What happened
Nvidia fell 5% on Monday, losing its position as the world's most valuable company to Apple, after the Wall Street Journal reported it is in talks to provide around $250bn for OpenAI as part of a data-centre project. The sell-off spread to Asian markets on Tuesday; South Korea's Kospi index fell 10.8% (paused temporarily after an 8% drop), with Samsung Electronics and SK Hynix each down more than 13%, and Japan's Nikkei 225 closed nearly 4% lower.
Why it matters
Investors are questioning whether the billions tech firms are spending on AI data centres will generate returns, according to analysts cited in the article. South Korea's market amplified the decline because it is heavily concentrated in Samsung and SK Hynix, and many Korean investors use debt to buy stocks, which "exaggerates the movements when we get a correction like this," per Jane Sydenham of Rathbones. Apple's 25% rise this year and overtaking of Nvidia reflects investor appetite for companies "not taking part in the AI race," suggesting caution about unlimited AI infrastructure spending.
What to watch
Jun Bei Liu of Ten Cap told the BBC investors are likely to reinvest in chip and AI stocks after the US holiday season, indicating the sell-off may be temporary profit-taking rather than lasting exit. Meanwhile, China's ChangXin Memory Technologies (CXMT) soared nearly 470% on its Shanghai debut Monday, signalling competition from Chinese chip makers is widening investor concerns about returns on Western AI spending.
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The sell-off began with Nvidia's 5% Monday decline after reports of massive planned spending on OpenAI's data-centre infrastructure, but the real trigger appears deeper: investors are re-evaluating whether the billions tech firms are pouring into AI will actually generate returns. Jane Sydenham of Rathbones noted that "AI spending among tech firms is 'something that's been testing investors' nerves on and off in the last couple of months'." The question "Is it going to earn a proper return in the future?" is now front-and-centre for market participants.
Asia saw the sharpest pain because of market structure and sentiment. South Korea's Kospi is highly concentrated in memory-chip makers Samsung and SK Hynix, which fell sharply on Tuesday. Critically, many Korean investors use borrowed money to buy stocks, meaning corrections "exaggerate the movements," according to Sydenham. The index had more than doubled from the start of the year to mid-June but has since lost around a third of its value—a dramatic reversal that amplified Tuesday's panic selling.
Meanwhile, Apple's ascent to world's most valuable company reflects a tactical rotation toward lower-risk tech names. The iPhone maker has risen about 25% this year partly because it is "not taking part in the AI race" and avoids the massive data-centre capital intensity that rivals face. However, Jun Bei Liu of Ten Cap suggested the sell-off is profit-taking rather than permanent exit; she told the BBC investors are "likely to reinvest in these stocks after the US holiday season." That near-term outlook contrasts with longer-term concern about Chinese competition: ChangXin Memory Technologies (CXMT) soared nearly 470% on its Shanghai IPO debut Monday, signalling that Chinese chip makers are becoming a credible alternative supply source.
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