What is a market?
In everyday talk, a market is a place with shops. In economics, a market is any arrangement where buyers and sellers come into contact to exchange something, usually for money. Contact can be face to face, by phone or online.
Every deal is voluntary: both sides agree only if they think they gain. The buyer values the good more than the money; the seller values the money more than the good. The amount they agree on is the price.
Markets help a society answer big questions: what to make, how much, and for whom.
How price is set: demand and supply
Demand is how much buyers want and can pay for at each price. Supply is how much sellers offer at each price.
- If buyers want more than is offered (shortage), buyers compete and the price rises.
- If more is offered than buyers want (surplus), sellers compete and the price falls.
- Where the two match, the price stops moving. This is the equilibrium price.
Price is a signal. A rising price tells producers to make more and tells buyers to save; a falling price does the opposite. This is often called the price mechanism.
Types of market
- By place: local (village market), national, international or world market.
- By time: daily (fresh vegetables), weekly bazaars, seasonal fairs; also short period vs long period in economics.
- By size of deal: wholesale (bulk sales to traders) and retail (small sales to final users).
- By form of contact: physical markets and online (e-commerce) markets.
- By competition: perfect competition (many sellers, same product), monopolistic competition (many sellers, slightly different products), oligopoly (a few big firms) and monopoly (one seller).
Forms of market by what is traded
| Market | What is traded | Its price |
|---|---|---|
| Goods and services | Food, clothes, haircuts, phones | Price |
| Labour market | Work time and skills | Wage or salary |
| Money market | Short-term loans (up to about 1 year) | Interest rate |
| Capital market | Shares and long-term bonds | Share price, bond yield |
| Foreign exchange (forex) market | Currencies (rupee, euro, dollar, yen) | Exchange rate |
In the labour market workers supply labour and firms demand it. In the money market banks and firms lend and borrow for short periods; the central bank watches it closely. The capital market raises long-term money for factories and roads; a stock exchange is part of it. The forex market lets people pay across borders. The world market is all these markets linked between countries through exports, imports and investment.
Competition and the role of government
When many sellers compete, each tries to offer lower prices, better quality or new ideas. Buyers win. A monopoly has no rivals, often because of a barrier to entry such as a patent, a licence or control of a key resource, so it can charge more. Governments set competition rules, protect consumers and sometimes control prices of essential goods. Markets work well for many goods, but not always: pollution and public goods like street lights need public action.
Try it
For one day, list every market you take part in: buying snacks (goods), a parent's salary (labour), a bank deposit (money market), a family's mutual fund (capital), changing money on a trip (forex). Then use the sorter in the last 3D step. Predict-then-check: at a vegetable market, what happens to the price of mangoes at the end of the day when stock is left over?
Key formulas and definitions
- Market = buyers + sellers + something exchanged + a price
- Demand > supply → shortage → price rises
- Supply > demand → surplus → price falls
- Demand = supply → equilibrium price
- Labour → wage; money → interest rate; capital → share price/yield; forex → exchange rate
- Wholesale = bulk to traders; retail = small amounts to final users
Worked examples
1. Is an online shopping app a market? Explain.
Yes. Buyers and sellers come into contact through the app and exchange goods for money at an agreed price. A market does not need a physical place.
2. Name the market and its price: (a) a nurse is hired by a hospital, (b) a firm sells new shares, (c) a traveller swaps dollars for euros.
(a) Labour market, price = wage. (b) Capital market, price = share price. (c) Foreign exchange market, price = exchange rate.
3. At ₹40 per kg, buyers want 600 kg of onions but sellers offer 450 kg. What happens?
Demand (600) is more than supply (450), a shortage of 150 kg. Buyers compete, so the price rises until the amounts match.
4. At the end of the day a fruit seller still has 30 kg of bananas that will spoil. What should happen to the price, and why?
There is a surplus. The seller lowers the price to attract more buyers, because unsold bananas earn nothing.
5. A shop buys 100 notebooks at €0.80 each from a wholesaler and sells them at €1.20 each. Which markets are these, and what is the shop's gross margin?
Buying in bulk from the wholesaler is the wholesale market; selling to students is the retail market. Margin = (1.20 − 0.80) × 100 = €40.
6. 1 euro = 90 rupees. How many rupees does a tourist get for 150 euros, and in which market?
150 × 90 = ₹13 500, in the foreign exchange market.
Common mistakes
- Thinking a market must be a building or a street. Any contact between buyers and sellers counts.
- Mixing up the money market (short-term loans) and the capital market (shares and long-term loans).
- Calling a wage something other than a price. A wage is the price of labour.
- Thinking a shortage means prices fall. A shortage pushes prices up; a surplus pushes them down.