[術語] devaluation 不等於 depreciation
簡單來說，devaluation 是刻意為之，例如希臘如果退出歐元區，就可將希臘貨幣刻意貶值，以此減債。（是一種 currency re-valuation，台灣在全面換成 新台幣 的時候，也是這樣）
depreciation 則是一般匯市波動下的匯率下降。
NY Times這篇寫得很清楚：
Many writers treat devaluation and depreciation as synonymous. This may be what confused Mr. Harrington. Clarity dictates restricting devaluation to a deliberate change in the official value of a currency like that of the dollar in 1933-34. Depreciation is the right word for a fall in the price of one currency in terms of the currencies of other countries in response to supply and demand.
Source: Dollar's Depreciation Isn't Devaluation
Published: February 22, 1988
其他可參考之文章：
Economics Questions
- eHow.com
Depreciation vs. Devaluation of Currency
- Devaluation and Depreciation Definition (Economics Help blog)
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