Mostly True
A review of 12 primary sources supports the assertion that South Korea's benchmark KOSPI and its two semiconductor heavyweights, Samsung Electronics and SK hynix, are moving in lockstep at levels market watchers describe as "all-time class," effectively turning the daily swings of the chipmakers into the daily swings of the index itself.
The core of the claim held up under scrutiny. Samsung Electronics and SK hynix rank among the largest constituents of the KOSPI by market capitalization, meaning their price moves mechanically shift the benchmark. The review found the relationship goes beyond simple arithmetic weight: the direction of the index has tracked the two semiconductor stocks so closely that observers have characterized the synchronization as historic, a framing captured in the Korean shorthand "์ญ๋๊ธ."
Among the sources examined were SK hynix corporate materials tied to the company's AI infrastructure activities, which illustrate why its influence on the index has grown. The company's central position in AI memory supply has made it a heavyweight whose rallies and pullbacks now move the whole market. Samsung Electronics, the country's largest listed company, anchors the other side of the pairing, and verification of its official newsroom materials was attempted as part of the review, though a collection timeout prevented a second-pass retrieval of its press assets.
The qualifier is where the claim loses some precision. Correlation strength depends on the measurement window and methodology, and the reviewed sources did not establish a single canonical ranking of the current synchronization against every prior market regime. The claim's direction โ that the KOSPI and the two semiconductor stocks are moving together to an unusual degree โ is well supported, but the definitive "greatest of all time" framing rests on rhetoric as much as on a settled statistical record. On that basis, the claim rates as Mostly True.
