Expectations of future price are buyers' (and sellers') beliefs about where prices are headed, and in AP Macro they're a determinant of demand: expecting higher prices later shifts current demand right (buy now), while expecting lower prices shifts it left (wait it out).
Expectations of future price describe what consumers and producers think prices will do next, and those beliefs change behavior today. If you expect car prices to jump next month, you buy the car now. Multiply that across the whole market and current demand shifts to the right, even though nothing about today's price changed. If everyone expects a big sale next week, they hold off, and current demand shifts left.
In the CED, this lives in Topic 1.4 Demand as one of the determinants of demand (EK MKT-2.B.1). It's the E in the INSECT acronym (Income, Number of buyers, Substitutes/complements prices, Expectations, Consumer tastes, plus related goods). The crucial mechanic is that expectations shift the entire demand curve. They don't move you along it, because the current price hasn't changed. People are reacting to a price that doesn't exist yet.
This term supports learning objective AP Macro 1.4.C, explaining the determinants of demand, and it's the determinant students botch most often because it feels backwards. Higher expected prices cause more buying now, not less. That sounds like it violates the law of demand (1.4.A, EK MKT-2.A.1), but it doesn't, because the law of demand is about the current price and quantity demanded. Expectations are about a future price, so they shift the whole curve instead. Nailing this distinction is the foundation for every shift-versus-movement question in Unit 1, and the logic comes back hard later in the course when expected inflation starts shifting macro curves.
Keep studying AP Macroeconomics Unit 1
INSECT Acronym (Unit 1)
Expectations are the E in INSECT, the memory tool for the demand shifters. If an MCQ stem mentions what consumers think will happen to price, you're in shifter territory, not movement-along territory.
Demand Curve (Unit 1)
Expectations shift the whole demand curve. Expecting higher future prices shifts it right; expecting lower future prices shifts it left. The current price stays put on the axis, which is exactly why it's a shift and not a slide along the curve.
Market Equilibrium (Unit 1)
Once expectations shift demand, equilibrium adjusts. The classic chain is consumers expect higher car prices, demand rises now, and both current equilibrium price and quantity increase. Expectations can be self-fulfilling, since expecting higher prices actually pushes prices up today.
Expected Inflation and Aggregate Supply (Unit 3)
The same logic scales up to the whole economy. When workers and firms expect higher future prices, they demand higher wages and set higher prices now, shifting short-run aggregate supply. Master the micro version in Unit 1 and the macro version feels familiar.
This shows up almost exclusively as a multiple-choice shifter question, and the automobile example is the classic stem. You'll see something like 'consumers expect the price of automobiles to significantly increase next month' and be asked for the immediate effect on the current market. The answer pattern is always the same. Identify it as a determinant of demand, shift current demand right, and conclude that current equilibrium price and quantity both rise. The trap answers will describe a movement along the demand curve or a leftward shift (from the false intuition that higher prices mean less buying). No released FRQ has hinged on this term verbatim, but FRQ 1 routinely asks you to shift a supply-and-demand graph in response to a scenario, and an expectations scenario is fair game. Draw the shift, label the new equilibrium, done.
A change in quantity demanded is a movement along the demand curve caused by a change in the good's current price. Expectations of future price change demand at every current price, so they shift the entire curve. Quick test: did today's actual price change? If yes, movement along. If people are just reacting to a predicted price, it's a shift.
Expectations of future price are a determinant of demand (the E in INSECT), so they shift the entire demand curve rather than causing a movement along it.
If consumers expect prices to rise, current demand increases (shifts right) because people buy now to beat the price hike.
If consumers expect prices to fall, current demand decreases (shifts left) because people wait for the lower price.
This does not violate the law of demand, because the law of demand describes the relationship between the current price and quantity demanded, not predicted future prices.
Producers have expectations too. If sellers expect higher future prices, they may hold back goods now, which decreases current supply.
After the demand shift, trace the new market equilibrium: a rightward shift from expected price increases raises both current equilibrium price and quantity.
They're consumers' and producers' beliefs about where prices are headed, and they're a determinant of demand in Topic 1.4. Expecting higher prices later increases current demand; expecting lower prices later decreases it.
Up. This trips students up because it sounds backwards, but buyers rush to purchase before the price hike, so current demand shifts right and current equilibrium price and quantity both rise.
No. The law of demand (EK MKT-2.A.1) is the inverse relationship between the current price and quantity demanded along one curve. Expectations are about a future price, so they shift the whole curve instead of moving along it.
A change in quantity demanded happens only when the good's current price changes, moving you along the existing curve. Expectations shift the entire demand curve because buyers react to a price that hasn't happened yet.
Both. If sellers expect higher prices next month, they may withhold goods now, decreasing current supply, while buyers stock up, increasing current demand. Both forces push today's price up, which is why price expectations can be self-fulfilling.