BIS Warns the AI-Driven Equity Rally Is Showing Signs of Vulnerability

The Bank for International Settlements said on Monday that global market momentum tied to artificial intelligence is showing signs of vulnerability¹. In a new report, the BIS said investors were becoming “increasingly cautious” about the rally³, a finding carried in the same terms elsewhere^2,7.

The institution tied that caution to financing. The BIS warned that the AI-driven equity rally is exhibiting growing vulnerabilities as debt rises, putting the leverage behind the trade rather than its valuation at the centre of the analysis⁴.

It also drew on a specific episode. The BIS said the near-collapse of the AI-focused fund Situational Awareness is a cautionary tale about the increasing role leveraged hedge funds play in global markets⁵, citing the fund’s 67% drawdown and $16 billion fire sale as an illustration of how leveraged non-bank players transmit stress⁶.

Why it matters to investors

The warning comes from the institution that coordinates central banks, which places the AI trade inside the financial stability conversation rather than the equity strategy one^1,5.

The mechanism identified is leverage outside the banking system. The concern is the role leveraged hedge funds now play in global markets⁵, and the Situational Awareness episode is offered as evidence that a single fund’s forced selling can reach the wider market⁶.

Debt is the second channel. The BIS frames the vulnerability as arising amid a surge in borrowing⁴, which means the exposure is not confined to holders of AI equities but extends to whoever financed the position. A drawdown of 67% and a fire sale of $16 billion at a single fund is the scale at which that financing chain becomes visible to everyone else in the market⁶.

What to watch

First, whether the investor caution the BIS describes shows up in positioning rather than commentary^2,3. The report documents a change in attitude; the test is whether it becomes a change in exposure. The institution has stated only that momentum is showing signs of vulnerability, not that the rally has turned¹.

Second, further stress among leveraged non-bank funds. The BIS presented Situational Awareness as a cautionary tale rather than an isolated case, so a second episode would confirm the pattern it is warning about^5,6.

Third, the debt build-out itself, since the BIS has tied the rally’s fragility directly to rising borrowing rather than to prices alone^4,7.