Won strengthens for a fifth session as exporters sell dollars into a firmer greenback
South Korea's won rose for a fifth straight session to 1,338.5 per dollar on Oct. 8 even as foreigners sold about 2 trillion won of Korean shares. Seoul Economic Daily credits exporters converting chip-export dollars, so the rally holds only as long as that selling outweighs a firmer greenback.
The Investor · Invest desk
What happened
- The won touched 1,336.3 per dollar in morning trading, its strongest level since Sept. 10, before paring part of the gain.
- Bank of Korea data showed an August current account surplus of $46.11 billion, the second-largest monthly figure on record and the third straight month above $40 billion.
- Samsung Electronics disclosed the same day that third-quarter operating profit rose 782% from a year earlier to 107.4 trillion won.
- U.S. 10-year and 30-year Treasury yields climbed overnight to 5.36% and 5.73%, their highest since 2002.
- The KOSPI fell 2.62% to 6,625.93 as foreign and institutional investors sold together.
Why it matters
- What it limits constraint Foreign stock sales on the Oct. 8 scale are too small to undo the won's gains by themselves while exporters keep converting a surplus running above $40 billion a month.
- Who's exposed exposure Part of the support came from foreign sales of dollar futures, a position traders can unwind in any session, so the won is exposed to positioning as well as to trade flows.
- Who has to decide decision Dollar buyers waiting for a much stronger won are betting against market participants who, citing high oil prices and elevated rates, expect trading around the upper 1,330s instead of a sharp rally.
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Hot US inflation hit a Kospi whose 55 trillion won of chipmaker buybacks had wound downConfirmed4 publishers
The move was small, and its direction was the odd part. The won gained 1.9 won from a previous close of 1,340.4, about 0.14% [18]. The dollar index rose 0.175 point to 102.288 the same day, roughly 0.17% against six major currencies [5][19]. Against that basket the won outperformed by about 0.3 percentage points [20].
Scale explains most of it, or rather the scale of the surplus does, if exporters convert it. Yonhap put the day's foreign equity sale at about $1.5 billion [3]. Set against August's $46.11 billion surplus [11], the sale equals about 3% of one month [21], and selling at that pace would take roughly 31 sessions to match it [22]. With the surplus above $40 billion for three straight months, the total since June exceeds $120 billion [23].
A surplus is an accounting total. It becomes demand for won only when exporters sell their dollars. Seoul Economic Daily reported that they did, saying strong semiconductor exports kept a lid on the dollar-won rate as exporters converted proceeds [6]. The same report named a second seller, foreign investors in dollar futures [7]. It said the won rose because the two together exceeded market demand for dollars [8], but it did not split that total between them. Yonhap described the gain as coming amid broad dollar strength, with Fed minutes signaling inflation risks [9].
In my view the exporter explanation is right about direction, given the size of the surplus. The stronger claim, that chip conversion dominates the won, rests on that size alone. Exporters are also converting while holding dollars pays well: U.S. 10-year yields above 5% [13] are a return they give up on every dollar they sell. Samsung's profit jump implies a year-earlier operating base near 12.2 trillion won [24]. Seoul Economic Daily said strong exports and improving earnings raised expectations that dollar selling could continue for some time [14].
If conversion continues, the won tests the 1,334 range that market participants cite as the next support, 3.9 won from the close and set by the year's best of 1,334.6 on Sept. 9 [15][25]. A Fed increase, a possibility the September minutes reaffirmed for this year [10], would lift yields and push the dollar-won rate back above 1,340. A longer run of foreign equity selling is the third route.
The exporter thesis has a plain failure test. If the next current account release stays above $40 billion and the won still drifts back above 1,340, exporters were not the marginal seller on Oct. 8, and the support came from foreign futures sellers.
What to watch
- Policy signals from Prime Minister Sanae Takaichi's government, which has distanced itself from reflationary policy and is seen as a variable for Asian currencies including the won.
- Demand at coming U.S. Treasury auctions, since long yields at their highest since 2002 are the main force pulling the other way on the won.
Information, not investment advice. This story is general information about companies and markets, drawn from cited reporting. It is not a recommendation to buy, sell or hold any security; check the cited sources before acting.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence70
- Adoption
- Not scored
- Hype gap+10
- Incentives
- Not scored
- Confidence65
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
The won closed at 1,338.5 per dollar in the Seoul foreign exchange market on Oct. 8, up 1.9 won from the previous session, its fifth consecutive daily gain.
- [2]
The won firmed to 1,336.3 per dollar around 9:21 a.m., its strongest level since 1,336.2 on Sept. 10, then pared its gains and traded in the upper 1,330s.
- [3]
Foreigners sold about 2 trillion won (US$1.5 billion) worth of local shares during the latest regular trading session.
- [4]
The KOSPI fell 2.62% to 6,625.93 as foreign and institutional investors sold in tandem.
- [5]
The dollar index, which measures the greenback against six major currencies, rose 0.175 point to 102.288.
- [6]
Dollar selling by exporters drove the won's advance; strong semiconductor exports kept a lid on the dollar-won rate as exporters converted their proceeds.
- [7]
Foreign investors' sales of dollar futures also supported the won.
- [8]
The won strengthened because dollar selling by exporters and foreign sales of dollar futures exceeded market demand for the U.S. currency.
- [9]
The won's gain came amid the broad strength of the U.S. dollar, with Fed minutes released overnight showing policymakers signaled inflation risks.
- [10]
Minutes from the Federal Reserve's September policy meeting reaffirmed the possibility of a further rate increase this year.
- [11]
South Korea's current account surplus reached $46.11 billion in August, according to Bank of Korea data, the second-largest monthly figure on record and the third straight month above $40 billion, supported by strong chip exports.
- [12]
Samsung Electronics disclosed that third-quarter operating profit surged 782% from a year earlier to 107.4 trillion won.
- [13]
U.S. 10-year and 30-year Treasury yields climbed overnight to 5.36% and 5.73%, the highest since 2002, later retracing part of those gains after strong auction results.
- [14]
Strong exports and improving corporate earnings raised expectations that dollar selling could continue for some time.
- [15]
The year's strongest level for the won was 1,334.6 per dollar on Sept. 9; market participants cite the year's low in the 1,334 range as the next support level.
- [16]
With high oil prices and elevated interest rates persisting, the won is seen more likely to fluctuate around the upper 1,330s than to appreciate sharply in the near term.
- [17]
The government of Prime Minister Sanae Takaichi has issued messages distancing itself from reflationary policy, a shift seen as a variable that could affect Asian currencies.
- [18]
Previous close was 1,340.4 won per dollar, so the 1.9-won gain was about 0.14%.
- [19]
The dollar index rose about 0.17% from a prior level of 102.113.
- [20]
Against the dollar index basket, the won outperformed by roughly 0.3 percentage points on the day.
- [21]
The roughly $1.5 billion foreign equity sale equals about 3% of August's current account surplus.
- [22]
Foreign equity selling at about $1.5 billion a session would take roughly 31 sessions to match one August surplus.
- [23]
Three straight months above $40 billion puts the June-August surplus above $120 billion.
- [24]
Samsung's year-earlier third-quarter operating profit was about 12.2 trillion won.
- [25]
The won's close was 3.9 won short of the year's strongest level.
Sources
2 independent publishers whose own reporting we read for this story.
- en.sedaily.comWon Nears Year's Low as Exporters Sell Dollars
1 article · October 8, 2026
- en.yna.co.krS. Korean won rises against U.S. dollar
1 article · October 8, 2026
Topics and entities
Topics
- South Korea current account
- US Monetary Policy
- Korean won exchange rate
- Foreign flows in Korean equities