Prepared by A-J | Author brand: 盡職生活｜阿J的普通人理財筆記
About the author/site · Vocus @WUCJ ↗ · Editorial policy
Page version: 2026-08-16 | Official or primary sources are preferred for material rules and figures. AI may assist structure, translation, and code, but is not used as the sole factual source.
About the author/site · Vocus @WUCJ ↗ · Editorial policy
Page version: 2026-08-16 | Official or primary sources are preferred for material rules and figures. AI may assist structure, translation, and code, but is not used as the sole factual source.
Key distinction: Market FX, a bank's posted rate, and your executable transaction rate can differ.
International investing contains two moving prices
One is the stock or fund price in USD/JPY; the other is that currency's exchange rate versus TWD.
Asset gain plus foreign-currency strength can amplify TWD returns
Both components can move in the same favorable direction.
Asset gain plus foreign-currency weakness can offset returns
A rising U.S. stock can still produce a smaller TWD return if the dollar weakens materially versus TWD.
Funds add hedged and unhedged share-class considerations
Share-class currency labels do not necessarily equal the underlying portfolio's true currency exposure.
Primary / official sources
Posted rates change continuously. Actual transactions use the rate and fees shown by the executing bank, broker, or payment provider.