AI Stocks Tumble as Investors Question Massive AI Infrastructure Spending and Valuations

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Global markets experienced sharp declines as AI stocks and chip stocks faced intense selling pressure. The Philadelphia Semiconductor index shed over 11% since June, while Japan's Nikkei 225 plunged more than 5%. Investors are questioning whether billions in AI infrastructure spending will deliver expected returns, triggering widespread profit-taking across technology sectors.

Global Stocks Tumble as AI Trade Reverses

Global stocks tumbled sharply as investors retreated from AI stocks and semiconductor stocks that have dominated market gains throughout the year

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. Japan's Nikkei 225 index slid more than 5%, while mainland China's CSI 300 and Hong Kong's Hang Seng benchmark declined 3% and 2.3% respectively

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. The tech stock downturn extended to U.S. markets, with futures for the Nasdaq 100 and S&P 500 indices down 1.7% and 0.9% respectively

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. South Korea's KOSPI, a bellwether for AI investments, plunged nearly 5% when markets reopened

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Source: BNN

Source: BNN

The losses were concentrated in technology stocks, with Japanese chipmaker Kioxia falling more than 16%—down more than half from its June peak

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. TSMC, the world's largest contract chipmaker, fell more than 7% despite posting quarterly results that topped analysts' estimates

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. Memory chipmakers and data storage stocks led declines, with Sandisk, Seagate, and Micron all down more than 5%

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AI Infrastructure Spending Fuels Market Anxiety

Investors have begun questioning whether the vast amounts of money being spent on AI infrastructure will deliver expected returns

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. Companies are investing billions in data centers and chip manufacturing facilities to meet surging demand. TSMC announced it would raise its capital expenditure forecast for the year to $60 billion to $64 billion, up from $52 billion to $56 billion, and plans to invest another $100 billion in its Arizona operations

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. Skepticism is growing over the potential for revenue growth that matches the enormous spending by AI giants

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Source: AP

Source: AP

Richard Yetsenga, chief economist at ANZ, noted the declines "show the uncomfortable reliance of so many markets and so much economic activity on the AI boom at the moment"

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. Global cloud and AI infrastructure capital expenditure is expected to approach $1.5 trillion by 2027, representing a 40% to 50% jump year-over-year

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Chip-Stock Slide Continues Despite Strong Earnings

The Philadelphia Semiconductor index has shed more than 11% since hitting a record high in June, though it remains up 83% for the year

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. The chip-stock slide has persisted despite solid earnings reports across the sector. Funds tracking U.S. semiconductor stocks clocked outflows of around $11 billion in the week ended June 24, the biggest weekly outflow this century

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Nvidia shares fell 2.2%, while AMD and Intel also declined

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. Analysts at BNY said in a report that Taiwanese stocks saw a record level of selling by foreign investors, citing a reassessment of valuations and fiercer competition from Chinese companies

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. However, they emphasized: "This is not the AI or semiconductor growth story collapsing"

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Stock Market Volatility Driven by Multiple Factors

Stock market volatility has been amplified by several converging factors beyond concerns about AI infrastructure spending. Markets were shaken by the rollout of another powerful Chinese AI model by Beijing-based Moonshot AI

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. The new Kimi K3 open-source model was viewed as another sign of how lower-cost, capable Chinese AI models are increasingly challenging rivals like Anthropic's Claude and OpenAI's GPT

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. In China, AI start-ups Zhipu and MiniMax declined 25% and 15% respectively after the Moonshot AI debut

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Geopolitical tensions also contributed to market unease. Renewed strikes between the United States and Iran pushed oil prices higher, with Brent crude trading above $90 a barrel

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. Tanker traffic in the Strait of Hormuz, a crucial waterway for global oil transport, nearly ground to a halt, adding pressure on supplies and raising inflation concerns

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. Wee Khoon Chong, a senior strategist at BNY, noted: "Central banks are less dovish than we thought they would be. We have round two of Middle East tensions and oil prices are higher again. It's bringing inflation back into the frame"

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Profit-Taking and Valuation Concerns

Analysts suggested that geopolitical concerns and inflation worries gave investors an opportunity for profit-taking after massive gains

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. Even after recent selling, Asia's chipmakers remain among this year's most successful trades, with Kioxia rising more than 2,000% in the past year and TSMC more than doubling

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. Samsung Electronics and SK Hynix are up more than 200% and 500% respectively over the past year

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Valuations present a mixed picture across the sector. Nvidia trades at a forward price-to-earnings ratio of about 19, its lowest in more than 10 years, while Micron's forward P/E touched a nine-year low of 5.4 in May

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. However, forward P/E ratios for Intel, AMD, and Marvell Technology stand well above their longer-term averages

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Source: Market Screener

Source: Market Screener

Fund Managers Remain Cautiously Positioned

A survey of fund managers by Bank of America found that many "trimmed July tech longs to hedge AI risks," but "no one [is] short," and semiconductors remain the "world's most crowded trade"

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. Data from ORTEX showed that bets against major semiconductor companies have been piling up over the past year, with short interest now at a three-year high

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. Peter Hillerberg, co-founder at ORTEX, characterized this as "caution and hedging creeping back into the sector after a huge run, not the kind of crowded, high-conviction shorting that leads to squeezes"

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Steve Sosnick, chief market analyst at Interactive Brokers, observed: "We've never seen this kind of extreme earnings growth. But the question then becomes, how long can we expect this to continue"

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. Despite current volatility, many Wall Street analysts view the pullback as healthy, suggesting it could present buying opportunities at discounted valuations

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