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How AI Investment Concerns Drove Japan and South Korea’s October 19 Selloff
AI funding worries and doubts about eventual returns weighed on Japan and South Korea’s technology heavy markets on October 19. The pressure followed sharp prior week losses: the Nikkei fell 5.4%, South Korea’s market lost more than 14%, and the Philadelphia Semiconductor Index dropped 11.4%.[18]
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Key takeaways
- AI funding worries and doubts about eventual returns weighed on Japan and South Korea’s technology heavy markets on October 19.
- The pressure followed sharp prior week losses: the Nikkei fell 5.4%, South Korea’s market lost more than 14%, and the Philadelphia Semiconductor Index dropped 11.4%.[18]
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openai.comCreate a landscape editorial hero image for this Studio Global article: How did concerns about the cost, financing and eventual returns of AI investment drive the selloff in Japanese and South Korean stocks on Mo. Article summary: The selloff reflected a reassessment of whether enormous AI spending could be financed affordably and ultimately earn adequate returns: concerns about funding needs coincided with rising interest-rate expectations, putti. Topic tags: general, general web, news. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermarks, charts with fake numbers
Concerns that the AI buildout may be expensive to finance—and may not earn enough to justify that spending—put pressure on technology stocks in Japan and South Korea on Monday, October 19. The declines extended a rough week for chip-heavy markets, as investors weighed AI companies’ funding needs against higher borrowing costs and uncertain returns.1
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How the markets moved on October 19
The Kospi opened at 5,488.41, down 179.64 points, or 3.17%. It later pared its decline: one report put the index 1.18% lower at 9:12 a.m. local time.4 A separate Reuters trading snapshot reported South Korea’s market down 1.6%, while Japan’s Nikkei 225 was down 2.0%.
18 These are intraday readings, not closing results.
The pressure came after substantial weekly losses. Reuters reported that the Nikkei had fallen 5.4% the previous week and South Korea’s market had shed more than 14%. The Philadelphia Semiconductor Index lost 11.4% that week, its longest losing streak since 2008, according to Reuters.18
Why financing and returns became the focus
Investors were uneasy about the scale of AI-related funding needs, particularly where expansion depends on borrowing. The market concern was not simply how much companies are spending, but whether future revenue and profits will make that spending worthwhile.1
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Higher interest rates can raise financing costs for projects such as data-centre construction. They can also reduce the present value investors assign to profits expected further in the future. That leaves AI infrastructure companies and the chip suppliers relying on their investment plans exposed to both more expensive funding and tougher scrutiny of projected returns.1
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The rate backdrop had already intensified the market’s concerns. On October 15, Reuters reported that sticky U.S. inflation had increased expectations of further Federal Reserve rate hikes, as technology losses spread to Korean chipmakers.19 The October 19 selloff therefore reflected overlapping worries about AI spending and the cost of financing it—not proof that demand for AI had collapsed.
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Chipmakers and SoftBank were exposed to the repricing
Semiconductor-heavy markets bore the brunt of the reassessment. Samsung Electronics and SK Hynix were among the Korean chipmakers caught in the previous week’s technology-led selloff; Reuters reported steep losses for both during the October 15 market rout.19 A report on the broader selloff also identified Kioxia and SoftBank among Japan’s notable losers that Thursday.[24 in thread sources]
SoftBank’s exposure helps explain why shifts in AI sentiment matter to investors. The company said its cumulative investment in OpenAI reached $64.6 billion after completing a final investment tranche on October 1.3 Reports put its expected OpenAI stake at about 13%.
8 That scale of investment makes questions about AI financing and commercial returns particularly relevant to how investors assess SoftBank, although the supplied reporting does not establish the company’s exact share-price move on October 19.
Revenue figures also require care. Reporting put OpenAI’s annualized revenue at around $50 billion at the end of September, while a separate report described an expectation of $70 billion or more by year-end. Those figures refer to different timings, and reporting noted differences in how revenue flowing through cloud partners was counted; they should not be treated as directly comparable without that context.2
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What the selloff does—and does not—show
The October 19 declines fit a broader repricing of AI-linked stocks as investors reconsidered funding costs, valuations and the profits expected from the buildout. They do not, on their own, demonstrate that AI demand has disappeared or that the investments will fail. The key uncertainty is whether expected returns can justify the scale and cost of the capital being committed.1
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AI funding worries and doubts about eventual returns weighed on Japan and South Korea’s technology heavy markets on October 19.
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AI funding worries and doubts about eventual returns weighed on Japan and South Korea’s technology heavy markets on October 19. The pressure followed sharp prior week losses: the Nikkei fell 5.4%, South Korea’s market lost more than 14%, and the Philadelphia Semiconductor Index dropped 11.4%.[18]
Sources
ajupress.comAI debt scare knocks Seoul and Tokyo stocks at open | Aju Press
finance.yahoo.comAsia stocks turn higher, tech recovers as OpenAI revenue ...
reuters.comAsian stocks skid, Wall Street and bonds aided by oil slip
mt.co.krKOSPI Opens Lower on AI Sector Jitters…Decline Narrows as Foreign and Institutional Investors Buy the Dip - MoneyToday