SK Hynix
SK Hynix had its best day on record in South Korea on Friday as chipmakers rebound following a sharp rout. Getty Images

SK Hynix and Samsung saw their best day on record in South Korea on Friday as chipmakers rebound following a sharp rout.

The former jumped almost 30%, while the latter did so about 27%. CNBC detailed that LG Innoteck gained more than 20% and Seoul Semiconductor 15%. Shares of Japanese chipmakers also soared, and Taiwan's TSMC climbed almost 10%, and the iShares Semiconductor ETF did so 8%.

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Samsung said the AI boom that has powered the company is far from reaching its peak, warning that tight supplies of advanced memory chips could persist until at least 2028.

The South Korean technology giant this week delivered another record quarter, reporting operating profit of 89.5 trillion won ($118.7 billion) on revenue of 171.5 trillion won, extending a run of earnings driven largely by demand for AI memory products.

The company also raised expectations for the second half of the year, saying investment in AI data centers and enterprise computing continues to support strong orders for high-bandwidth memory (HBM), server DRAM and enterprise solid-state drives, Samsung said in its second-quarter earnings release.

The outlook matters well beyond Samsung's balance sheet. The company is one of the world's largest suppliers of memory chips used in AI servers, competing alongside SK Hynix and Micron Technology to supply the components powering Nvidia's latest AI accelerators and hyperscale data centers.

SK Hynix also reported its second-quarter earnings on Wednesday, but failed to satisfy analysts' expectations. Revenue climbed 257% year-on-year while operating profit jumped 557%. Revenue increased 51% and the operating profit 61%.

At the same time, results are becoming a make or break moment for companies in the U.S. Amazon stocks are soaring and Apple's are plunging after their reporting different situations at their respective results on Thursday. The former issued weak guidance for the third quarter, while the latter's cloud computing business saw the strongest expansion since 2021.

Apple's stock fell 7% after citing "supply constraints" even though its earnings, revenue and iPhone sales were above market expectations. The company noted that revenue growth will stand between 9% and 11%, below analysts' expectations that it would stand at 12%.

Other large companies have seen wild swings after their earnings report. Microsoft soared more than 15% after impressing Wall Street with stronger-than-expected fiscal fourth-quarter results, fueled by continued momentum in its cloud computing and AI businesses.

Samsung