Bank of England Governor Warns AI Investment Boom Could Trigger Market Shocks

The Governor of the Bank of England has cautioned that the enormous sums of money flowing into artificial intelligence could one day destabilise financial markets, and that the UK must be ready to absorb the fallout. In an exclusive interview with the BBC, Andrew Bailey said the central bank is monitoring the scale of investment in AI "very carefully", warning that the assumptions underpinning today's soaring valuations may not all prove justified.

Bailey's remarks come at a moment of extraordinary exuberance around AI. Investors have poured capital into the sector on the expectation of transformative profits, pushing the valuations of some companies into the trillions of dollars. The Bank's governor acknowledged that this enthusiasm reflects genuine optimism about the technology's economic potential, but he stressed that optimism and reality do not always align. Asked directly whether he believed an AI bubble might burst, he replied that a correction in asset prices was a plausible scenario at some point.

At the centre of the boom is Nvidia, the AI chipmaker that is now the world's most valuable listed company, with a market capitalisation of roughly $5.5tn (£4.14tn). Its rise has been fuelled by investors betting that demand for the hardware powering AI systems will keep climbing. The largest technology firms — Alphabet, Meta, Microsoft and Amazon — are together committing hundreds of billions of dollars to build out the infrastructure and models that underpin the technology. In addition, two of the most prominent AI developers, Anthropic and OpenAI, are preparing to list shares on the US stock market, a move widely expected to draw hundreds of billions of dollars more into the industry.

Bailey described the inflow of capital as natural, given that AI is a major growth area, and noted that rising share prices for the companies developing it reflect high expectations about what the technology can deliver. However, he offered a note of caution drawn from history. "Everybody is currently priced to be a winner," he said, before pointing out that past technological revolutions have produced losers as well as winners. He cited the early days of internet search, when Netscape led the market before being eclipsed by Google. Netscape no longer exists, a reminder that market leadership in a young industry is rarely permanent.

The governor said the Bank is prepared for the possibility that shocks will hit markets, and that its priority is ensuring the financial system remains resilient enough to cope. That emphasis on resilience reflects the central bank's broader mandate to protect stability, particularly when speculative investment concentrates in a single sector. A sharp repricing of AI-related assets could ripple through pension funds, lenders and households, making advance preparation essential.

Beyond market valuations, Bailey highlighted a series of other risks associated with AI. One is the technology's use in cyber attacks. He said AI offers a "much more powerful way of uncovering vulnerabilities", exposing weaknesses in operating software that is used by institutions and ordinary people alike. In the wrong hands, he warned, it amounts to a potentially very powerful weapon, underscoring the challenges facing defenders who must patch flaws faster than attackers can exploit them.

A second concern is the spread of deepfakes — AI-generated images and videos that appear authentic — which can be used to mislead the public. Bailey has experienced this personally. In June, fabricated images depicting him and the politician Nigel Farage in a physical fight circulated on the social media platform X. He told the BBC that the fakes were produced in a way that made it difficult for the Bank to establish their origin, and he called for the ability to trace such material back to its source, saying the tech sector would need to provide substantial help to make that possible.

The governor's warnings carry particular weight because the Bank of England sits at the intersection of finance and public trust. Deepfakes that impersonate central bankers or other officials could be used to manipulate markets, spread false information or undermine confidence in institutions, making the ability to verify authenticity increasingly important. Bailey's own experience illustrates how quickly the line between real and fabricated content can blur.

For all his concerns, Bailey was clear that AI also offers significant opportunities. He said the technology has "great potential to strengthen growth in our economies", something he argued the UK needs. He also identified a practical benefit: AI can speed up the analytical work that supports the Monetary Policy Committee, the body responsible for setting interest rates. Crucially, he framed the technology as a tool rather than a decision-maker — it does not make the call on rates, but it can help policymakers reach their conclusions more efficiently.

That distinction matters as the Bank weighs how to integrate AI into its own operations while guarding against overreliance on automated systems. The governor's position suggests a cautious embrace: using the technology to enhance human judgement rather than replace it. He has previously argued that regulating AI is "not the right place to start", indicating a preference for addressing specific harms and building resilience rather than imposing sweeping new rules at the outset.

Taken together, Bailey's comments sketch a dual picture of AI as both an engine of potential growth and a source of novel vulnerabilities. The Bank's stance is to encourage the benefits while preparing for the possibility that the investment wave cresting through global markets may at some point break. For the UK economy, the challenge will be to capture the productivity gains without being exposed to the kind of sudden correction that has followed previous episodes of technological fervour.