Asian Chip Stocks Slide as China Fears Hit AI Trade, While SK Hynix Unveils $28.6 Billion Buyback

Samsung Electronics and SK Hynix fell more than 7% in Seoul on Aug. 19, extending a global retreat from semiconductor stocks that had powered the artificial intelligence trade. The decline followed losses in U.S. chipmakers and pulled South Korea’s benchmark lower as investors reassessed valuations and China’s growing competitive threat.

The move followed a broader July selloff that erased more than $1 trillion from the market value of leading chip companies. Nvidia lost $238 billion, while SK Hynix, Samsung and Micron shed $176 billion, $173 billion and $113 billion, respectively. Asian technology shares later rebounded sharply in one session, with SK Hynix gaining more than 8% after its U.S.-listed shares rose over 27%, underscoring the market’s unusually rapid swings.

China-related competition fears are driving the latest pressure on Samsung and SK Hynix, whose earnings depend heavily on memory chips used in AI servers. Investors are questioning how durable the sector’s premium valuations remain as chip supply expands and Chinese producers seek a larger role in the market.

The retreat has spread beyond memory makers. Nvidia led the earlier U.S. decline, while Micron also suffered a large market-cap loss, linking the Korean selloff to a wider reset across companies associated with AI infrastructure. The two-day slide in Asian chip stocks has raised concern that U.S. semiconductor shares could face additional pressure if the same trade unwinding continues across markets.

SK Hynix announced a 40 trillion won, or about $28.6 billion, share buyback on Aug. 19, pairing the plan with a higher shareholder-return target. The company said the program reflects profits generated by strong demand for memory used in AI systems, even as its stock was being hit by the broader selloff.

The buyback is designed to support the stock by reducing shares outstanding and returning cash to investors. SK Hynix also plans to direct more than 50% of free cash flow to shareholders, according to Nikkei Asia. The announcement followed investor expectations that the company would disclose buybacks and other details of a broader capital-return policy, which helped lift the shares in an earlier session.

SK Hynix is pursuing the buyback while expanding production capacity, creating a tension at the center of the memory-chip cycle. The company is using AI-driven demand to justify investment in additional output, while investors are demanding evidence that supply growth won't weaken pricing and margins.

That tension matters for Samsung as well. Samsung shares had more than doubled earlier in the year before falling 8.3% during a July technology-stock decline, while the Kospi dropped 6.7% in the same session. The companies remain central suppliers to the AI hardware chain, but their share prices now reflect both strong demand and sharper concerns about competition, inventory and valuation.

Semiconductor investors are facing rapid reversals rather than a single, orderly trend. SK Hynix gained more than 8% during a July rebound after U.S. chip stocks recovered, then joined Samsung in a later slump as the market’s AI trade came under renewed pressure.

For investors, the immediate test is whether buybacks and strong AI memory demand can offset fears about Chinese competition and a broader rotation away from high-performing technology shares. For chip companies, the selloff raises the cost of aggressive capacity plans and puts greater emphasis on cash discipline. The next moves in Nvidia, Micron, Samsung and SK Hynix will show whether the retreat is a temporary valuation reset or a deeper challenge to the AI hardware cycle.

The semiconductor sector now faces two linked questions: whether AI infrastructure spending remains strong enough to absorb new memory capacity, and whether China’s chip ambitions will pressure established suppliers. SK Hynix’s buyback provides a direct answer to shareholder concerns, but it doesn't resolve questions about demand durability or competitive pricing.

Market attention will remain on earnings, capital spending, memory prices and evidence of customer demand. Samsung’s and SK Hynix’s ability to sustain profits while funding capacity expansion will shape sentiment across Asian technology markets. The scale of SK Hynix’s return plan gives investors a concrete cash-flow signal, while the wider selloff keeps the sector’s dependence on the AI investment cycle in plain view.