# Nvidia Falls 5% and Cedes Most-Valuable Crown to Apple as AI Financing Fears Hit Global Chip Stocks

South Korea's Kospi index fell more than 10% on Tuesday, with Samsung Electronics and SK Hynix each down about 12%, after reports that Nvidia would guarantee roughly $250 billion of OpenAI data-center debt.

- Published: 2026-07-28T05:14:25.866Z
- Canonical: https://polylog.news/2026-07-28/nvidia-falls-5-and-cedes-most-valuable-crown-to-apple-as-ai
- Publisher: Polylog (Global desk)
- Section: markets
- Sources: [Globes (Hebrew)](https://www.globes.co.il/news/article.aspx?did=1001550607#utm_source=RSS), [CoinDesk](https://www.coindesk.com/markets/2026/07/28/bitcoin-slides-2-after-u-s-close-while-korea-s-kospi-plunges-10)

The two-year rise in artificial-intelligence stocks reversed sharply this week. Nvidia fell about 5% on Monday, July 27, and Apple replaced it as the world's most valuable company, [as Israeli financial outlet Globes reported](https://www.globes.co.il/news/article.aspx?did=1001550607#utm_source=RSS) that the decline across the semiconductor sector unsettled markets worldwide. Apple's market value approached $5 trillion after a gain of roughly 1%, while Nvidia settled near $4.77 trillion, according to [CNBC](https://www.cnbc.com/2026/07/27/apple-most-valuable-company-nvidia.html).

The trigger was a report, first carried by the Wall Street Journal, that Nvidia is in talks to guarantee about [$250 billion in debt](https://www.cnbc.com/2026/07/27/nvidia-and-openai-in-talks-for-up-to-250-billion-dollar-ai-backstop.html) for an OpenAI data-center campus in Ohio, in addition to a separate arrangement to help finance OpenAI's purchase of Nvidia chips. Investors and commentators described the structure as circular financing, in which a supplier lends its customer the money to buy the supplier's own products. Several compared the pattern to the arrangements that preceded the dot-com collapse.

The selling continued in Asia. South Korea's Kospi index dropped more than 10% on Tuesday, its steepest fall in months, forcing the Korea Exchange to trigger circuit-breaker mechanisms, [Reuters reported](https://finance.yahoo.com/markets/world-indices/articles/south-korea-kospi-index-sinks-040623347.html). Samsung Electronics fell about 12% and SK Hynix about 12.7%, the two chipmakers most exposed to AI memory demand. Bitcoin fell roughly 2% after the United States close, [according to CoinDesk](https://www.coindesk.com/markets/2026/07/28/bitcoin-slides-2-after-u-s-close-while-korea-s-kospi-plunges-10), while gold held near $4,090 an ounce.

The episode shows how concentrated the global equity advance had become. Nvidia's shares had risen only about 4% in 2026 before Monday, against a 24% gain for Apple, whose management has chosen to rent AI computing capacity rather than build it.

## What this means

The AI capital-expenditure boom has been financed increasingly through vendor credit rather than end-customer cash flow, which means the valuations of the chipmakers, the memory suppliers, and the equity indices weighted toward them now rest on the assumption that data-center demand converts into revenue on schedule. If that assumption slips, the exposure is broad: Korean and Taiwanese exporters, United States megacap indices, and leveraged AI-infrastructure lenders all lose together, because the same small group of companies drives them all. From an Austrian view, cheap capital and supplier-financed demand are the classic conditions for malinvestment, and the correction tends to arrive when the credit chain, not the underlying technology, is questioned.

## What to watch

- Whether Nvidia and OpenAI confirm or reduce the reported $250 billion guarantee, because the terms will show how much of AI demand is genuine third-party purchasing rather than vendor-supported.
- Credit spreads on AI-linked corporate and data-center debt, which would signal whether lenders are starting to price the circular-financing risk that equity markets began pricing this week.
- Whether the Kospi and other chip-heavy Asian indexes stabilize or extend losses after circuit breakers, a sign of whether this is a repricing or a broader unwind.