The IMF's Global Financial Stability Report described the three factors as "plausible near-term catalysts for a sharp tightening of financial conditions and market turmoil".
The fund highlighted the interconnected nature of big AI companies and the high levels of borrowing being undertaken to fund investment in the sector. "Weaker or less durable investment and profitability in AI could trigger a correction in AI-related asset prices, exacerbated by rising leverage, concentrated exposures, and circular financing arrangements," it said. Such a reassessment would "sharply reduce investment, trigger equity market corrections, and tighten financial conditions, with global spillovers".
The "magnificent seven" big tech stocks (Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia and Tesla) now account for more than 35% of the S&P 500 index, up from 12% a decade ago, and their combined market value has grown by more than 50% in the past two years.
Yet the IMF pointed to "growing evidence" that the successful rollout of AI "may not require investment on the massive scale being undertaken by 'hyperscaler' firms", and that "potential economic gains may not be as large as expected". The hyperscalers, the companies building the underlying AI infrastructure including vast datacentres, include Amazon Web Services, Google, Meta and Oracle.
The report also highlighted rising leverage that could amplify a downturn, including corporate debt, hedge fund investment and retail investors borrowing to speculate in AI stocks. These sources of leverage "heighten the potential for forced selling and surges in equity volatility", it said.
It further warned of "circular financing" deals tying stronger AI companies to weaker partners, identifying $300bn worth of transactions between hyperscalers and weaker AI firms in the past three years.
"The consequences of an AI correction could be global," the report said. Outside the US, Asian markets would be most exposed, while the UK and euro area could be more insulated, though their investors with exposure to the US would be hit.
