Diversification is spreading your money across investments that do not all move the same way at the same time. The aim is not a higher return but a less erratic path, so that one setback does not decide your result on its own.
Count is not spread
Twenty positions sounds diversified. If all twenty sit in US technology, they largely move together and you effectively hold one position in twenty pieces. What counts is not how many names you hold but how many independent risks.
Spread is therefore always a question about a dimension. Spread across what, exactly?
- Sector and industry: do your holdings follow the same economic cycle?
- Region and country: does your result hang on one economy or one currency?
- Currency: are you carrying exchange-rate risk you had not noticed?
- Asset class: shares, bonds, property, crypto
- Broker and custody: a different kind of risk, but a real one
- Market cap: large established companies move differently from small ones
A portfolio can be beautifully spread on one dimension and fully concentrated on another. Both are true at once.
Spread dilutes on its own
You do not have to trade for your spread to shift. A position that rises faster than the rest grows its own weight, which is how portfolios quietly concentrate in whatever has done best.
What goes wrong
- Overlapping funds. Three global ETFs feels like spread, but if they hold largely the same large companies, you own those companies three times.
- Investments are not net worth. A home, a pension and a business stake can leave you heavily concentrated overall despite a neatly spread securities portfolio.
- Spread is not protection. In a broad correction many things fall together. Diversification dampens the path, it does not remove loss.
In practice
The diversification donut on the Overview tab of the investments dashboard is the fastest way to see the shape of your portfolio. Pick a dimension and it redraws: sector, industry, market cap, continent, country, currency, exchange, security type, broker, or strategy based on your own tags.
Click a slice and it becomes a filter. Click slices across dimensions and they combine, so "European technology holdings" is two clicks rather than a spreadsheet.
The Analysis section separately shows concentration across your whole net worth rather than within investments, which is usually the more important question.
Gylder does not prescribe a target split or flag a position as overweight. What counts as sensible spread depends on your horizon and the rest of your situation.
Related terms
- Portfolio: how weight makes concentration visible
- Asset allocation: the split across asset classes
- Volatility: how spread dampens movement
Want to see how spread you actually are, across all your accounts? Read Tracking your investment portfolio without a spreadsheet.