Which would depreciate a currency?

Question

BlackTom AI · Accepted Answer

Higher domestic inflation and a fall in domestic interest rates both lead to depreciation of a currency.

Relevant concepts:
- Purchasing Power Parity (PPP): a currency with higher inflation than its trading partners loses purchasing power and tends to depreciate by roughly the inflation differential.
- Capital flows and interest-rate differentials: lower domestic interest rates make domestic financial assets less attractive, causing capital outflows, increased supply of the domestic currency in FX markets, and downward pressure on its exchange rate.
- Supply-demand in the foreign exchange market: anything that increases supply or reduces demand for a currency causes depreciation.

Step-by-step reasoning and numerical illustrations:
1) Inflation channel (PPP): suppose domestic inflation = 5% and foreign inflation = 2%. To restore relative purchasing power, the domestic currency must depreciate by about the inflation gap: 5% − 2% = 3%. That 3% depreciation offsets higher domestic price growth so international prices remain consistent in real terms.

2) Interest-rate/capital flow channel: suppose a domestic deposit yields 1% while a comparable foreign deposit yields 4%. Investors shift funds to the foreign deposit, selling domestic currency to buy foreign currency. The resulting increased supply of domestic currency and higher demand for foreign currency push the domestic currency down. Markets will typically move the exchange rate until expected currency changes and interest differentials are balanced (so the currency depreciates until expected returns align).

Why the correct option (both of these) is correct:
- Both mechanisms independently create downward pressure on the currency: higher inflation erodes real value; lower interest rates trigger capital outflows. When both occur, the depreciation pressure is reinforced.

Why the other choices would be wrong:
- Choosing only the inflation item or only the interest-rate item is incomplete because each by itself causes depreciation; saying “neither” contradicts empirical theory and market mechanics. The option that both cause depreciation is therefore the correct and complete choice.

Final confirmation: the correct answer is “both of these.”

Which would depreciate a currency?单项选择题

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