Concerns Mount Over Potential Stock Market Crash Amid Geopolitical Turmoil

In the past week, US government borrowing costs hit their highest level since 2007, impacting households, businesses, and governments globally. Concerns are growing that inflation could rise due to ongoing geopolitical tensions and President Donald Trump's fiscal policies, which are pushing US debt beyond $40 trillion (£29.9 trillion).

Oil prices have surged above $100 per barrel, triggering heavy selling in the bond market and raising questions about the stability of stock prices. The S&P 500 index currently stands 3% below its peak, and the combined value of seven major tech firms—Nvidia, Apple, Google, Microsoft, Meta, Amazon, and Tesla—exceeds $20 trillion. Analysts are cautioning that market valuations may be unsustainable as uncertainties grow.

Albert Edwards, a senior analyst at Société Générale, expressed concern over the potential ripple effects of the soaring oil prices on the global economy, suggesting that sharply rising interest rates could trigger a recession. This week, the US Federal Reserve raised interest rates for the first time since 2023, amidst rising energy costs that are straining both households and businesses.

Central banks worldwide are also responding; the Bank of England anticipates raising rates four times by the end of 2024, while the European Central Bank and Bank of Japan have also increased rates.

Market metrics indicate a potentially overvalued stock market. The S&P 500's CAPE ratio—a cyclically adjusted price-to-earnings ratio—has soared to nearly 41, more than double its long-term average. Research suggests that AI-related sales would need to increase by $600 to $800 billion in two years to justify current investments in the sector, a feat many consider unlikely.

Investor apprehension is growing, with over 1,000 participants registering for a Jefferies analyst call discussing potential AI market risks. Historical parallels are being drawn to the dotcom crash of 2000 and the 1929 market crash, where over-leveraged investors faced severe losses.

Concerns are particularly pronounced in South Korea, where retail investors are buying AI-related stocks with borrowed money, risking significant losses amidst market volatility. Oracle’s stock has halved recently due to worries about excessive borrowing for AI-related infrastructure.

Credit market stress is evident, and the Bank of England has noted increasing caution among investors towards high-yield debt. In the US, the yield on 10-year Treasury bonds crossed 5%, a threshold that some analysts believe could precipitate market instability.

Despite these risks, some analysts suggest that a significant downturn may require a trigger event and argue that current inflation fears may be overstated. Optimism remains that a slowdown in AI investment could prevent a bubble from forming, and recent productivity gains due to AI could eventually support stock valuations.

Andy Haldane, former chief economist at the Bank of England, noted a fragile situation; he does not foresee an outright market collapse but suggests that a gradual cooling could occur without crashing the global economy.