Portfolio Diversification Calculator 2026

The 110-minus-age rule is a simplified asset allocation guideline. You subtract your age from 110, and the result represents the suggested percentage of stocks in your portfolio. The remainder goes to bonds and cash. For example, a 35-year-old should hold about 75% in stocks. The rule reflects the idea that younger investors have more time to recover from market downturns.

In the calculator, an aggressive profile increases the stock allocation by 10 percentage points above the base value derived from the 110-minus-age rule. A conservative profile reduces it by 20 percentage points. A moderate profile applies no adjustment. These corrections allow you to tailor the portfolio to your personal risk tolerance regardless of age.

The portion of the portfolio not allocated to stocks is divided between bonds and cash in a 2:1 ratio. Bonds receive two-thirds of this portion and cash receives one-third. This split provides portfolio stability while maintaining a minimum level of liquidity.

The portfolio diversification calculator computes allocation structure, not real rates of return. It does not directly account for inflation. When planning a portfolio, bear in mind that cash loses real value during inflationary periods, which is why long-term investors typically prefer higher allocations to stocks and inflation-linked bonds.

The calculator suggests roughly one-third of the "safe" portion of your portfolio in cash or cash equivalents (e.g. term deposits, money market funds). This is separate from an emergency fund, which should be held outside the investment portfolio. Cash in a portfolio acts as a buffer for capitalising on market opportunities.

The rule is a simplified starting point and does not account for individual financial goals, income, liabilities or existing retirement savings. It provides a useful benchmark, especially for beginner investors. For larger portfolios, it is worth consulting a licensed investment adviser for a personalised strategy.

Stocks represent ownership stakes in companies — they offer higher potential returns but come with greater price volatility. Bonds are debt instruments — they provide lower but more predictable returns. Bonds act as a portfolio stabiliser, reducing overall volatility during stock market downturns.

Rebalancing means restoring your target asset allocation when actual proportions drift by, say, 5 percentage points from the plan. Most experts recommend rebalancing once or twice a year or after significant market moves. Rebalancing too frequently generates unnecessary transaction costs and potential tax liabilities.

Diversification means spreading capital across different asset classes, sectors and geographic regions to reduce risk. When one part of the portfolio falls in value, another may rise, smoothing out overall volatility. This calculator covers basic diversification across stocks, bonds and cash.

No. The portfolio diversification calculator results are for informational and educational purposes only. They are based on simplified statistical rules and do not take into account your individual financial situation, investment goals or risk tolerance. Consult a licensed investment adviser before making any investment decisions.