Shares of South Korean chipmakers SK Hynix and Samsung Electronics hit record highs Friday, after a near-weeklong holiday, boosted by a series of artificial intelligence deals.

SK Hynix shares pared gains to rise 8.22%, while Samsung Electronics rose over 6% to hit fresh records, according to data from FactSet.

The two companies are set to benefit from an OpenAI and Advanced Micro Devices deal that could see Sam Altman's company take a 10% stake in AMD. Shares of AMD rallied on the news and are up more than 40% so far this week.

Nvidia shares are also up 2.6% this week, after CEO Jensen Huang told CNBC that demand has risen in recent months. Huang also confirmed the company's involvement in funding Elon Musk's artificial intelligence startup, xAI, and said that he's "super excited a

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