Fiscal policy affects the foreign exchange market indirectly by changing domestic spending conditions and interest-sensitive capital flows. These shifts can move the exchange rate while also influencing real output and the price level.

Core idea: fiscal policy links the goods market to the currency market

When the government changes spending or taxes, AD changes first. Then, as income, prices, and financial returns adjust, international investors and traders change their demand for the currency, moving the exchange rate.

Key transmission channels to the exchange rate

• Income channel: Higher domestic income increases purchases of foreign goods/services, affecting currency trading for imports.

• Interest-rate/return channel: Fiscal policy can change interest rates (via credit demand and expectations), affecting foreign demand for domestic financial assets.

• Price-level channel: Changes in the price level alter the attractiveness of domestic goods and assets in global markets, influencing currency demand.

Expansionary fiscal policy and exchange rates

Expansionary fiscal policy increases AD, raising real output (at least in the short run) and often raising the price level.

An aggregate demand–aggregate supply (AD–AS) diagram illustrating an increase in aggregate demand (AD shifts right). The new macroeconomic equilibrium occurs at a higher price level and (in the short run) a higher level of real GDP, matching the standard AP interpretation of expansionary fiscal policy raising both output and the price level. Source

These changes can affect exchange rates in competing directions, depending on which channel dominates.

Likely sequence (high-yield AP logic)

• AD increases due to higher $G$ and/or lower $T$.

• Real output rises when the economy has slack; price level rises when the economy is near capacity.

• Higher income tends to increase import spending, increasing the supply of domestic currency in foreign exchange markets (people sell domestic currency to buy foreign currency).

• If expansionary fiscal policy puts upward pressure on interest rates (greater borrowing needs and higher money demand), domestic financial assets may offer a relatively higher return.

• Higher expected returns attract foreign financial capital, increasing demand for the domestic currency and tending to appreciate it.

What AP expects you to state clearly

• Expansionary fiscal policy can raise real output and price level through higher AD.

• It can also lead to currency appreciation if capital inflows (from relatively higher interest rates/returns) outweigh trade-related forces.

Contractionary fiscal policy and exchange rates

Contractionary fiscal policy reduces AD, lowering real output in the short run (if prices are sticky) and reducing inflationary pressure on the price level. Exchange rate effects again depend on the dominant channel.

Likely sequence (high-yield AP logic)

• AD decreases due to lower $G$ and/or higher $T$.

• Real output falls (short run) and the price level rises more slowly or may fall.

• Lower income tends to reduce import spending, decreasing the supply of domestic currency in foreign exchange markets.

• If contractionary fiscal policy reduces pressure on interest rates, domestic assets become less attractive to foreign investors.

• Reduced capital inflows (or capital outflows) decrease demand for the domestic currency, tending to depreciate it.

A standard supply-and-demand model of the foreign exchange market (university lecture slide) that labels the exchange rate on the vertical axis and quantity of foreign exchange on the horizontal axis. It is especially helpful for clarifying how shifts in currency demand/supply translate into appreciation versus depreciation when the exchange rate is quoted as $E=$/€$. Source

What AP expects you to state clearly

• Contractionary fiscal policy can reduce real output and lower the price level (or inflation) by decreasing AD.

• It can also lead to currency depreciation if reduced returns weaken foreign demand for domestic assets.

Why the exchange rate response can be ambiguous (and how to write it)

In AP-style explanations, you earn credit by naming the channel and stating the direction of the exchange rate. The same fiscal policy can push the exchange rate in different directions because:

• The trade-related effect (via income and imports) can differ from the asset-market effect (via interest rates and capital flows).

• The size of the interest-rate response depends on borrowing conditions and how financial markets interpret government deficits/surpluses.

• The economy’s position (recession vs near full employment) changes how much output vs prices respond, which can alter international flows.

Use disciplined wording: “Expansionary fiscal policy increases AD, raising output and the price level; if interest rates rise and capital inflows increase, the currency appreciates.”