Tokyo and Seoul stocks tumble as investors question AI profitability

Thursday 16 July 2026 - 09:16

By: Sahili Aya

Tokyo and Seoul stocks tumble as investors question AI profitability

Asian equity markets came under heavy selling pressure on Thursday as growing investor concerns over the profitability of artificial intelligence investments triggered a sharp decline in technology shares, sending benchmark indices in Tokyo and Seoul significantly lower.

The sell-off was led by semiconductor companies, underscoring the market's increasing scrutiny of whether massive spending on AI infrastructure will translate into sustainable financial returns.

Technology stocks drive market downturn

In early trading, Japan's benchmark Nikkei index fell by more than 3%, while South Korea's Kospi index dropped over 6%, reflecting broad-based weakness across the region's technology sector.

Semiconductor manufacturers were among the hardest-hit stocks, with investors reducing exposure to companies that have benefited from the global surge in AI-related demand over the past several years.

The decline illustrates a shift in market sentiment as investors increasingly focus on earnings potential rather than long-term growth expectations.

AI investment faces growing scrutiny

The rapid expansion of artificial intelligence has fueled record levels of investment in advanced chips, data centers and cloud infrastructure. However, questions are now emerging over how quickly these investments can generate meaningful returns.

Market participants appear increasingly concerned that the pace of capital expenditure by technology companies may outstrip near-term revenue growth, prompting a reassessment of valuations across the AI supply chain.

The renewed caution has particularly affected companies involved in semiconductor production, which have been among the strongest performers during the AI boom.

Regional markets react to changing sentiment

The sharp declines in Tokyo and Seoul highlight the importance of technology companies within both markets.

Japan and South Korea are home to globally significant semiconductor manufacturers and electronics suppliers, making their stock exchanges especially sensitive to shifts in expectations surrounding artificial intelligence and advanced computing.

Analysts suggest that heightened volatility could continue as investors reassess corporate earnings forecasts and the long-term profitability of AI-related investments.

Focus turns to technology earnings

Attention is now expected to shift toward upcoming corporate earnings reports from major technology companies, which may provide greater clarity on the commercial returns generated by AI investments.

The latest market reaction demonstrates that while artificial intelligence remains one of the world's fastest-growing industries, investors are increasingly demanding evidence that substantial capital spending will deliver sustained profitability.