FINS1612 Chapter 16: Viney8e_IRM_ch16

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Financial Institutions, Instruments and Markets
8th edition
Instructor's Resource Manual
Christopher Viney and Peter Phillips
Chapter 16
Foreign exchange: factors that influence the exchange rate
Learning objective 1: Explain how factors that affect the demand for a currency, or the supply of
a currency, affect the determination of an equilibrium exchange rate
• An exchange rate is the price of one currency in terms of another currency.
• Most developed economies operate a floating exchange-rate regime whereby the price of the
currency is determined by the demand for and the supply of that currency in the FX markets.
• Any change in the factors that impact upon the demand for and supply of a currency will result
in a change in the exchange rate.
• A country that maintains a linked exchange rate, crawling peg or managed float exchange rate
regime, whereby the local currency is tied to another currency such as the USD, or a basket of
other currencies, is effectively tied into supply and demand factors that affect the currency or the
basket of currencies to which it is linked or pegged.
Learning objective 2: Understand how the major factors that influence exchange rate movements
operate, particularly relative inflation rates, relative national income growth rates, relative
interest rates, exchange rate expectations, and central bank or government intervention
1. Relative inflation rates
• Of the theories advanced to explain the exchange rate, and changes in the equilibrium rate, the
purchasing power parity (PPP) theory is the longest standing.
• Under PPP, a country with a higher inflation rate relative to another country can expect its
currency to depreciate.
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• Perhaps the most critical shortcoming of PPP is that there are variables in addition to inflation
that affect the value of a currency.
• The Extended learning section considers PPP calculations that apply inflation differentials
between two countries to determining the expected change in the exchange rate.
2. Relative national income growth rates
• There is wide agreement that changes in the relative rates of growth in national incomes affect the
exchange rate.
• There is disagreement, however, as to the nature of the effect.
• An increase in the relative rate of growth is likely to result in an increased demand for imports,
which will result in a depreciation of the currency.
• On the other hand, an increase in the growth rate may also result in an increase in foreign
investment inflows, which will cause the currency to appreciate.
• Both mechanisms are likely to operate, with the balance between the two changing from time to
time.
3. Relative interest rates
• The interest rate differential between two countries is also important in determining the demand
for and supply of a currency in the FX market; however, the effects of a change in the interest
rate differential are ambiguous.
• It is important to determine whether the change is due to a change in inflationary expectations or
a change in the real rate of interest.
• If the increase in interest rates is a result of an increase in inflation expectations a currency should
depreciate. However, if the increase is due to a rise in the real rate of interest, then the currency
should appreciate.
4. Exchange rate expectations
• In addition to the economic fundamentals, exchange rate expectations are important in
determining the FX value of a currency.
• If the markets expect the exchange rate to depreciate, this will ultimately result in FX buy or sell
transactions that cause the depreciation; if an appreciation is expected, an appreciation typically
will be experienced.
• The modelling of expectations is a particularly difficult task. Theoretically, expectations should
be formed on the basis of the expected values of economic fundamentals. However, the FX
market often reacts to new information before the impact on the longer-term economic
fundamentals is fully analysed.
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• It may be possible to adopt a specific market indicator as a proxy for exchange rate expectations.
For example, in Australia, the commodity price index is often used as such a proxy.
5. Central bank or government intervention
• At times, the actions of governments or central banks are another variable that may be important
in the FX markets.
• The monetary policy setting of a central bank will impact upon the demand and supply factors
that affect an exchange rate. Also, a central bank or government may intervene in the FX
markets to influence directly the level of an exchange rate by intervening in international trade
flows, intervening in foreign investment flows or conducting FX transactions in the markets.
• For example, in an attempt to increase the FX value of its currency, a central bank may sell
foreign currency and buy the local currency; alternatively, to reduce the value of its currency, the
central bank may buy foreign currency. Alternatively, a government may implement policies that
change tariff, quota or embargo settings relating to goods and services.
Learning objective 3: Explore regression analysis as a statistical technique applied to variables
that impact on an exchange rate
• Regression analysis is a statistical technique that may be used to try to ascertain the relationship
between a dependent variable and changes in independent variables
• An exchange rate may be the dependent variable.
• Major independent exchange rate variables are relative inflation rates, relative national income
growth, relative interest rates, government or central bank intervention, and market expectations.
Essay questions
The following suggested answers incorporate the main points that should be recognised by a student.
An instructor should advise students of the depth of analysis and discussion that is required for a
particular question. For example, an undergraduate student may only be required to briefly introduce
points, explain in their own words and provide an example. On the other hand, a post-graduate
student may be required to provide much greater depth of analysis and discussion.
1. Use the theory of demand and supply to explain how equilibrium emerges with the FX
markets. Is this theory consistent with the volatility that FX markets are observed to exhibit?
(LO 16.1)
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