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Transcript
Determinants
of the Exchange Rate
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Determinants of the Exchange Rate
• Under a flexible rate system, the exchange
rate is determined by supply and demand.
• The dollar demand for foreign exchange
originates from American demand for foreign
goods, services, & assets (real or financial).
• The supply of foreign exchange originates
from sales of goods, services, & assets from
Americans to foreigners.
• The foreign exchange market brings the
quantity demanded and quantity supplied
into balance.
• As it does so, it brings the purchases by
Americans from foreigners into equality
with the sales of Americans to foreigners.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Foreign Exchange Market Equilibrium
• The dollar price of the English
pound is measured on the vertical
price of
axis. The horizontal axis indicates Dollar
foreign exchange
(for pounds)
the flow of pounds to the foreign
exchange market.
• The demand and supply of pounds
are in equilibrium at the exchange
rate of $1.50 = 1 English pound.
• At this price, quantity demanded
$1.80
equals quantity supplied.
• A higher price of pounds (like
$1.50
$1.80 = 1 pound), would lead to
an excess supply of pounds ...
$1.20
causing the dollar price of the
pound to fall (depreciate).
• A lower price of pounds (like
$1.20 = 1 pound), would lead to
an excess demand for pounds …
causing the dollar price of the
pound to rise (appreciate).
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S(sales to
foreigners)
Excess supply
of pounds
e
Excess demand
for pounds
D(purchases from
foreigners)
Q
Quantity of
foreign exchange
(pounds)
Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Changes in the Exchange Rate
• Factors that cause a currency to depreciate:
• A rapid growth of income (relative to trading
partners) that stimulates imports relative to
exports.
• A higher rate of inflation than one's trading
partners.
• A reduction in domestic real interest rates
(relative to rates abroad).
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Foreign Exchange
Market Equilibrium
• Other things constant, if incomes
increase in the United States, U.S.
imports of foreign goods and
services will grow.
• The increase in imports will
increase the demand for pounds
(in the foreign exchange market)
causing the dollar price of the
pound to rise from $1.50 to $1.80.
Dollar price of
foreign exchange
(for pounds)
S(sales to
foreigners)
$1.80
$1.50
b
a
D2
D1
Q1 Q2
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Quantity of
foreign exchange
(pounds)
Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Inflation With
Flexible Exchange Rates
• If prices were stable in England
while the price level in the U.S.
increased by 50 percent …the
U.S. demand for British goods
(and pounds) would increase …
as U.S. exports to Britain would
be relatively more expensive they
would decline and thereby cause
the supply of pounds to fall.
• These forces would cause the
dollar to depreciate relative to
the pound.
S2
Dollar price of
foreign exchange
(for pounds)
S1
$2.25
b
$1.50
a
D2
D1
Q1
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Quantity of
foreign exchange
(pounds)
Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Changes in the Exchange Rate
• Factors that cause a currency to appreciate:
• A slower growth rate relative to one’s trading
partners.
• A lower inflation than one's trading partners.
• An increase in domestic real interest rates
(relative to rates abroad).
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Balance of Payments
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Balance of Payments
• Any transaction that creates a demand for
foreign currency (and a supply of the domestic
currency) in the foreign exchange market is
recorded as a debit item.
Example: Imports
• Transactions that create a supply of foreign
currency (and demand for the domestic
currency) on the foreign exchange market are
recorded as a credit item.
Example: Exports
• Under a pure flexible system, the quantity
demanded will equal the quantity supplied
in the foreign exchange market.
• Thus, in the balance of payments accounts:
total debits = total credits
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Balance of Payments
• Current account transactions:
All payments (and gifts) related to the purchase
or sale of goods and services and income flows
during the current period.
• 4 categories of current account transactions:
• Merchandise trade
(import and export of goods)
• Service trade
(import and export of services)
• Income from investments
• Unilateral transfers
(gifts to and from foreigners)
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Balance of Payments
• Capital account transactions:
Transactions that involve changes in the
ownership of real and financial assets.
• The capital account includes both
• Direct investments by foreigners in
the U.S. and by Americans abroad, and,
• Loans to and from foreigners.
• Under a pure flexible-rate system, official
reserve transactions are zero; therefore:
• a current-account deficit implies
a capital-account surplus.
• a current-account surplus implies
a capital-account deficit.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
U.S. Balance of Payments, 2000*
Debits
Current account:
1. U.S. merchandise exports
2. U.S. merchandise imports
3. Balance of merchandise trade (1 + 2)
4. U.S. service exports
5. U.S. service imports
6. Balance on service trade (4 + 5)
7. Balance on goods and services (3 + 6)
8. U.S. investment income on U.S. assets abroad
9. Foreign income on foreign assets in the U.S.
10. Net investment income (8 + 9)
11. Net unilateral transfers
12. Balance on current account (7 + 10 + 11)
Capital account:
13. Foreign investment in the U.S. (capital inflow)
14. U.S. investment abroad (capital outflow)
15. Balance on capital account (13 + 14)
Official Reserve Transactions:
16. Official reserve account balance
Credits
deficit (-) / surplus (+)
+ 772.2
- 1224.4
- 452.2
- 217.0
+ 293.5
+ 76.5
- 375.7
- 367.7
+ 352.9
- 14.8
- 54.1
- 444.7
+ 986.6
-579.3
+ 407.3
+ 37.3
0.0
17. Total (12 + 15 + 16)
Source: http://www.bea.doc.gov.
* Figures are in Billions of Dollars
Balance
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
More Trade Fallacies
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Trade Fallacies
• As we discussed in the last chapter, fallacies
abound in the area of trade. We consider
two fallacies related to trade balances.
• Trade balance fallacy 1:
“A trade deficit is bad. It is indicative of a
weak economy.”
• An inflow of capital implies a trade deficit;
an outflow of capital implies a trade surplus.
• While the term “deficit” generally has
negative connotations this is not necessarily
true for a trade deficit.
• Rapid economic growth and an inflow of
capital will cause a nation’s currency to
appreciate, which will shift its trade balance
toward a deficit.
(continued)
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Trade Fallacies
• Trade balance fallacy 1:
“A trade deficit is bad. It is indicative of a
(continued)
weak economy.”
• Although they often cause trade (and current
account) deficits, both rapid growth and a
healthy investment environment are signs of
a strong economy, not a weak one.
• A trade deficit (or surplus) is an aggregate that
reflects the voluntary choices of individuals
and businesses. In contrast with a budget
deficit, no legal entity is responsible for the
trade deficit.
• The trade deficits of the U.S. during the 1980s
and 1990s were largely the result of rapid
growth and a favorable investment climate.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Trade Fallacies
• Trade balance fallacy 2:
“If the trade policies of another country are
fair, our exports to them should be about
equal to our imports from them.”
• Under a flexible exchange rate system,
overall purchases from foreigners will
balance with overall sales to foreigners, but
there is no reason why the bilateral trade
between two countries will balance.
• A country will tend to experience
• trade surpluses with trading partners that
buy a lot of goods that it supplies at a low
cost, and,
• trade deficits with partners that are
economical suppliers of goods that can be
produced domestically only at a high cost.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Macroeconomic Policy
in an Open Economy
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Thomson Learning. All rights reserved.
Monetary Policy & the Exchange Rate
• An unanticipated shift to a more restrictive
monetary policy will:
• raise the real interest rate,
• reduce the rate of inflation, and,
• at least temporarily, reduce aggregate
demand and the growth of income;
• causing an appreciation in domestic currency.
• the currency appreciation (with shift the
current account toward a deficit).
• An unanticipated shift to more expansionary
monetary policy will cause the opposite:
•
•
•
•
lower interest rates, and,
an outflow of capital;
leading to a currency depreciation, and,
a shift toward a current account surplus.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Fiscal Policy & the Exchange Rate
• An unanticipated shift to more expansionary
fiscal policy will:
• increase real interest rates,
• leading to an inflow of capital;
• these factors will cause the nation’s current
account to shift toward a deficit.
• The effects of a more restrictive fiscal policy
will be just the opposite:
• lower interest rates,
• leading to an outflow of capital;
• these factors move the economy toward a
current account surplus.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Macro Policy, Exchange
Rates, Capital Flows, and
Current Account Deficits
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Market Interaction
• More restrictive monetary
policy coupled with
expansionary fiscal policy
will cause:
• higher real interest rates,
• an inflow of capital,
• currency appreciation,
• & current account deficit.
• This policy combination
was followed in the early
1980s.
Real exchange rate
trade weighted value of the dollar, 1/97 = 100
120
100
80
60
40
20
1975
1980
1985
1990
1995
2000
1995
2000
Current Account as % of GDP
surplus (+) or deficit (-)
2
0
-2
-4
1975
Note: shaded regions denote
periods of recession.
1980
1985
1990
Net Foreign Investment as % of GDP
surplus (+) or deficit (-)
4
2
0
-2
1975
1980
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1985
1990
1995
2000
Copyright 2003 South-Western
Thomson Learning. All rights reserved.
How Do Current Account
Deficits Affect the Economy?
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Current Account Deficits
and the Economy
• Under a flexible exchange rate system:
• An inflow of capital implies a current
account deficit; an outflow of capital
implies a current account surplus.
• A trade deficit is not necessarily bad.
• Rapid growth stimulates imports.
• A healthy growing economy that offers
attractive investment opportunities often
generates an inflow of capital.
• These factors are not bad. However, both
often cause current account trade deficits.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Current Account Deficits
and the Economy
• A nation’s trade deficit (or surplus) is an
aggregation of the voluntary choices of
businesses and individuals.
• In contrast with a budget deficit, there is no
legal entity responsible for the trade deficit.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
International Finance and
Exchange Rate Regimes
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Exchange Rate Regimes
• Three major types of exchange rate regimes:
• flexible rates,
• fixed-rate (unified currency), and,
• pegged exchange rates.
• To this point we have discussed flexible
exchange rate regimes extensively.
• Examples of a fixed rate (unified) system:
• Nations of the European Union have recent
adopted a unified currency system.
• A country can also use a currency board to
unify its currency with another.
• The currencies of Hong Kong, El Salvador,
and Panama are unified with the U.S. dollar.
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Copyright 2003 South-Western
Thomson Learning. All rights reserved.
Exchange Rate Regimes
• Pegged exchange rate systems:
• A nation can either:
• follow an independent monetary policy,
allowing its exchange rate to fluctuate, or,
• tie its monetary policy to the maintenance
of the fixed exchange rate.
• It cannot, however:
• maintain currency convertibility at a fixed
exchange rate while following a monetary
policy more expansionary than that of the
country to which its currency is tied.
• Attempts to peg rates and follow a monetary
policy that is too expansionary have led to
several recent financial crises—a situation
where falling foreign reserves eventually
force the country to forego the pegged rate.
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