Korean Won at a Two-Year High as Foreigners Sell Seoul Stocks: Reading Competing Flows

Key takeaways

1. USDKRW fell to 1,333.2 around 00:56 UTC, the won's strongest level since October 2024, while foreigners sold 699.27 billion won of Korean stocks.

2. Record exports of $26.1 billion for 1–10 October, led by a 170.9% rise in chip shipments, supplied the won demand that offset equity outflows.

3. Separate trade flows from portfolio flows before explaining a move, because sticky export conversion can outweigh fast equity selling for a time.

The development

The Korean won reached its strongest level against the US dollar in about two years on Monday, even as foreign investors sold Korean equities heavily. Yonhap reported that USDKRW opened the Seoul session at 1,342.5 and fell to 1,333.2 at around 00:56 UTC, the lowest dollar–won rate since the 1,331.3 low of 4 October 2024. The pair was 1,336.7 at 02:10 UTC. In the same morning, the KOSPI fell 2.28% to 6,474.95 by 00:15 UTC, with foreigners net sellers of 699.27 billion won (about $524 million), led by chip stocks (Yonhap).

The currency's support came from trade. Korea Customs Service data released Monday showed exports of $26.1 billion for 1–10 October, more than double a year earlier and a record for the period. Chip exports rose 170.9% to $12.1 billion, and the period produced a $3.8 billion trade surplus (Yonhap). A Woori Bank economist told Chosun Biz that exporters' dollar selling has shifted from month-end bursts to a year-round pattern.

Market transmission

A currency price is the net result of many flows. Two pulled in opposite directions this morning. Exporters converting dollar receipts into won add steady demand for the won. Foreign investors selling Korean shares and repatriating proceeds add demand for dollars. On Monday, the trade flow outweighed the portfolio flow, helped by a slightly softer dollar index (DXY), which Yonhap quoted at 102.133. The won also traded near 845 per 100 yen, close to its January 2008 extreme of 833.40, which shows the move was not only a dollar story.

What to monitor next

• Foreign net equity flows at the Seoul close, around 06:30 UTC. Persistent selling on this scale tests the trade-flow support.

• Whether the October 2024 extreme in USDKRW is revisited, which would mark a fresh multi-year won high.

• Chip-sector equity performance, since the same sector drives both the export inflow and the equity outflow.

• US September CPI on Wednesday at 12:30 UTC, the week's main input for the dollar leg.

• Brent crude: Korea is a major crude importer, so a renewed spike would weigh on the trade balance.

Reusable lesson

When a currency and its stock market move in opposite directions, list the flows before you choose a story. Separate current-account flows (exports, imports, dividends) from portfolio flows (equities, bonds). Then ask which is larger and which is more persistent. Trade flows tend to be slower but sticky. Portfolio flows can be large and reverse within a day. A currency held up by exporters can stay firm through an equity sell-off, but a sharp exit from bonds as well as stocks would change the arithmetic.

Invalidation and risk

The narrative of export strength outweighing equity outflows fails if foreign selling spreads from equities to Korean government bonds, or if the chip-stock decline signals a peak in the export cycle rather than a valuation correction. A hot US CPI print that lifts the dollar broadly would also test the move. The early data cover only ten days and can be revised in the full-month release.

Glossary

Current-account flow: Currency demand or supply arising from trade in goods and services, income and transfers, such as exporters converting dollar receipts.

Portfolio flow: Cross-border buying or selling of financial assets such as shares and bonds, which can reverse quickly.

Repatriation: The conversion of sale proceeds or earnings back into an investor's home currency.

Sources

Yonhap News Agency (2026-10-12): Won-dollar rate falls to 1,333.2 won, lowest in about two years (Korean-language report)

Yonhap News Agency (2026-10-12): Seoul shares extend losses late Mon. morning on tech sell-off

Yonhap News Agency / Korea Customs Service data (2026-10-12): (LEAD) Exports double in first 10 days of October on chips

Chosun Biz (2026-10-12): Won falls as bond yields, oil rise and chip stocks lag

Disclaimer

This note is provided by the SummitFx Project for general education and market context only. It is not investment advice, not a solicitation to buy or sell any instrument, and not a personal recommendation. Foreign exchange and related markets are leveraged and can result in the loss of some or all of your capital. Figures are believed accurate at the time of research and may already be stale. Always verify live prices, official releases, and your own risk limits before acting. Past market behaviour does not determine future results.