Diversification
Spreading capital across assets that behave differently, so weakness in one is offset by others. It reduces avoidable risk but does not remove market-wide risk.
Diversification combines assets whose returns are not perfectly correlated, so their ups and downs partly cancel out and the overall ride is smoother than any single holding. When assets play genuinely different roles (growth, defence, inflation protection), the portfolio becomes more robust across environments.
Diversification reduces avoidable, asset-specific risk; it does not remove market-wide risk, and in a crisis correlations can converge. Its protection is real but not absolute. That is why a rules-based approach also reads the environment rather than relying on a fixed mix alone.
Related terms
- Market regimeA persistent market environment (trending, calm, or turbulent) that a rules-based reading identifies from price behaviour, rather than a prediction of what comes next.
- Tactical Asset Allocation (TAA)Adjusting a portfolio's mix of broad asset classes over time in response to the market environment, instead of holding fixed weights regardless of conditions.
Read it in context
- GoldGold has no issuer, no contract and no internal cash flow: nothing about it pays you for holding it. Its return comes entirely from the change in its price, which makes it a different kind of asset from a share or a bond rather than a defective version of either.
- What an ETF isAn ETF is a fund whose shares trade on an exchange like a single company's. You own shares in the fund and the fund owns the assets, so one purchase gives you exposure to everything inside it. The wrapper is straightforward; what decides your risk is the rule that fills it and what it costs to hold.
- What a world equity ETF actually holds"World" on a fund is not a description of the planet. It names an index, and the major world indices cover very different universes. Some exclude emerging markets entirely, and most weight by market value, which concentrates them wherever prices have risen most.
- Real versus apparent diversificationCounting your funds answers one question about diversification and is silent on another. It tells you something about how exposed you are to any single company failing; it tells you nothing about what your holdings have in common. That is what decides whether they fall together.