Saving vs investing
Saving means keeping money aside, usually in a bank. It is safe and easy to take out. Investing means buying something that can earn money or grow in value.
Why invest? Because prices rise every year. This is inflation. If prices rise 5% a year and your money grows only 3%, you can buy less next year. Investing tries to beat inflation.
First save an emergency fund (3–6 months of expenses). Invest only money you will not need soon.
Basic investment products
Shares (stocks)
A share is a tiny piece of ownership in a company. You may earn a dividend (part of profit) and a capital gain if the price rises. Prices can also fall.
Bonds
A bond is a loan to a government or company. You get fixed interest (the coupon) and your money back on the maturity date. Government bonds are usually safer than company bonds.
Funds
A mutual fund or index fund collects money from many people and buys many shares or bonds. A small amount buys a part of a big basket. An index fund simply copies a market index, so its fees are low.
Other assets
Fixed deposits, gold, property and pension plans are also assets. Each has its own mix of safety, return and how quickly you can turn it into cash (liquidity).
Risk and return
Return is what you earn. Risk is the chance that you get less than you hoped, or even lose money.
Rule: higher possible return comes with higher risk. A bank deposit is low risk and low return. Shares are high risk but have grown the most over long periods.
Your risk appetite depends on your goal, how long you can wait and how calm you stay when prices fall. A student saving for a phone next year should take little risk. Someone saving for 20 years can take more.
Reducing risk: diversification and time
Diversification means spreading money across many investments. One company may fail, but a whole basket rarely does.
Time also helps. Returns grow on top of earlier returns (compounding). Short-term falls tend to even out over many years.
To choose a fund, check: what it holds, its fees (expense ratio), its risk level and its long-term record. Beware anyone who promises high returns with no risk: that is a warning sign of fraud.
Try it: in the 3D, set shares to 0%, then 100%, for 20 years. Write down both results and both bad-year drops.
Key formulas and definitions
- Value after n years = P × (1 + r)ⁿ
- Real return ≈ nominal return − inflation
- Return % = (gain ÷ amount invested) × 100
- Rule of 72: years to double ≈ 72 ÷ rate %
Worked examples
1. You invest 10,000 at 8% a year for 2 years, compounded yearly. What is it worth?
10,000 × 1.08 × 1.08 = 11,664.
2. Your deposit earns 6% a year and inflation is 5%. What is the real return?
Real return ≈ 6% − 5% = 1%. Your buying power grows by only about 1% a year.
3. Ravi buys a share for 200 and sells it for 230 after receiving a dividend of 10. What is his total return %?
Gain = 30 + 10 = 40. Return = 40 ÷ 200 × 100 = 20%.
4. Using the rule of 72, how long does money take to double at 9% a year?
72 ÷ 9 = 8 years (about).
Common mistakes
- Thinking saving and investing are the same: saving protects money; investing aims to grow it and carries risk.
- Putting all money into one company's shares: one bad result can wipe out a big part.
- Selling in panic when prices fall for a short time, then missing the recovery.
- Ignoring inflation and fees: a 6% return with 5% inflation and 1% fees gives almost nothing real.