Korean Chip Giants Surge 12% as US Bond Yields Shift

South Korean chip giants SK Hynix and Samsung Electronics posted massive gains on Thursday, sending the Kospi index up by more than 6 percent. SK Hynix jumped 12 percent after announcing plans to repurchase and cancel 40 trillion won, roughly 28.8 billion dollars, in its own shares. This marks the largest share buyback in South Korean corporate history and aims to boost earnings per share by reducing the supply of outstanding stock.

Yet the massive rally extended to Samsung as well, even though Samsung announced no buyback of its own. Market analysts point to the US bond market as the missing link for the sudden broad recovery. The US Treasury recently stated plans to increase buybacks of long dated government bonds, causing the 30 year yield to drop by about ten basis points.

Falling bond yields reduce borrowing costs, which directly benefits capital heavy industries like artificial intelligence infrastructure. Major tech firms rely on corporate debt to finance costly data center buildouts, competing directly with government bonds for funding. When Treasury yields ease, that financing becomes cheaper and keeps the demand for memory chips strong.

Traders should keep a close eye on US Treasury auctions and inflation prints in the coming weeks. If yields start climbing back toward five percent, borrowing costs for tech expansion will rise again and could put pressure on the broader semiconductor sector.