a 9.99% single-day drop on June 23, triggered by regulatory warnings on leveraged ETFs. Subsequent trading halts occurred on June 25 and 26 as chipmaker-led selloffs erased gains amid fears that AI-driven profits were peaking. The index fell as much as 9% intraday, with circuit breakers activated multiple times. The volatility spread from US tech stock weakness, highlighting South Korea’s vulnerability to global semiconductor demand shifts.
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SK Hynix Drops Nearly 11% as KOSPI Triggers 37th Sidecar of 2026
On July 16, 2026, SK Hynix shares plunged 10.95% in Seoul, leading a broader Asian chip selloff that dragged the KOSPI into its 37th sidecar of the year. Samsung Electronics fell 7.33%, and the KOSPI opened down 4.45%, deepening to a low of 6,753. The Korea Exchange triggered a sell-side sidecar at 9:10 a.m., suspending program sell orders for five minutes after KOSPI 200 futures dropped 5.22%. The selloff spread to Japan, with Advantest, SoftBank, and Tokyo Electron all falling sharply, tracking an overnight slump on Wall Street where Micron Technology dropped 7.94%. Despite strong earnings from ASML, analysts attribute the pullback to the crowded AI-driven semiconductor trade, which now makes up roughly 20% of the S&P 500. South Korean regulators met to discuss the growing market impact of leveraged single-stock ETFs. The article questions whether this is a one-day reversal or a deeper correction.
Yahoo FinanceAsian Stocks Fall as Kospi Hit by Selloff in Chips: Markets Wrap
Asian stock markets declined sharply, led by South Korea's Kospi index which fell 6.6% amid a broad selloff in semiconductor stocks. The downturn was driven by growing investor concerns over the artificial intelligence sector, which weighed heavily on technology shares across the region. Taiwan's TSMC earnings report was closely watched as a key indicator for the chip industry. Meanwhile, bond markets rallied on cooler inflation data, and oil prices slipped. The selloff reflects heightened volatility in global markets as traders reassess AI-related valuations and macroeconomic conditions.
Top stories - Google NewsAsian stocks decline as South Korea’s Kospi drops 2.7% amid AI stock rout
On July 14, 2026, Asian stock markets declined sharply, led by South Korea's Kospi index which fell 2.7% amid a rout in AI-related stocks. The sell-off spilled over into US markets, with SK Hynix's American depositary shares dropping 9.3%. MSCI's broad gauge for Asia Pacific shares fell 0.6%. The decline was driven by concerns over the AI sector, with chip stocks particularly affected. The article, published by The Business Times Singapore, highlights the interconnectedness of global markets and the impact of AI stock volatility on regional indices.
The Business TimesUS stocks end lower as Iran tensions dampen risk appetite; chipmakers drop
Wall Street closed lower on Monday, July 13, 2026, as escalating tensions with Iran weighed on investor risk appetite, particularly hitting technology and chipmaker stocks. The decline was led by South Korean chipmaker SK Hynix, which plunged 9.3% following its Nasdaq debut the previous Friday. All three major US indices ended in negative territory, reflecting broader market caution amid geopolitical uncertainty. The report from The Business Times Singapore highlights the impact of geopolitical risks on financial markets, with the chip sector facing additional pressure.
The Business TimesMemory chip stocks slump as SK Hynix shares tumble after record-breaking IPO
Memory chip stocks fell sharply across U.S. and Asian markets on July 13, 2026, led by SK Hynix, whose American depository shares dropped 8.9% just days after its record $26.5 billion U.S. IPO. In South Korea, SK Hynix plunged 15% and Samsung fell 10.5%, triggering a temporary trading halt on the Kospi. The selloff extended to the Nasdaq, with Micron down 4.8%, Sandisk down 10.7%, and Western Digital down 5.9%. Despite strong recent earnings—operating profit up 405% YoY—analysts cite concerns over front-loaded AI demand, cyclicality, and valuation. A report from Korea Investment & Securities projected SK Hynix's quarterly operating profit may trail forecasts by 8%, citing slower price growth for high-bandwidth memory compared to conventional chips. Strategists noted confusion over fair value and memory demand outlook, contributing to volatility.
Yahoo FinanceSK Hynix Shares Slide After South Korea Sell-Off; Expert Warns of 'Vicious Circle'
Shares of South Korean memory chip giant SK Hynix slumped in their first full day of U.S. trading on Monday, falling 9% after a record 15% drop in local trading. The sell-off dragged down competitor Samsung (down 11%) and the KOSPI index (down 9%), spilling into U.S. markets where Micron, SanDisk, Western Digital, and Marvell also declined. The Roundhill Memory ETF lost over 9%. The downturn follows a blistering rally in chip stocks driven by AI demand, but analysts warn that sky-high expectations have made the sector vulnerable. A Korea Investment & Securities report predicting SK Hynix's Q2 operating profit would fall short of estimates despite a 550% surge sparked the sell-off. Analyst Nic Puckrin called investor expectations 'irrational' and warned of a dangerous precedent. SK Hynix's Korean shares are down over 35% from last month's record high, and the PHLX Semiconductor Index has fallen more than 15% from recent highs.
Yahoo FinanceMemory Stocks Plunge After SK Hynix Weak Outlook
Memory and storage stocks experienced a sharp selloff on Monday, July 13, 2026, after South Korean brokerage KIS published a Q2 2026 profit estimate for SK Hynix that was 8% below consensus, citing slower-than-expected HBM4 shipments. SK Hynix stock fell 15% in Asia, its largest single-day drop ever, and the KOSPI dropped 9%, triggering a trading halt. In sympathy, U.S. memory names Micron Technology, SanDisk, and Western Digital each fell 6%, despite year-to-date gains exceeding 200%. The Roundhill Memory ETF (DRAM) fell 9%, with Samsung, SK Hynix, and Micron as its top holdings. Seagate Technology also dropped 4%. The selloff is seen as profit-taking and a signal that the memory super-cycle's momentum may be cooling, amid broader concerns about AI capital spending and renewed U.S.-Iran headlines.
Yahoo FinanceSK Hynix stock falls record 15% after Nasdaq debut
SK Hynix shares plunged 15.4% in Seoul on Monday, July 13, 2026, marking the largest single-day decline in the company's history. The sell-off followed the chipmaker's blockbuster Nasdaq debut on Friday, where its ADRs surged 12.8% in the first session. The broader Kospi index fell 9%, triggering a 20-minute trading halt. Samsung Electronics also dropped nearly 11%. Analysts attributed the decline to profit-taking after the highly anticipated listing, disappointment over HBM4 chip shipment volumes, and a note suggesting quarterly operating profit could be 8% below expectations. Despite the drop, SK Hynix's market value slipped to $875 billion from over $1 trillion earlier this year, though shares have still roughly sextupled over the prior twelve months.
Yahoo FinanceSK Hynix stock falls record 15% after Nasdaq debut
SK Hynix shares plunged 15.4% in Seoul on Monday, July 13, 2026, marking the largest single-day decline on record, following the chipmaker's blockbuster Nasdaq debut the previous week. The broader Kospi index fell 9%, triggering a 20-minute market-wide trading halt. Samsung Electronics also dropped nearly 11%, and overseas investors exited approximately 1.7 trillion won ($1.1 billion) in Kospi-listed shares, mostly from SK Hynix. The company's U.S.-listed ADRs fell 9.2% to $152.50 in pre-market trading, maintaining a 37% premium over Seoul-listed shares. Analysts attributed the decline to profit-taking after the highly anticipated listing, disappointment over HBM4 chip shipment volumes, and a note suggesting quarterly operating profit could be 8% below expectations. Despite the drop, SK Hynix's market value stood at $875 billion, down from the $1 trillion mark reached earlier this year, though shares have still roughly sextupled over the prior twelve months.
Yahoo FinanceSouth Korean stocks plunge, sparking fresh tech sell-off fears
South Korea's blue-chip Kospi index plunged 8.9% on Monday, falling to 6,806.9 points and dropping more than a fifth from its June high, as investors cashed out of chipmaker SK Hynix following its Nasdaq debut last week. SK Hynix shares fell 15.3%, while rival Samsung Electronics dropped 9.5%, triggering a trading halt. The sell-off was driven by profit-taking after SK Hynix raised $26.5bn in the largest US listing by a foreign company. Analysts warned that the company's 'heady valuation' and front-loaded AI demand could prove cyclical, fueling broader anxiety over the tech sector's sustainability. Investors are trimming exposure to Asian chipmakers amid concerns that AI adoption and returns are slower than expected, leading to a wave of sell-offs in recent months.
City AMSK Hynix Plunges After Nasdaq Debut Amid Diminishing Earnings Optimism
SK Hynix experienced a significant stock price decline following its Nasdaq debut, driven by waning optimism about its earnings prospects. The drop in SK Hynix shares, along with those of rival Samsung Electronics, contributed to a 9% plunge in South Korea's Kospi index. The article, published by The Business Times Singapore on July 13, 2026, highlights the negative market reaction to the chipmaker's listing and the broader impact on the Korean stock market.
The Business TimesSK Hynix Plunges After Nasdaq Debut Amid Diminishing Earnings Optimism
SK Hynix shares tumbled more than 15% following its Nasdaq debut, as investors unwound gains from a previous scorching rally. The decline was driven by diminishing earnings optimism. The drop in SK Hynix shares, along with those of rival chipmaker Samsung Electronics, contributed to a 9% plunge in South Korea's stock market. The article was published by The Business Times Singapore on July 13, 2026.
The Business TimesWhy the world’s best-performing stock market this year fell into bear territory
South Korea's Kospi index, which was the world's best-performing stock market in 2026, entered bear territory after falling more than 5% on Wednesday, bringing it 20% below its June 19 record high. The sharp reversal is attributed to global investors' growing skepticism about artificial intelligence plays and extreme market concentration, with chipmakers Samsung Electronics and SK Hynix accounting for over half of the index's weighting. Analysts say the correction is driven more by positioning and profit-taking than by deteriorating fundamentals, noting strong earnings from Samsung and rising memory prices. Despite the drop, the Kospi remains up over 70% year-to-date, and some experts view the pullback as a healthy reset rather than a fundamental change in the AI cycle.
US Top News and AnalysisKOSPI Rebounds Nearly 4% in Early Trading, Escaping Bear Market Territory
South Korea's KOSPI index rebounded nearly 4% in early trading on July 9, 2026, recovering from a 5.35% plunge the previous day that had pushed it into bear market territory. The index peaked at 7,539, climbing back above the 20% decline threshold from its June 22 record of 9,114.55. The volatility was driven by sharp swings in chipmaker stocks, particularly Samsung Electronics and SK Hynix, amid AI demand concerns and worries over leveraged single-stock ETFs. South Korea's Finance Minister Koo Yun-cheol pledged to monitor volatility risks tied to leveraged ETFs. Analysts pointed to spillover from the prior session's weakness and slowing memory-price growth. The sustainability of the rebound remains uncertain, hinging on chipmaker trading performance through the day.
Yahoo FinanceSouth Korea to closely watch risks around stock market volatility
South Korea announced it will closely monitor risks related to stock market volatility after the Kospi index triggered a circuit breaker for the sixth time in 2026. The Kospi fell as much as 4% in early trading on Wednesday, reaching its lowest level since May 20, before recovering losses and turning higher. The repeated circuit breaker events highlight significant market instability, prompting government attention to potential systemic risks.
The Business TimesAI Chip Sell-Off Driven by Liquidity Crisis, Not Demand Collapse
On July 7, 2026, global equity markets experienced a severe shock as South Korea's KOSPI index dropped approximately 8%, triggering market-wide trading halts for the second time in months. The sell-off rapidly spread to U.S. semiconductor stocks, including NVIDIA and Broadcom. However, analysis suggests the downturn is driven by a liquidity crisis originating from South Korean retail investors' heavy margin debt usage, not a collapse in AI demand. Forced liquidations in Seoul triggered cross-border margin cascades, with fund managers selling liquid U.S. holdings to raise cash. Samsung Electronics' record profit guidance failed to prevent its stock decline, underscoring the disconnect. The article argues that patient investors may find opportunities in dominant AI hardware names at liquidity-driven discounts before fundamentals reassert themselves.
Yahoo FinanceAsian stocks fall on tech weakness; Korean chipmakers Samsung, SK Hynix retreat
Asian stock markets declined on Tuesday, with the MSCI Asia Pacific Index falling 0.6%, led by weakness in technology stocks. South Korea's Kospi index dropped sharply by 4.3%, driven by losses in major chipmakers Samsung and SK Hynix. Despite Samsung reporting a quarterly profit that beat expectations and surged 19-fold due to strong memory chip demand, its shares tumbled over 6%. The broader tech sector weakness weighed on regional markets, reflecting investor concerns about the sustainability of the semiconductor rally and broader economic headwinds.
The Business TimesSamsung, SK Hynix fall over 8% as Asian stocks decline on tech weakness
On July 7, 2026, Asian stock markets experienced significant declines driven by weakness in the technology sector. The MSCI Asia Pacific Index fell 1.2%, while South Korea's Kospi index plunged 6.7%. Major South Korean tech giants Samsung and SK Hynix both dropped over 8%. According to hedge fund Petra Ca, Samsung's decline after reporting positive earnings suggests investors are focused on the long-term trajectory of the memory chip cycle rather than short-term results. The broader technology sector weakness appears to be the primary catalyst for the regional market downturn.
The Business TimesAsian stocks fall on tech weakness; Samsung, SK Hynix over 8% down
Asian equities fell sharply on July 7, 2026, driven by weakness in technology stocks. The MSCI Asia Pacific Index declined 1.2%, while South Korea's Kospi index plunged 6.7%. Major semiconductor firms Samsung and SK Hynix each dropped over 8%. According to hedge fund Petra Capital Management, Samsung's decline following positive earnings suggests investors are focusing on the longer-term trajectory of the memory cycle rather than short-term results. The sell-off reflects broader concerns about the tech sector's outlook in the region.
The Business TimesAsian stocks fall on Korean chip sell-off, oil dips; SK Hynix, Samsung down 8%
On July 2, 2026, Asian stock markets experienced a significant decline, led by a sharp sell-off in South Korean semiconductor stocks. South Korea's Kospi index fell nearly 6%, dragging the broader MSCI Asia Pacific Index down by 1.2%. Major chipmakers SK Hynix and Samsung both dropped by approximately 8%. The decline was triggered by reports that Apple is in talks to purchase chips from two Chinese semiconductor makers, raising concerns about reduced demand for Korean chip exports. Oil prices also dipped during the session. The report was published by The Business Times, a Singapore-based media outlet, and is attributed to Bloomberg.
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