# Nasdaq Has Its Worst Day in Three Months and CoreWeave Falls 15.5%; KOSPI Drops as Much as 7.77% the Next Morning

Times of AI Desk · 2026-10-15 · Industry

[https://timesof.ai/2026/10/ai-financing-rout-nasdaq-sox-coreweave-kospi-7pct](https://timesof.ai/2026/10/ai-financing-rout-nasdaq-sox-coreweave-kospi-7pct)

> A hotter US inflation print and souring sentiment toward AI financing sent the Nasdaq down 1.9% on Oct. 14, its biggest fall in three months, Reuters reported, with the SOX chip index down 4.2% and CoreWeave down 15.5%. In Seoul on Oct. 15 the KOSPI fell as much as 7.77% by 10:30 a.m., Korea JoongAng Daily reported.

Investors are now repricing the AI trade through its funding, not its demand, according to Reuters' Jamie McGeever, who wrote on **Wednesday, October 14** that sentiment toward AI financing "is souring. Rapidly." US stocks fell sharply that day on surprisingly strong September inflation data and those financing worries, Reuters reported, with the **Nasdaq** down **1.9%**, its biggest fall in three months. The inflation figures put a Federal Reserve rate hike later this month back on the table, according to Reuters.

## Wall Street on October 14

The **Nasdaq Composite** closed down **1.88%** at 26,692.87 and the **S&P 500** fell **1.11%** to 7,718.94, CNBC reported. Reuters said the **SOX** chip index fell **4.2%**, down for a sixth day in its longest losing streak in nearly two years. **CoreWeave** fell **15.5%**, **Dell** 11%, and **Oracle** and **Marvell** 9%, according to Reuters.

US AI-related corporate bonds fell sharply, many to new lows, Reuters reported. CoreWeave's 9.75% bond maturing in 2031 yielded **16%** and fell to a new low in price, and Oracle's 4.9% bond maturing in 2033 registered a record low, according to the column.

The same day, **Gartner** forecast that more than **$3.5 trillion** of AI infrastructure spending could be exposed to impairment by the end of 2030 if AI providers keep their current pace of capital spending. It also predicted that cost pressure and a lack of a differentiating business model will force **over 80%** of neocloud providers to cease independent operations by 2030. Those are Gartner's projections.

**Dan Ives** of Yorkville Ives argued in a note that "rates are a financing question, not a demand question," CNBC reported. "What would change our view is a demand signal, not a rate signal," he said.

## Seoul and Tokyo on October 15

The **KOSPI** opened **5.59%** lower at 5,673.01 on Thursday and was down **7.77%** at 5,539.51 as of **10:30 a.m. Seoul time**, Korea JoongAng Daily reported. Sell-side sidecar curbs were triggered at 9:07 a.m. on the KOSPI and 9:12 a.m. on the KOSDAQ, according to the paper. Foreign investors were net sellers of 1.92 trillion won ($1.4 billion) of shares as of 10:30 a.m., it said. The BBC put the KOSPI **7.6%** lower in morning trading. These are intraday levels, not closes.

Stock moves varied by outlet and time. JoongAng Daily, in a report published at 11:34 a.m. Seoul time, had **Samsung Electronics** down **9.05%** and **SK hynix** down **10.71%**. CNBC reported SK Hynix down more than 10% and Samsung down 7.1%, and **SoftBank Group** down **7.9%** in Tokyo, along with Advantest down 6.9%.

JoongAng Daily also cited concern about memory supply from China's CXMT and US consumer prices that rose 3.7% from a year earlier in September. **Park Yeon-ju** of Mirae Asset Securities told the paper the biggest factor was concern over AI returns, "as Anthropic's third-quarter revenue growth slowed from the previous quarter." She added that the fall was "excessive relative to earnings." We cover the [Anthropic figures attendees reported](https://timesof.ai/2026/10/anthropic-q3-revenue-16-8b-adjusted-profit-investor-day) separately.

Broadcom's Hock Tan had [warned on October 12](https://timesof.ai/2026/10/hock-tan-capital-biggest-constraint-ai-investors-casino) that capital may be AI's biggest constraint. Seoul's index had [rebounded early on October 14](https://timesof.ai/2026/10/kospi-chip-selloff-samsung-sk-hynix-ai-bubble-oct12) after five sessions of chip selling.

## Limits

- Seoul and Tokyo figures are intraday snapshots at different times and were still moving when this was written; no closing levels are included.
- Reuters' McGeever column is analysis; the attribution of the selloff to AI financing versus inflation is the outlets' and analysts' framing.
- Gartner's impairment and neocloud figures are forecasts.
- Korea JoongAng Daily says its article was translated from Korean with AI tools and edited by its newsroom; quotes are as published in English by the paper.
- AP and Yonhap market pages were not used; the Bloomberg and Financial Times pages could not be opened.

## Sources

- [Reuters via Investing.com: Trading Day: Tech melt (October 14, 2026)](https://www.investing.com/news/economy-news/trading-day-tech-melt-4950122)
- [CNBC: SK Hynix shares plunge 10% amid Asia tech rout (October 14, 2026 ET)](https://www.cnbc.com/2026/10/15/sk-hynix-samsung-softbank-stocks-asia-tech-rout-ai-funding-worries.html)
- [Korea JoongAng Daily: Kospi plunges over 7% as AI doubts, U.S. rate fears hit Seoul (October 15, 2026)](https://www.koreajoongangdaily.com/business/kospinbspplunges-over-7-as-ai-doubts-us-rate-fears-hit-seoul/12922059)
- [BBC News: Anthropic flags revenue surge to investors ahead of stock market debut (October 14, 2026)](https://www.bbc.com/news/articles/cqzjx448vxkgo)
- [Gartner: Over $3.5 Trillion of AI Infrastructure Spending Could Be Exposed to Impairment by the End of 2030 (October 14, 2026)](https://www.gartner.com/en/newsroom/press-releases/2026-10-14-gartner-says-over-us-dollars-three-and-a-half-trillion-of-artificial-intelligence-infrastructure-spending-could-be-exposed-to-impairment-by-the-end-of-2030)
- [Times of AI: Anthropic Q3 revenue, attendees say (October 15, 2026)](https://timesof.ai/2026/10/anthropic-q3-revenue-16-8b-adjusted-profit-investor-day)
- [Times of AI: Broadcom's Hock Tan on capital (October 13, 2026)](https://timesof.ai/2026/10/hock-tan-capital-biggest-constraint-ai-investors-casino)
- [Times of AI: KOSPI chip selloff and rebound (October 12–14, 2026)](https://timesof.ai/2026/10/kospi-chip-selloff-samsung-sk-hynix-ai-bubble-oct12)