Won Slips to 1,419.4 at Seoul Close, Then Breaks 1,420 in Late Trading

The Korean won lost ground against the dollar on August 13, with the dollar-won rate set at 1,419.4 at the 3:30 p.m. daytime close in Seoul — a rise of 3.7 won from the previous session — before pushing through the 1,420 mark once regular hours ended.

A Closing Benchmark Just Shy of the Line

The 3:30 p.m. rate is the daytime session’s official closing benchmark, and Wednesday’s fix at 1,419.4 implies a move up from roughly 1,415.7 a session earlier. The 3.7-won advance left the pair within touching distance of 1,420 at the bell, so the breach that followed in after-hours dealing required only modest additional dollar demand.

The Break Came After Hours

Seoul’s onshore interbank market no longer stops at mid-afternoon; since the 2024 extension of trading hours, dollar-won deals run deep into the night. That structure is why the day’s most notable price action — the move above 1,420 — happened after the daytime close rather than in it. The official benchmark still reads 1,419.4, but the market’s last word on the day was weaker.

Whether 1,420 Holds Is the Question

Round numbers matter in currency trading less for their arithmetic than for the orders clustered around them, and 1,420 is the kind of level that draws stop-losses, exporter selling, and — at the extreme — official attention. A late-session poke above the line can fade by the next morning’s open. The more telling reading will come from the next daytime benchmark: a fix above 1,420 would confirm the won has settled into weaker territory, while a pullback would mark the after-hours move as an overnight overshoot rather than a level change.