Global markets took another hit this week as AI-related sell-offs spread beyond US borders, dragging Asian and European tech stocks lower. South Korea's KOSPI plunged 6.73 percent to 5,604.6, forcing a brief trading halt after chip giants Samsung Electronics and SK Hynix tumbled 7.87 percent and 9.87 percent respectively. China's CSI300 Index fell 1.4 percent and the Shanghai Composite dropped 0.9 percent, with the 5G Communication Index down 3.8 percent as AI supply chain shares bore the brunt of the losses.
The sell-off coincides with rising US inflation concerns. September data showed the US CPI climbing to 3.7 percent, fueling fears of higher interest rates. Producer prices in China also rose at their fastest pace in over four years. Adding to the anxiety, AI companies funded by heavy debt are rattling bond markets — CoreWeave bond insurance costs have jumped above 11 percent, signalling growing investor unease about the financial sustainability of the AI buildout.
Tech giants including Google, Meta, and Amazon have borrowed $500 billion since January to fund AI infrastructure, pushing AI-related bonds to 25 percent of total private bond issuance, up from just 4 percent two years ago. In Europe, hyperscalers now account for 7 percent of long-term euro bond issuances. The borrowing surge is driving up interest rates and making it harder for governments and other firms to access funding. France is particularly exposed, with its 10-year rates nearing 5 percent as national debt approaches 120 percent of GDP.
The AI demand surge is also reshaping the smartphone market. Global smartphone sales fell 22 percent in the third quarter, the sharpest drop since 2013, as memory chip prices soared up to 350 percent this year. Samsung, SK Hynix, and Micron have redirected capacity toward data centre components, leaving smartphone makers scrambling. Apple raised iPhone prices by £100, while China's shipments fell 15.4 percent year-on-year. Huawei was the only major vendor in China to post growth. IDC warns the downturn could persist into 2027.
On the product front, SAP is gearing up its AI push by making Joule Work generally available by the end of October, targeting automated data entry and other business tasks. The company is also acquiring TechWolf to bolster its AI-powered data management capabilities. NetSuite launched QuickStart, a free AI-first financial platform for startups that handles accounting, invoicing, and forecasting. Meanwhile, Bluesky expanded its Attie app so anyone can build websites, games, and social experiences using custom or open-weight AI models, all connected to the AT Protocol.
Other developments round out the week. Kwala Intel Pro debuted an AI tool delivering stock entry, exit, and resistance levels in 15 seconds, aiming to speed up D-Street research. A Suffolk and MIT study found AI could cut construction costs by 17 to 20 percent and shorten build times by 22 to 25 percent, though Irish developers noted planning uncertainty remains a bigger hurdle. SAP also advanced its AI product lineup ahead of Q3 earnings. DSABench, a new benchmark, tested AI agents across multiple databases and found that even the best models managed only 60.55 percent on single-database tasks and just 16.99 percent when multi-database execution was required, highlighting significant gaps in reliability.
Key Takeaways
- South Korea's KOSPI dropped 6.73 percent to 5,604.6, triggering a trading halt as Samsung and SK Hynix fell 7.87 percent and 9.87 percent.
- US inflation hit 3.7 percent in September, intensifying fears of rising interest rates and pressuring AI-linked bonds — CoreWeave insurance costs exceeded 11 percent.
- Google, Meta, and Amazon have borrowed $500 billion for AI infrastructure, pushing AI bonds to 25 percent of private issuance from 4 percent two years ago.
- Global smartphone sales fell 22 percent in Q3, the worst since 2013, as memory chip prices rose up to 350 percent due to AI data centre demand.
- Apple raised iPhone prices by £100 and China shipments dropped 15.4 percent, with Huawei the only major vendor to grow in that market.
- SAP will make Joule Work generally available by end of October and is acquiring TechWolf to expand its AI capabilities.
- NetSuite launched QuickStart, a free AI-first financial platform for startups covering accounting, invoicing, and forecasting.
- Bluesky expanded its Attie app, enabling anyone to build websites, games, and social experiences using custom or open-weight AI models on the AT Protocol.
- A Suffolk and MIT study found AI could reduce construction costs by 17 to 20 percent and shorten build times by 22 to 25 percent.
- DSABench revealed AI agents struggle with multi-database tasks, with best scores dropping to 16.99 percent when execution across multiple databases is required.
AI stock sell-off spreads globally as inflation and debt fears grow
AI-related stocks fell sharply across Asia and Europe after a Wall Street slump. Memory chip makers like Micron, SK Hynix and Samsung saw heavy losses. US inflation rose to 3.7 percent, raising fears of higher interest rates. Investors also worry that AI companies funded by heavy debt may struggle, with CoreWeave bond insurance costs jumping above 11 percent.
China stocks fall as AI hardware slump and inflation data weigh
Chinese stocks closed at their lowest level in over a year. The CSI300 Index fell 1.4 percent and the Shanghai Composite fell 0.9 percent. AI supply chain shares dropped further, with the 5G Communication Index down 3.8 percent. Producer prices rose fastest in over four years, while consumer inflation came in weaker than expected. HSBC also cut its end-2026 index targets.
Seoul stocks fall sharply on AI and US inflation worries
South Korea's KOSPI index dropped 6.73 percent to 5,604.6, triggering a brief trading suspension. Chip giants Samsung Electronics and SK hynix fell 7.87 percent and 9.87 percent. The sell-off followed weak US stock results and September inflation data showing the US CPI rose 0.6 percent. Most major Korean companies lost value, with bio firm Celltrion among few gainers.
AI boom drives memory chip costs and smartphone sales slump
Global smartphone sales fell 22 percent in the third quarter, the worst drop since 2013. The decline is driven by soaring memory chip prices, which rose up to 350 percent this year as AI data centres demand more components. China's smartphone shipments fell 15.4 percent year-on-year. Huawei was the only major vendor in China to grow, while Apple, Xiaomi and others declined. Analysts expect the sales slump to continue into next year.
Global smartphone sales plunge as memory chip prices hit record highs
Global smartphone shipments fell 22 percent to 255 million units in the three months to September 2026, the weakest quarter since 2013. Samsung fell 5.8 percent and Apple fell 4 percent, while lower-cost phone makers suffered even more. Memory chip prices rose more than fourfold in 2026 as suppliers like Samsung, SK Hynix and Micron focus on AI data centre demand. Apple raised iPhone prices by £100, and consumers are keeping phones longer. IDC warns that the downturn may continue into 2027.
NetSuite launches free AI platform for startups
NetSuite introduced NetSuite QuickStart, a free AI-first financial platform for startups. It automates accounting, invoicing, and financial reporting. The platform also uses AI to help cut costs and improve forecasting. It is available now at no cost.
AI could lower Irish construction costs by 20 percent
A Suffolk and MIT analysis of a San Francisco project found AI could cut construction costs by 17 to 20 percent. It could also shorten build time by 22 to 25 percent. The study noted that 75 percent of construction projects run over budget. Irish developers said high costs and planning uncertainty are bigger problems than access to finance.
SAP advances AI products ahead of Q3 earnings
SAP plans to make Joule Work generally available by the end of October. Joule Work uses AI to help companies automate tasks like data entry. SAP also plans to acquire TechWolf, a company focused on AI-powered data management. Both moves are part of SAP's strategy to expand its AI capabilities.
AI speeds up stock market research with real-time insights
Kwala Intel Pro uses AI to give traders stock entry, exit, support, and resistance levels in 15 seconds. The tool helps traders make faster decisions by analyzing large amounts of data. It can find patterns and trends that human traders might miss. AI is becoming a key tool in D-Street research.
Bluesky expands AI-powered Attie app for building projects
Bluesky expanded its AI-powered Attie app so anyone can build websites, games, and social experiences. Creators can use their own AI model or open-weight options. Projects built with Attie connect to the AT Protocol that powers Bluesky's decentralized social web. Attie aims to help communities build together rather than just solo users.
AI spending surge forces governments to rethink tax systems
Tech giants like Google, Meta, and Amazon have borrowed $500 billion since January to fund AI infrastructure. AI now makes up 25% of total private bond issuance, up from 4% two years ago. This massive borrowing pushes up interest rates and makes it harder for governments and other companies to get funding. In Europe, hyperscalers account for 7% of long-term euro bond issuances. France is especially concerned as its 10-year rates approach 5% amid debt nearing 120% of GDP.
DSABench tests AI agents across multiple databases
DSABench is a new benchmark that evaluates how well AI agents discover sources, coordinate data, and execute tasks across multiple databases. It includes 815 human-reviewed tasks drawn from Spider, BIRD, and LiveSQLBench, with 618 tasks requiring multiple databases. The highest RA-Set score reached 60.55%, while coordination tasks dropped the best score to 34.66%. Adding execution made results even lower, with best clarified configurations reaching only 16.99%. The findings show that finding databases or writing local SQL is not enough for reliable multi-database performance.
Sources
- Inflation, Debt, China: Why AI Stocks Are Taking Such a Beating
- China stocks close lower as AI hardware rout deepens
- Seoul stocks extend losses as AI, US inflation concerns persist
- AI boom triggers slump in smartphone sales as component costs soar
- Global smartphone sales plunge 22% as AI boom drives memory chip prices to record highs
- NetSuite Introduces Free AI-First Financial Platform That Helps Startups Go From Idea to IPO
- AI Could Cut Irish Construction Costs by 20% [2026]
- SAP Pushes AI Products Toward General Release as Q3 Report Looms
- Trading at the speed of AI: How real-time AI insights are speeding up D-Street research
- Bluesky expands its AI-powered Attie app to let anyone build websites, games, and more
- 'In the medium term, AI will force states to fundamentally rethink their tax systems'
- DSABench: Benchmarking Source Discovery, Coordination, and Execution for Multi-Database Agents
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