Money and prices
Money is anything people accept to pay for goods and services. It lets us trade without barter. A price is how much money a thing costs. Prices change with how many people want a thing (demand) and how much is available (supply).
Inflation is a general rise in prices over time. If prices rise 5% a year, 100 coins buy less next year. So money loses some purchasing power.
Consumption: needs, wants and budgeting
Consumption means using goods and services. Needs are things we must have, like food, clothes, home and health care. Wants are things that make life nicer, like games and treats.
A budget is a plan that splits income into needs, wants and saving. A simple idea is to cover needs first, then save, then spend on wants. Try it: list your pocket money and split it three ways.
Financial markets: saving, banks, shares and bonds
A financial market is a place where savers and people who need money meet. In a bank, savers earn interest and the bank lends to others. A share makes you a small part-owner of a company; you may get a part of profit, but its price can fall. A bond is a loan to a company or government that pays interest.
Risk and return go together: higher possible gain usually means a higher chance of loss. Spread money across different things to reduce risk. Compare real return = return minus inflation.
Enterprises and jobs
An enterprise (business) makes goods or services to sell. It needs money to start and grow: from its owners, from banks, or from share and bond buyers. With that money it buys machines, rents space and hires workers. Workers earn wages and spend them, which gives income to other businesses. This loop is how saving, investing and jobs link together. Employment can be as an employee or by running your own enterprise.
Key formulas and definitions
- Income = Needs + Wants + Saving
- New price = old price × (1 + inflation rate)
- Real return ≈ return rate − inflation rate
- Simple interest = principal × rate × time
- Risk and return rise together
Worked examples
1. A student has 500 coins a month. 60% goes to needs and 20% to saving. How much is for wants?
Needs 60% + saving 20% = 80%. Wants = 20% of 500 = 100 coins.
2. A notebook costs 40 coins. Inflation is 10% for one year. What is the price next year?
40 × 1.10 = 44 coins.
3. You invest 1000 coins at 8% a year while inflation is 5%. What is the approximate real return?
8% − 5% = about 3% a year. Your money grows 8% but buys about 3% more.
Common mistakes
- Thinking saving and investing are the same. Saving is safe storage; investing puts money to work and carries risk.
- Treating wants as needs when making a budget.
- Forgetting inflation when counting returns.
- Putting all money in one risky thing.