SK Hynix stock surges 15% as Samsung's blowout profit lifts chip sector

South Korea’s SK Hynix climbed on Wednesday after Samsung Electronics flagged a stronger-than-expected first-quarter profit.

The figure reinforced investor optimism that artificial intelligence spending will continue to support demand for memory chips even as supply remains tight.

Shares of SK Hynix, South Korea’s No. 2 memory chipmaker, rose as much as 15% to 1,050,000 won, according to Reuters, helping lift technology and semiconductor stocks.

The move reflected growing confidence that tight supply and rising demand for AI-related memory products are pushing up chip prices and strengthening earnings across the sector.

Market reaction

The rally in SK Hynix came as broader South Korean equities also advanced, with gains in semiconductor names leading the market higher.

Samsung’s upbeat outlook added to expectations that the memory cycle is strengthening, even as supply constraints persist.

For the market, that is a supportive signal for memory makers. If supply remains tight while AI investment accelerates, chip prices could stay firm for longer than previously expected.

That would be especially positive for companies such as SK Hynix, which are highly exposed to rising demand for advanced memory used in AI servers and data centres.

What Samsung signalled

Samsung said earlier this week that first-quarter operating profit was likely to reach about 57.2 trillion won (roughly $38 billion), well above analyst expectations and up sharply from a year earlier.

The guidance marked a strong rebound in earnings, driven by higher memory-chip prices and robust demand tied to AI infrastructure.

The outlook gave investors a fresh reason to turn more constructive on the semiconductor cycle.

Industry data cited by Reuters also points to a sharp rise in memory prices, reinforcing expectations that the sector’s recovery still has room to run.

Why it matters for SK Hynix

Samsung’s outlook is closely watched as a read-through for SK Hynix, one of the world’s largest memory chipmakers and a key beneficiary of the AI boom.

Reuters reported that expectations for a strong showing from SK Hynix were being reinforced by signs of rising memory prices and stronger demand from artificial intelligence applications.

The company has already been benefiting from the improving pricing environment, and investors are increasingly betting that it will continue to outperform if current trends hold.

Its strong exposure to high-bandwidth memory — a critical component in AI systems — has positioned it at the centre of the current upcycle.

Investors will now focus on SK Hynix’s upcoming results and, in particular, management commentary on pricing, supply conditions and the durability of AI-led demand.

The key question is whether demand for higher-capacity memory chips can continue rising fast enough to offset broader macro risks and sustain the pricing cycle.

For now, the market appears to be betting that the answer is yes.

Samsung’s upbeat profit signal has strengthened confidence in the sector, while tight supply conditions suggest memory makers may continue to benefit from favourable pricing dynamics.

If that combination holds, SK Hynix could remain one of the strongest winners from the next phase of the AI infrastructure build-out.