Asia's Chip Rout Deepens: Kospi Halts Trading as Hot Inflation Revives Rate-Hike Bets
Kospi halts trading after clearing an 8% slide
South Korea's bourse operator suspended trading in Kospi-listed shares for 20 minutes starting at 12:38 p.m. local time on Thursday, after the benchmark fell more than 8% from the previous close, Yonhap reported. The index traded near 5,539 at one point, down about 7.8% on the day; it opened more than 5% lower, triggering a sell-side sidecar halt early in the session. The move stretched the Kospi's losing streak to seven straight sessions, its longest since September 2024.
Samsung and SK Hynix absorb the heaviest selling
A 3.7% inflation print rewrote the rate maths
Wall Street's overnight slide set the tone
The deeper worry: who pays for the AI buildout
Broadcom chief executive Hock Tan compared AI investors to casino gamblers and warned that financing the buildout could become a bigger problem than chip shortages; Intel's CEO has likewise flagged access to capital as a headwind. Competition added to the pressure earlier: on 13 October, China's ChangXin Memory Technologies (CXMT) claimed a breakthrough in memory technology, dragging the Kospi to a 5.46% close at 6,035.35 that day, with Samsung down 7.39% and SK Hynix down 10.09%. Korea's total market value slipped below 5,000 trillion won.
Seoul had already moved against leverage
Korea's Financial Services Commission has spent months tightening the plumbing. From 1 October, brokers were limited to extending credit equal to 90% of equity capital; a 15% concentration limit on single stocks takes effect on 19 October; minimum margin requirements are due to rise from 45% to 50% within the year. FSC chairman Lee Eok-won ordered regulators on 1 October to deploy market-stabilisation measures promptly if instability spreads and to keep bond and funding-market backstops rapidly expandable. The Bank of Korea's September financial stability report singled out concentrated, leveraged trades linked to Samsung Electronics and SK Hynix as a volatility amplifier, and the FSC chief publicly apologised on 8 October over the single-stock leveraged ETF episode.
Energy importers face a second front
Higher oil is a separate tax on net importers Korea and Japan. Brent traded near $106 a barrel as Houthi attacks on Saudi Arabia fanned supply concerns, even though WTI and Brent had fallen earlier in the week, to $92.66 and $105.52 on 13 October.
Bulls and bears split on a pause versus a bursting bubble
Lazard's Ronald Temple argued that broadening inflation pressures leave the Fed "increasingly at risk of falling behind the curve", while Regan Capital's Skyler Weinand expects a hold in October and hikes resuming in December. Vital Knowledge's Adam Crisafulli told CNBC the sell-off "reflected extreme positioning imbalances that have further to unwind", making a sharp V-shaped rebound unlikely. Ray Dalio has called the AI boom a "classic bubble" approaching its burst point, and Panmure Liberum strategist Joachim Klement targets the S&P 500 at 5,000 by end-2027 — roughly 36% below its 7 October close of 7,801.77. Michael Burry is betting against Micron and Nebius via put options.
What to watch: TSMC, the Fed, and memory pricing
TSMC reports third-quarter results on Thursday. LSEG's SmartEstimate of 16 analysts expects net profit up about 65% year on year to NT$746.3 billion (roughly $23.4 billion), a sixth straight record, on revenue of NT$1.49 trillion — up 50%. The company has guided 2026 capital spending at $60bn–$64bn. The key is whether capex and the 2027 outlook can keep the "AI demand is real" narrative intact. Two other dates matter: the Fed's 27–28 October meeting, with the decision due on the 28th, and the pace at which CXMT's memory capacity actually lands.
