Economics and Market Environment
Domain 4 - Economics and Market Environment
This domain tests microeconomics, macroeconomics, international trade, and exchange-rate behavior. Questions often ask how a policy or price change affects quantities, revenues, inflation, or currency values, so you need the transmission mechanism rather than a definition.
Core rules
- Elasticity: Demand is elastic when the absolute price elasticity exceeds 1. A price cut raises total revenue only when demand is elastic; a price increase raises revenue only when demand is inelastic.
- Market structures: Perfect competition, monopolistic competition, oligopoly, and monopoly differ in pricing power, entry barriers, and long-run economic profit.
- Macro policy: Monetary policy affects short-term rates, credit, and exchange rates; fiscal policy affects aggregate demand directly. Recognize lags and crowding-out.
- Exchange rates: A rise in the domestic interest rate tends to attract capital and appreciate the currency, all else equal. Covered interest parity links spot rates, forward rates, and interest differentials.
- Trade: Tariffs and quotas raise domestic prices, reduce consumer surplus, and may protect producer surplus; the net welfare effect is usually negative.
Worked example
Spot USD/EUR is 1.20, the one-year USD interest rate is 4%, and the one-year euro rate is 2%. Covered interest parity implies a forward rate of 1.20 × (1.04 / 1.02) = 1.2235 USD/EUR. If the actual forward is 1.20, the forward USD price of euros is too low. An arbitrageur can borrow euros, convert to dollars at spot, invest dollars at 4%, and buy euros forward at 1.20. Borrow 1 euro: owe 1.02 euros. Convert to 1.20 dollars, invest to get 1.248 dollars, and convert forward to 1.04 euros. Repay 1.02 euros and keep 0.02 euros before costs. The quoted forward was inconsistent with parity.
Traps that cost marks
- Assuming a currency appreciation always helps domestic exporters.
- Confusing nominal and real interest rates.
- Treating CPI as a perfect cost-of-living measure.
- Forgetting that elasticity determines the revenue effect of a price change.
- Mixing direct and indirect exchange-rate quotations.