Diversification explained: what it protects against, and what it doesn't
Sutra & Signal Research · Published · Last reviewed · 5 min read
The short answer
Diversification means spreading money across investments that do not all move together, so that one failure cannot sink the portfolio. It reduces company-specific risk, but it cannot remove market-wide risk, and correlations tend to rise in a crisis.
Three layers
- Within an asset class: many companies rather than a few.
- Across sectors: banks, technology, consumer and industrials respond to different forces.
- Across asset classes: equities, bonds, gold and cash behave differently through cycles.
Concentration limits
Disciplined portfolios set explicit caps, for example on any single holding or sector, and check them regularly. Our demo dashboard shows how such checks can be displayed.
The limits of diversification
In severe sell-offs many assets fall together. Diversification smooths the journey; it does not guarantee against loss. Owning twenty versions of the same idea is not diversification.