6.7 Changes in Policies and Economic Conditions

Loanable Funds & International Effects

Changes in fiscal or monetary policy shift real interest rates, which then move financial capital flows. A rise in U.S. real interest rates attracts foreign investment (increased demand for loanable funds abroad or higher supply here), increasing demand for dollars in the foreign exchange market, appreciating the currency, and worsening net exports.

Policy Changes Ripple Through Markets

Expansionary fiscal policy (higher spending/lower taxes) increases budget deficits, raising government borrowing, pushing real interest rates up. This causes currency appreciation, hurting exports and helping imports, partially offsetting the policy's expansionary effect (crowding out via trade). Contractionary policy works in reverse, depreciating the currency and boosting net exports.

Tracing the Full Chain

AP questions often require tracing multi-step effects: policy change → real interest rate → capital flows → currency supply/demand → exchange rate → net exports → aggregate demand. Practice linking each market (loanable funds, forex, goods market) in the correct causal order, since each step depends on the prior one.

Key terms

Effect of higher real interest rates on capital flows

Higher real interest rates attract foreign investment, increasing capital inflows into the domestic economy.

Effect of currency appreciation on net exports

Appreciation makes exports more expensive and imports cheaper, decreasing net exports.

Expansionary fiscal policy → interest rate → exchange rate chain

Expansionary fiscal policy increases deficits → raises real interest rates → attracts foreign capital → appreciates currency → decreases net exports.

Contractionary monetary policy → currency effect

Raises real interest rates → increases capital inflow → currency appreciates → net exports fall.

Loanable funds market link to forex market

Changes in real interest rates from the loanable funds market shift capital flows, which change currency demand/supply in the foreign exchange market.

Try an AP-style question

Expansionary fiscal policy in the U.S. raises real rates, which causes the dollar to…

1. stay constant
2. depreciate, reducing net exports
3. appreciate, reducing net exports
4. depreciate, raising net exports