# Asian Stocks Plunge on AI Skepticism

> Asian stocks tumble as AI investment doubts trigger 4% KOSPI drop and 7% SK Hynix plunge.
- Title: Asian Stocks Plunge on AI Skepticism · BigGo Finance
- Summary: Asian stocks tumble as AI investment doubts trigger 4% KOSPI drop and 7% SK Hynix plunge. Asian stock markets fell 4% on KOSPI and 7% on SK Hynix due to AI…
- Keywords: kospi, sk hynix, ai investment, us treasury yield, semiconductor stocks, tech earnings, msci asia-pacific index, nikkei 225, topix, s&p 200, resonac holdings, fujikura
- Source: BigGo Finance — https://finance.biggo.com/news/e483075e-073d-4d4e-bc3a-32335062fd70
- Author: BigGo Finance
- Published: 2026-10-20T02:35:24+00:00
- Read time: 1 min
- Topics: kospi, sk hynix, ai investment, us treasury yield, semiconductor stocks, tech earnings, msci asia-pacific index, nikkei 225, topix, s&p 200, resonac holdings, fujikura
## Asian Stocks Plunge
Major Asian stock markets fell in unison on the 20th, failing to extend the previous day's tech-led rebound in New York.
## KOSPI Tumbles 4%
South Korea's KOSPI plunged more than 4% in early trading, the weakest performance among Asia-Pacific benchmarks.
## SK Hynix Sinks 7%
SK Hynix cratered over 7% to approach its lowest level since April, while Samsung Electronics fell more than 3%.
## Elice Plunges 32%
Elice, making its trading debut, plunged as much as 32% intraday, further denting investor sentiment.
## MSCI Asia-Pacific Index Falls
The MSCI Asia-Pacific Index fell around 1%, with eight of its 11 sub-sectors declining.
## Japanese Markets Decline
Japan's Nikkei 225 dropped 1% and the TOPIX fell 0.9% as AI hardware stocks sold off.
## Semiconductor Stocks Drop
Resonac Holdings plunged 6.43%, Fujikura fell 6.34%, and SoftBank Group dropped 6.34% in semiconductor stocks.
## U.S. Treasury Yields Rise
The U.S. 10-year Treasury yield held at elevated levels around 5.13%, 5.14%, extending a 6, 7 basis point rise.
## Tech Earnings Test
U.S. mega-cap tech earnings, including Meta Platforms, are expected to test the AI rally's durability this week.
## Market Sentiment Shift
Risk-aversion sentiment resurfaced as doubts over AI capital expenditure profitability persisted.
## Key takeaway

Asian stock markets fell 4% on KOSPI and 7% on SK Hynix due to AI investment skepticism and high U.S. Treasury yields.