Asset allocation
What is Asset allocation?
Asset allocation is the way a portfolio is divided among broad investment groups such as equities, fixed income, cash, real estate, commodities, and alternatives.
Why asset allocation matters
Asset allocation determines the main sources of a portfolio's expected return, volatility, liquidity, and potential losses. Security selection matters, but the mix of growth assets, defensive assets, and cash usually has a larger effect on how a portfolio behaves across market environments. A suitable allocation connects investment risk to a real objective rather than treating the portfolio as a collection of unrelated holdings.
How it works
An investor first defines objectives, time horizon, liquidity needs, loss tolerance, tax considerations, and any investment restrictions. Expected returns, risks, and correlations can then inform target weights. The result may be a simple equity and bond mix or a multi-asset allocation with detailed limits by region, currency, sector, duration, and liquidity.
Example
A long-horizon investor might hold 70% global equities, 25% high-quality bonds, and 5% cash. The equities provide most of the growth potential, the bonds can moderate losses and provide income, and cash supports near-term spending. A shorter horizon or lower capacity for loss could justify a larger defensive allocation.
How to interpret it
Allocation should be assessed both at the top level and through look-through exposure. A portfolio holding several funds may appear diversified by line item while remaining concentrated in the same companies, currencies, or factors. Compare actual weights with targets, identify the source of deviations, and decide whether each deviation is intentional.
Limitations and common mistakes
Expected returns and correlations are estimates, not promises, and can change during stressed markets. A mathematically efficient allocation may still be unsuitable if it ignores liquidity, taxes, implementation costs, or investor behavior. Another common mistake is choosing weights from recent performance and repeatedly shifting toward whichever asset class has just performed best.
Questions to ask
Ask what objective each allocation serves, which risks dominate after looking through funds, how much can be lost in a severe scenario, and when cash will be needed. Check whether currency exposure is intentional and whether rebalancing is feasible after costs and taxes. Finally, compare the proposed mix with a simpler alternative. Additional complexity should have a clear purpose, measurable benefit, and named owner responsible for monitoring it.
Also known as: portfolio allocation
Sources and further reading
- Asset Allocation and Diversification, Investor.gov, U.S. Securities and Exchange Commission