In short
- Diversification spreads money across things that don't all rise and fall at the same time.
- Owning many things that behave alike isn't real diversification.
- It reduces the damage from any one bad outcome. It doesn't remove risk or guarantee a gain.
The idea
If all your savings are in one company's shares and that company runs into trouble, your whole plan suffers. If your money is spread across many businesses, one bad outcome hurts far less. That is diversification: making sure no single thing can sink you.
Different ways to spread money
- Across companies: many businesses rather than a handful.
- Across industries: banks, technology, consumer goods, healthcare and so on, because a whole industry can have a bad few years.
- Across types of asset: equity, debt, gold and cash each behave differently (flip through equity, debt and gold).
- Across time: investing in instalments rather than all on one day (see SIP or lump sum).
When it looks diversified but isn't
Owning five mutual funds can feel diversified. But if all five hold mostly the same large companies, you own the same thing five times, with five sets of costs. Ten shares from the same industry can all fall together when that industry hits a rough patch.
The test isn't how many things you own. It is whether they are likely to fall at the same time, for the same reason. Look at what is inside: funds publish a regular list of what they hold.
Try it: spread your eggs
You have 12 eggs. Choose how many baskets to spread them across, then see what happens when one basket drops.
All 12 eggs are in one basket.
When one thing goes wrong, spreading out limits the damage. On a bad day for everything, every basket can lose some eggs: spreading softens the blow, it doesn't stop it.
What it can't do
When markets fall sharply, many things fall together for a while. Diversification softens the blow; it doesn't stop it.
It also means you will always own something doing worse than the best performer. That is the point, not a flaw (see why chasing last year's winner often disappoints).
Questions to ask yourself
- If my biggest holding halved, how much of my total would I lose?
- Do my funds hold mostly the same companies?
- Is my money spread across more than one type of asset?
- Do I have cash set aside for the near term?
Educational content only. Not investment advice. Examples marked [hypothetical] are made up for teaching and do not show real or expected returns.