Asian markets plunge as AI sell-off hits KOSPI, Nikkei before Big Tech results

Asian stock markets tumbled on Tuesday, with Japan's Nikkei and South Korea's KOSPI leading the decline as a deepening rout in artificial intelligence and semiconductor stocks rattled investor confidence. The sell-off came as jitters over the AI sector, which has powered much of this year's market gains, spread from Wall Street to Asia.

Nikkei and KOSPI hammered by chip stock slump

Tokyo's Nikkei 225 index fell sharply, dragged down by heavy losses in chip-making equipment makers and AI-linked firms. The benchmark lost ground as investors rushed to lock in profits ahead of a busy week for corporate earnings in the United States.

Seoul's KOSPI also took a beating, with major tech and semiconductor stocks bearing the brunt of the selling. South Korean markets have become increasingly sensitive to swings in global tech sentiment, given the country's dominant position in memory chips and electronics supply chains.

The sell-off in Asia mirrored a brutal session on Wall Street overnight, where the Nasdaq Composite slid as investors dumped shares of AI darlings. The rout underscored growing nervousness that sky-high valuations in the AI space may not be justified by near-term earnings.

AI euphoria gives way to profit-taking

The current downturn marks a sharp reversal from the months-long rally fuelled by optimism around generative AI. Analysts pointed to a lack of fresh catalysts and mounting concerns over regulatory headwinds as reasons for the pullback.

US and Korean tech stocks are now tightly linked, according to a CNBC report, and that interdependence is amplifying losses when sentiment turns sour. The Financial Times described the sell-off as a deepening rout, with investors fleeing chipmakers across both regions.

Oil prices also extended their decline, adding to the risk-off mood in global markets. Bloomberg reported that Asian stocks were set for further losses as the commodities rout compounded worries about slowing demand.

Big Tech earnings in focus

All eyes are now on the upcoming earnings reports from America's largest technology companies, scheduled for later this week. The results are expected to provide a crucial test for the AI narrative that has propped up markets.

If Big Tech earnings disappoint or offer cautious guidance, the sell-off could deepen. Conversely, strong numbers might stem the bleeding and restore some confidence in the sector.

Traders are also watching for any signals from central banks, as interest rate uncertainty continues to weigh on broader market sentiment. The combination of high valuations and macroeconomic headwinds has made investors particularly skittish.

Asian markets are likely to remain volatile in the near term, with the direction hinging on how US tech giants perform. The coming days will determine whether this is a healthy correction or the start of a more prolonged downturn for AI stocks.