Market Equilibrium
Equilibrium is where supply meets demand.
About this topic
The equilibrium is where the supply and demand curves cross: the equilibrium price at which the quantity demanded equals the quantity supplied. At this price, every buyer who wants to buy at that price finds a seller, and there is no pressure for change.
If the price is above equilibrium, there is a surplus, because sellers offer more than buyers want, and sellers cut prices to clear stock. If the price is below equilibrium, there is a shortage, because buyers want more than is available, and prices are bid up. So the market tends to move toward equilibrium without anyone in charge, which Adam Smith called the invisible hand.
Example: suppose at 5 dollars consumers want 300 pizzas but producers offer 500, a surplus of 200. Restaurants discount, demand rises as supply falls back, and prices settle at, say, 4 dollars where both are 400. Concert tickets priced too low sell out instantly and resell at higher prices, showing a shortage at work.
Misconceptions: equilibrium is not necessarily fair or desirable, only a balance of buyers and sellers. It is also not fixed; whenever conditions change, the curves shift and a new equilibrium forms. Tip: when asked about price, first identify the equilibrium, then check for surplus or shortage.
Key ideas
- Equilibrium price clears the market
- Shortage below it, surplus above it
- Markets adjust
Quick check
Use cases: where Market Equilibrium helps
- Homework: review the key idea behind Market Equilibrium before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Market Equilibrium without notes.
- Visual learning: play with the interactive lab to see how Market Equilibrium changes when you adjust its inputs.
- Teaching a friend: explain Market Equilibrium in your own words, then compare your version with the key ideas.
Economics explains prices, jobs, budgets and government policy in daily life.
Frequently asked questions
What is Market Equilibrium?
Equilibrium is where supply meets demand.
What will I learn in Market Equilibrium?
Equilibrium price clears the market. Shortage below it, surplus above it. Markets adjust.
Is Market Equilibrium part of Economics & Money?
Yes. It is one of 30 Economics & Money topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Market Equilibrium lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Market Equilibrium?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.