Hacker News front pageJul 29, 2026, 09:56 UTC+8

Chip stocks slide in US and Asia as AI jitters rattle investors

Nvidia fell 5% on Monday, losing the top market-cap spot to Apple. The trigger was a WSJ report that Nvidia is in talks to put roughly $250bn into an OpenAI data-centre project, renewing fears about whether massive AI capex will ever pay off. South Korea's Kospi was halted by a circuit breaker and closed down 10.8%; Samsung and SK Hynix each dropped over 13%. Japan's Nikkei 225 fell nearly 4%. Analysts noted that heavy retail leverage in Korea amplified the move. European markets, with less AI exposure, opened slightly higher.

Why it matters: Global chip sell-off, Nvidia loses top market cap spot, Korea triggers circuit breaker — all driven by collective doubt about AI ROI. Hits all three HKR axes, but it's a market reaction report rather than original scoop, so lands at 78, the featured threshold.

Read the original ↗Export Markdown

Take

The number that matters here is $250 billion. Nvidia dropped 5% Monday after the WSJ reported it's in talks to put roughly that much into an OpenAI data-center project. That single figure reignited the question that's been nagging markets for months: will all this AI capex ever generate a real return?

The sell-off hit Korea hardest — the Kospi tripped a circuit breaker and closed down 10.8%, with Samsung and SK Hynix each falling over 13%. One reason it was so violent: a lot of Korean retail investors are trading on leverage, which amplifies every correction. SK Hynix had just listed on Nasdaq on July 9 at $149; it's now well below that.

I'd read this as a concentrated panic about AI spending ROI, not a sudden fundamentals collapse. One fund manager in the piece put it bluntly: investors are worried whether the billions going into data centers will earn a proper return. There's also a China angle — CXMT, China's biggest memory chip maker, surged nearly 470% on its Shanghai debut the same day, which adds a competitive pressure narrative.

European markets opened slightly higher because they have less AI exposure. That's a clean tell: this sell-off is specifically about the AI infrastructure bill, not a broad market freakout.

Source: Hacker News front page · bbc.com
Published: Jul 29, 2026, 09:56 UTC+8 · Jul 29, 2026