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.
A bilateral rate only compares two currencies
USD/TWD describes the TWD-dollar relationship rather than TWD versus every currency.
NEER uses a basket of trading-partner currencies
Taiwan's central bank describes NEER as a weighted average of TWD exchange rates against major trading partners.
TWD can weaken versus USD but strengthen versus another currency
Relative moves among the dollar, yen, euro, and other currencies can differ.
NEER is a macro indicator, not a retail exchange quote
It helps analyze overall currency strength but cannot tell you a bank's executable customer rate.
Primary / official sources
Posted rates change continuously. Actual transactions use the rate and fees shown by the executing bank, broker, or payment provider.