SK Hynix, Samsung Shares Rally as Temasek Report Boosts Optimism

Shares of Samsung Electronics and SK Hynix soared more than 8% on Wednesday, powering a roughly 5% surge in the benchmark Kospi index, after a domestic media report suggested renewed foreign interest in South Korea's semiconductor giants.

The rally was triggered by a report from South Korean outlet Asia Business Daily, which said Singapore's sovereign wealth fund Temasek Holdings is preparing to invest directly in the two chipmakers through its internal investment team. The report has not been independently confirmed by Temasek, but it was enough to send investors piling back into names that had been under pressure just weeks earlier.

The sharp gains mark a dramatic turnaround from July, when both stocks slid amid growing skepticism over the pace and sustainability of artificial intelligence infrastructure spending by global technology firms. Concerns that hyperscalers might slow purchases of high-bandwidth memory chips and advanced logic components had weighed heavily on sentiment toward Korea's export-driven chip sector.

Wednesday's bounce suggests investors are reinterpreting the AI capital expenditure narrative, betting that demand for memory chips used in data centers and AI accelerators remains structurally intact even if the pace of spending fluctuates quarter to quarter. A high-profile sovereign wealth fund such as Temasek taking a direct stake would be seen as a strong vote of confidence in the long-term outlook for Samsung and SK Hynix, both of which are central suppliers to the global AI supply chain.

The broader Kospi's roughly 5% jump underscores how heavily the index is weighted toward the two chipmakers, whose combined market capitalization makes them the dominant force in South Korean equities. A rally of this scale in a single session is unusual and reflects both the concentration of the index and the intensity of investor appetite for confirmation that the AI investment cycle still has room to run.

Analysts cautioned that the market's reaction, while dramatic, is based on an unverified media report rather than an official announcement from Temasek or the companies involved. Still, the episode highlights how sensitive Korean chip stocks have become to any signal, confirmed or not, about institutional and sovereign investor positioning in the sector.

The episode also illustrates the volatility that has characterized the sector this year, with sentiment swinging sharply between fears of an AI spending slowdown and renewed conviction that memory chip demand will keep climbing as artificial intelligence adoption expands across industries.