Shares of the two South Korean chipmakers, SK Hynix and Samsung Electronics, reached record highs on Friday after nearly a week-long holiday, supported by a series of artificial intelligence deals.

SK Hynix shares jumped 10%, while Samsung Electronics shares rose about 6%, hitting new record levels, according to FactSet data.

Both companies are expected to benefit from the OpenAI and AMD deal, which could allow Sam Altman to acquire a 10% stake in AMD. AMD shares have surged more than 40% so far this week following the news.

Nvidia shares also rose 2.6% this week after CEO Jensen Huang told CNBC that demand has increased in recent months. Huang also confirmed the company’s participation in funding Elon Musk’s AI startup, xAI, saying he is “very excited about the funding opportunity they offer.”

Asia-Pacific markets showed mixed trading on Friday, following Wall Street declines, as investors assessed the economic outlook.

Japan’s Nikkei 225 fell 0.33%, while the Topix index dropped 0.92%.

South Korea’s Kospi index rose 0.66% after returning from holiday, while the Kosdaq small-cap index fell 0.37%.

Australia’s stock index declined 0.26%.

Hong Kong’s Hang Seng index dropped 1%, while China’s CSI 300 index fell 1.01%.