Cintrini's Jukan, citing Citi sales desk, says "The current sell-off in Korean memory stocks is being driven by a rumour that the US is preparing tariffs targeting Korean semiconductors"

Tariff-driven rumour selling in Korean memory names is a well-established pattern: sector-specific tariff speculation out of Washington has repeatedly hit the large-cap Korean semiconductor complex first, given its concentration in a handful of index-heavyweight names and its weight in regional benchmarks, with the move typically outsized relative to any confirmed policy detail. The sourcing here matters: a sales-desk attribution passed through a third-party commentator sits low on the rumour reliability scale, and comparable episodes have tended to see the initial leg retrace partially once the story is either denied, diluted into a broader trade review, or left unconfirmed into the next session. The transmission channel runs through export exposure to US demand and the uncertainty over scope, whether any measure targets memory specifically, the broader chip complex, or finished electronics, with each case carrying very different earnings arithmetic for the two dominant Korean producers versus their Taiwanese and US peers. The tells in past episodes of this kind have been official comment from either trade ministry, any filing or notice in the US rulemaking process, and whether the selling stays confined to the named complex or bleeds into the wider supply chain and won. Until one of those confirms, the tape is trading positioning and headline sensitivity rather than policy.