Global financial markets faced significant turbulence as investors recalibrated their outlook on the artificial intelligence sector following the results of the US midterm elections. While markets have seen minor fluctuations recently, the scale of Thursday’s sell-off has prompted concerns that the long-predicted bursting of a tech bubble may finally be underway.
The impact was immediate and historic: over $3.2tn was wiped from the value of US stocks in a single day—a figure exceeding Canada’s annual economic output. The tech-heavy Nasdaq index tumbled by 5.5%, while the S&P 500 dropped 4.4%. Although markets saw a slight rebound upon reopening in New York, the initial losses underscored deep-seated anxieties regarding the stability of tech valuations. US markets rebounded after trading reopened in New York, but failed to recover all of the lost ground amid lingering concerns of a relapse in selling pressure. More than $3.2tn (£2.4tn) was wiped from the value of the US stock market on Thursday – bigger than the annual output of the Canadian economy – after the tech-heavy Nasdaq fell by 5.5% and the blue-chip S&P 500 fell by 4.4%.
Analysts have warned for months that the rapid inflation of AI company values had become increasingly detached from underlying financial realities. The cyclically adjusted price-to-earnings (Cape) ratio, a key indicator of market overvaluation, has reached its highest level since 2000. Further signaling this disconnect, Alphabet’s valuation plummeted by over $500bn last week following a disappointing earnings report. The cyclically adjusted price-to-earnings (Cape) ratio, had risen to its highest level since 2000, showing that the US stock market was unusually highly valued relative to profits, one measure of whether a market is overvalued.
Much of the current market anxiety is tied to the recent Democrat victory in the US midterms. Investors anticipate that the new administration may pursue stricter regulations on artificial intelligence and tighter controls on the construction of power-intensive data centers. Investors are predicting that a Democrat-controlled Congress could lead to tighter control of AI and datacentre construction – slowing development in one of the engines of global economic growth and corporate earnings on the stock market. According to moratoriums on datacentre construction were effectively on the ballot in several, Amid growing public opposition to the building of vast, resource-hungry facilities.
During the campaign, several Democrats focused on limiting the influence of big tech and challenged the rapid proliferation of resource-heavy infrastructure.
Elon Musk, the CEO of Tesla and SpaceX, faced notable headwinds as shares in his companies fell sharply following the election results. Having invested nearly half a billion dollars in Republican support, Musk’s business interests are now navigating a political landscape where potential moratoriums on data center construction have gained traction among voters concerned about safety and environmental impacts.
The concentration of the market remains a primary risk factor. The “magnificent seven” stocks—Nvidia, Apple, Google, Microsoft, Meta, Amazon, and Tesla—comprise over one-third of the S&P 500, meaning institutional funds are heavily exposed to their specific performance. This interconnectedness creates a scenario where a localized sell-off can quickly escalate into broader economic instability.
External geopolitical factors further complicate the outlook. As central banks raise interest rates to combat inflation exacerbated by the Iran war, the threat of stagflation looms. The AI boom had previously acted as a buffer against economic stagnation, but a sustained decline in this sector could undermine global productivity goals and job creation prospects.
Despite the bearish sentiment, some experts advise against panic. Ben Barringer, head of technology research at Quilter Cheviot, noted that while a pause in data center expansion and regulatory delays are likely, the long-term pragmatic allocation of resources will continue. He cautioned that while a virtuous circle can quickly turn into a vicious one, investors should observe the market’s trajectory before making drastic moves. In a rout driven by AI and technology stocks that extended to Asia and Europe on Friday, shares on Wall Street plunged on Thursday.
Mark Haefele, chief investment officer at UBS Global Wealth Management, remains optimistic that the fundamental cycle of AI investment is still intact. Describing the current rout as “market indigestion,” Haefele stated that the current economic fundamentals do not justify a prolonged downturn, as global demand for semiconductors and new AI tools remains robust despite the recent volatility.
