The euphoria that has driven artificial intelligence stocks to dizzying heights may be on the verge of a violent correction, according to a new report from City of London analysts. In a stark warning to investors, the team at Capital Economics has flagged that the current valuation of AI companies is 'unsustainable' and bears the hallmarks of a classic speculative bubble.
'We are seeing a repeat of the dot-com mania, but on steroids,' said Dr. Eliza Thornton, chief economist at Capital Economics. 'The market is pricing in a future that assumes AI will transform every industry overnight. The reality is more complex and slower.'
The warning comes as the Nasdaq-100, heavily weighted with AI-linked stocks, has surged over 40% in the past twelve months. Companies like Nvidia, which manufactures the graphics processing units (GPUs) essential for training large language models, have seen their market capitalisations swell to levels that dwarf entire economies. Nvidia alone is now worth more than the UK's entire FTSE 100 index.
But the analysts argue that the underlying fundamentals do not justify these valuations. Many AI start-ups remain unprofitable, burning through cash to develop technologies that are still years away from commercial maturity. Even the giants of the sector, such as Google's parent Alphabet and Microsoft, are investing billions into AI with no clear timeline for returns.
'We are in a land grab,' said Julian Vane, Technology & Innovation Lead at The Standard. 'Companies are spending furiously to acquire talent and compute power, but the revenue is speculative. The user experience of society is not yet transformed, and we are seeing the first cracks.'
Vane points to the recent volatility in AI stocks as a sign of fragility. Last week, shares of C3.ai, a company that provides enterprise AI software, fell 15% after a disappointing earnings report. Similarly, SoundHound AI, which develops voice recognition technology, saw its stock price halve in a single day following a short-seller report questioning its revenue recognition.
'These are not isolated events,' Vane added. 'They are canaries in the coal mine. The hype cycle is ahead of the technology curve, and when reality sets in, the correction will be brutal.'
The report from Capital Economics draws parallels to the early 2000s, when the Nasdaq crashed by 78% from its peak. However, the analysts note that the current bubble is distinct in its global reach and the involvement of central bank policies. With interest rates at historic lows in the aftermath of the pandemic, investors have been chasing yield in riskier assets, inflating prices further.
'This is not just a tech story,' said Thornton. 'It's a monetary story. Cheap money has fuelled this bubble, and as rates rise, the air will escape.'
The Bank of England has already begun tightening monetary policy, and the US Federal Reserve is expected to follow suit. Higher interest rates make future earnings less valuable, which is a death knell for high-growth, low-profit companies.
For the average investor, the warning is clear: do not get caught holding the bag. Diversify, focus on fundamentals, and be wary of companies that promise the world but deliver only promises.
'AI is real. It will change the world,' Vane concluded. 'But the stock market is not the same as the technology. We must separate the signal from the noise, and right now, the noise is deafening.'
The full report from Capital Economics will be released next week, but early excerpts suggest a cautious tone. 'The potential for AI is immense, but the current pricing is disconnected from reality,' the report states. 'Investors should brace for turbulence.'
As the sun sets on this bubble, the question remains: when the music stops, who will be left without a chair?
