Draw the graph · Micro · Supply and demand
Sellers expect higher prices
Drag a curve sideways, or use its arrows. A curve you do not move is a curve you are saying stays put. Make each shift clear enough that a reader could see it.
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Demand stays put. Supply shifts left.
Sellers' expectations are a supply-side factor. If farmers expect higher prices later, they hold grain back now, offering less at every current price. Today's supply curve shifts left. Demand today is unchanged. The higher price moves buyers up along their demand curve.
Price rises and quantity falls.
Common mistake. Students often shift supply right because 'farmers want to sell at high prices.' They do, but the high prices are in the future. Today they sell less, so today's supply shifts left.
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Lesson: The Supply Curve