South Korea’s stock rout raises doubts over durability of chip windfall



Briefings South Korea’s stock rout raises doubts over durability of chip windfall Five-day KOSPI sell-off exposes fiscal risks as investors question future semiconductor profits despite record earnings KOREA PROOctober 14, 2026 SHARE COPY LINK FACEBOOK X LINKEDIN MASTODON A semiconductor chip (Sept. 1, 2022) against a backdrop of stock market charts (April 25, 2025) \| Image: Unsplash, Unsplash, edited by Korea Pro South Korean stocks plunged for a fifth consecutive trading session Tuesday, with the benchmark KOSPI falling as much as 7.4% to 5,914.35 as investors sold semiconductor shares amid growing concerns about the sustainability of the artificial intelligence (AI) boom. The Korea Exchange suspended automated sell orders for five minutes in the morning after futures tracking major Korean stocks fell more than 5%. The sell-off followed reports of technological advancesby Chinese memory manufacturer ChangXin Memory Technologies and warnings about the financing needed to sustain AI infrastructure investment. Samsung Electronics and SK Hynix led the losses despite Samsung’s preliminary third-quarter operating © Korea Risk Group. All rights reserved. No part of this content may be reproduced, distributed, or used for commercial purposes without prior written permission from Korea Risk Group. LATEST ANALYSIS 01South Korea’s won faces a new test as foreign bond buying loses momentum 02Trump’s Russian diesel deal may leave South Korea’s refining boom intact 03Trump’s Alaska LNG claim shows who really runs the US-South Korea alliance 04South Korea’s missile defense push raises new questions over wartime stocks 05South Korea bank hacks expose weak links beyond core financial systems 06Lee-Zelensky feud exposes South Korea’s widening Ukraine policy dilemma 07Lee Jae Myung’s ‘pacemaker’ strategy tests South Korea’s leverage with Trump 08Trump’s Korea investment victory lap masks safeguards Seoul still controls

Briefings

South Korea’s stock rout raises doubts over durability of chip windfall

Five-day KOSPI sell-off exposes fiscal risks as investors question future semiconductor profits despite record earnings

KOREA PROOctober 14, 2026

South Korea’s stock rout raises doubts over durability of chip windfall

A semiconductor chip (Sept. 1, 2022) against a backdrop of stock market charts (April 25, 2025) | Image: Unsplash, Unsplash, edited by Korea Pro

South Korean stocks plunged for a fifth consecutive trading session Tuesday, with the benchmark KOSPI falling as much as 7.4% to 5,914.35 as investors sold semiconductor shares amid growing concerns about the sustainability of the artificial intelligence (AI) boom. The Korea Exchange suspended automated sell orders for five minutes in the morning after futures tracking major Korean stocks fell more than 5%.

The sell-off followed reports of technological advancesby Chinese memory manufacturer ChangXin Memory Technologies and warnings about the financing needed to sustain AI infrastructure investment. Samsung Electronics and SK Hynix led the losses despite Samsung’s preliminary third-quarter operating

South Korea’s stock rout raises doubts over durability of chip windfall

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