AI-generated conceptual image; not a photograph of an actual event.
Reporting cutoff: October 22, 2026, 11:30 KST (UTC+9). Event, release and data periods are identified below.
The dollar return looks healthy. The amount available for rent in Seoul does not. For an investor who earns and spends Korean won, the exchange rate is part of the investment outcome, not an optional footnote.
A market quote is not your personal exchange-rate return
October 21 closing coverage put the won-dollar rate at KRW1,325.2 per USD for Seoul’s daytime close. That snapshot cannot establish an investor’s currency gain or loss without the purchase rate, holding period and actual conversion terms. It also cannot describe everyone who owns U.S. equities.
A hypothetical calculation, with the assumptions exposed
Suppose a saver converts KRW1.5 million at KRW1,500 per dollar, receiving $1,000. A hypothetical stock basket rises 10%, with no dividend, to $1,100. If the ending rate is KRW1,350 per dollar, the investment converts to KRW1.485 million: a KRW15,000 loss, or minus 1%. These are invented inputs for explanation, not a real security’s historical performance.
The formula is (1 + dollar asset return) × (ending KRW-per-USD rate ÷ starting rate) − 1. Here, 1.10 × 0.90 − 1 = −1%. With an ending rate of KRW1,650 instead, the return becomes 1.10 × 1.10 − 1 = 21%. Currency and asset returns compound rather than simply add.
Both examples exclude exchange spreads, commissions, taxes and dividends. An account’s indicative conversion rate may also differ from the rate available when money is actually exchanged. An unrealized translated balance is not the same as realized proceeds after costs.
Interpretation: the first dollar you bought can become an anchor
Tversky and Kahneman’s 1974 research discusses anchoring in judgment. Applied to currency decisions, a past conversion rate can become a personal definition of fair value. That does not make it an estimate of the next exchange rate. The application here is the author’s interpretation, not a diagnosis of individual traders.
Judging yourself against the best possible stock entry and the best possible currency conversion creates an impossible benchmark. It also overlooks spending needs. Someone saving for U.S. tuition has a different currency liability from someone planning retirement withdrawals in Korea.
The investment channel—and its limits
Won appreciation can reduce the translated value of dollar assets while improving purchasing power for imported goods. Won depreciation can do the reverse. Corporate operating currencies add another layer: the currency in which a stock trades does not describe all the currencies in which the business earns revenue.
A Korea-listed overseas ETF is not automatically currency-hedged merely because it trades in won. Hedging may reduce exposure, but costs and imperfect tracking remain; it does not improve returns in every scenario. A useful policy starts with future spending currency and time horizon rather than an attempt to erase regret about the last conversion.
Before you act
- Identify the currency used for the displayed account return.
- Check actual starting and ending rates and conversion spreads.
- Confirm treatment of dividends, commissions and taxes.
- Read the fund’s hedging policy and match exposure to future spending.
Sources and dates
Editorial note: Psychology passages are the author’s interpretation; market channels and counter-scenarios are conditional analysis, not established explanations of any individual trade.
AI-generated conceptual image; not a photograph of an actual event.
Related analysis: Earlier reporting and valuation context
한국어 기사: 미국 주식은 10% 올랐는데 내 돈은 줄었다…환율이 바꾸는 수익률
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