Investors warn AI bubble poses major economic risk as inflation fears and unsustainable spending mount

AI-Driven Inflation Emerges as Overlooked Threat

Global stock markets riding high on AI euphoria may be ignoring one of 2026's most significant threats: AI-driven inflation that could derail the tech investment boom 1

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. Money managers are bracing for inflation to re-accelerate as the multi-trillion-dollar race by hyperscalers like Microsoft, Meta, and Alphabet to build new data centers devours energy and advanced chips at an unprecedented rate. Trevor Greetham, head of multi-asset at Royal London Asset Management, warns that tighter money could be "the pin that pricks the bubble," potentially reducing investors' appetite for speculative tech stocks and raising funding costs for AI projects 1

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Morgan Stanley strategist Andrew Sheets notes that "costs are going up not down in our forecast, because there's inflation in chip costs and inflation in power costs" 1

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. He predicts U.S. consumer price inflation will stay above the Federal Reserve's 2% target until the end of 2027, driven partly by heavy corporate investment in AI. Julius Bendikas, European head of economics at Mercer, which manages $683 billion in assets directly and advises on $16.2 trillion, admits "what keeps us awake at night is that inflation risk has resurfaced" 1

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Massive Investments in AI Face Profitability Questions

The economic risk intensifies as AI investment reached $400 billion in 2025, with even higher capital expenditure forecast for 2026 3

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. Deutsche Bank expects AI data center capital expenditure to reach as much as $4 trillion by 2030, warning that rapid rollout could cause supply bottlenecks in chips and electricity that make investment costs spiral 1

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. Yet profitability and sustainability remain elusive. AI skeptics argue that revenues are rising rapidly but not nearly enough to cover the unsustainable investment levels under way 3

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Ed Zitron contends that the "unit economics" of the entire industry—the cost of servicing individual customer requests against pricing—simply don't add up 3

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. The vast data centers required to train and run models are so expensive that many are financed by debt secured against future revenue. Bloomberg analysis revealed $178.5 billion in data center credit deals in 2025 alone, raising concerns about leverage and financial engineering reminiscent of past corporate crashes 3

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Investors Prepare for Potential AI Bubble Burst

Terrified investors are already positioning portfolios for a potential AI bubble burst, with some pulling back on major tech stocks while others bet on share price drops 4

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. Blue Whale Growth sold its Microsoft and Meta holdings, with chief investment officer Stephen Yiu citing concerns about "return on investment in some cases, while some of the valuations are insane—especially in private markets" 4

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. GQG Partners chair Rajiv Jain noted that "AI's massive cash burn remains elevated with very little profitability in sight," prompting his fund to exit all Magnificent Seven holdings 4

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Vincent Mortier, chief investment officer at fund management firm Amundi, told the Financial Times that "whether there are excesses in the equity market on AI is no longer questionable, but to figure out which exact companies will be the losers and when this reckoning will happen is difficult" 4

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. Markets have shown early warning signs, with Oracle's shares plunging after revealing soaring spending, while Broadcom's stock dropped after warning that high profit margins would get squeezed 1

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Major Tech IPOs Could Amplify Market Volatility

The stakes rise further as 2026 shapes up to be the year of major tech IPOs, with SpaceX, OpenAI, and Anthropic all reportedly eyeing market debuts 2

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. SpaceX is allegedly targeting a June debut expecting to raise more than $30 billion, while OpenAI plans an IPO of up to $1 trillion valuation as early as late 2026 2

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. These tech IPOs would give the market its first major pure-play AI stocks, potentially forcing a reckoning on inflated valuations and actual profitability prospects.

University of Florida IPO expert Jay Ritter notes these could be among the biggest IPOs ever, with "only a small number worldwide that have raised more than $20 billion" 2

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. The timing is critical, as the Magnificent Seven tech stocks now account for 35% of the S&P 500, up from 20% three years ago 3

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. A share price correction would have significant real-world consequences for risk for global stock markets.

Central Banks May Halt Rate Cuts Amid Price Pressures

Aviva Investors identifies a key market risk from central banks ending rate-cutting cycles or even hiking rates as price pressures build from AI investment and government stimulus spending 1

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. This shift in monetary policies would slam the brakes on easy money flowing into AI-obsessed markets. Kevin Thozet, portfolio manager at asset manager Carmignac, warns that "inflation is what could start to scare investors and cause markets to show some cracks," prompting him to stock up on inflation-protected Treasuries 1

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George Chen, partner at consultancy Asia Group and former Meta senior executive, predicts that "memory chip cost inflation will push up prices for AI groups, lower investors' returns and then the flow of money into this sector will reduce" 1

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. As rate hike risks increase, the price-earnings valuations investors apply to large AI stocks would fall, potentially triggering the correction that cautious investors are already preparing for. Bridgewater hedge fund founder Ray Dalio warned that the tech market is "now in the early stages of a bubble," though some analysts argue a crash may still be distant thanks to sustained enthusiasm 4

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