Why exchange rate matters
Exchange rates translate international assets, trade, income, and liabilities into a common currency. Even unchanged local prices can create gains or losses for foreign investors.
How it is applied
Analysts identify base and quote currencies, calculate cross-rates, distinguish spot and forward rates, and separate local-asset return from currency return.
Portfolio example
If USD/JPY rises from 150 to 156, one dollar buys more yen. The dollar appreciated about 4% against the yen under that quotation.
How to interpret it
Every appreciation is simultaneously another currency’s depreciation. A higher numerical quote has meaning only after the convention is known.
Limitations and common misconceptions
Bid-ask spreads, settlement dates, controls, offshore markets, and multiple official rates complicate comparisons. Percentage moves are not perfectly symmetric.
Sources and further reading
- Triennial Central Bank Survey of Foreign Exchange and OTC Derivatives MarketsBank for International Settlements
- Exchange RatesInternational Monetary Fund
- Currency Exchange RatesCFA Institute