100 minus age rule: Asset allocation is considered one of the most important strategies for building long-term wealth and managing risk in volatile markets. Financial experts say investors should not only diversify across equity, debt, gold, and other asset classes, but also align investments with age, financial goals, and risk appetite.

Speaking on Zee Business around portfolio allocation strategies, experts explained the popular “100-minus-age” rule and how investors can use it to decide their equity exposure.

According to Poonam Rungta, certified financial planner, the rule suggests that investors should subtract their age from 100 to determine the percentage of equity allocation in their portfolio.

• A 30-year-old investor can allocate nearly 70 per cent to equity
• A 60-year-old investor may limit equity exposure to around 40 per cent

Experts said the logic behind the strategy is that younger investors have a longer investment horizon and can better handle market volatility, while older investors nearing retirement should reduce risk and preserve capital through higher allocation to debt and stable assets.

They added that age-based allocation mainly helps investors decide the balance between equity and debt, though many investors today also diversify into gold, silver, REITs, and global funds as part of their broader portfolio strategy.

However, experts cautioned that the formula should not be treated as a one-size-fits-all rule. Risk appetite, income stability, investment goals, and existing assets must also be considered before deciding portfolio allocation.

Pankaj Mathpal, Managing Director, Optima Money, said strategic asset allocation is among the most common and disciplined approaches investors should follow. Under this method, investors decide in advance how much money will remain invested in equity, debt, gold, or silver based on long-term goals and risk tolerance.

He explained that an investor may decide to keep 60 per cent in equity, 30 per cent in debt, and 10 per cent in gold or silver. If equity markets rally and the allocation rises to 70 per cent, the portfolio should be rebalanced to restore the original allocation.

Experts noted that regular rebalancing helps control risk and prevents emotional investing driven by greed or market rallies.

The financial experts also highlighted tactical asset allocation, where investors temporarily increase exposure to sectors or asset classes expected to outperform. Experts warned that this strategy is aggressive in nature and requires active monitoring and correct market timing.

They noted that investors often shift towards themes such as defence, manufacturing, PSU, or gold funds when those sectors witness strong momentum. However, poor timing can lead to losses instead of higher returns.

For investors who do not want to actively manage portfolios, experts suggested dynamic asset allocation or balanced advantage funds. These funds automatically adjust equity and debt exposure depending on market conditions.

Experts also recommended the core-and-satellite strategy for disciplined investing. Under this approach, around 70 to 80 per cent of the portfolio remains in stable, long-term investments, while 20-30 per cent can be allocated to aggressive or thematic opportunities such as small-cap, business cycle, or sectoral funds.

They added that the core portfolio should remain relatively stable, while the satellite portion can be used for tactical opportunities and higher-risk bets.

While explaining goal-based allocation, experts said investors should align portfolios with the time horizon of their financial goals.

For short-term goals of one to two years, they advised avoiding equity exposure and preferring liquid or short-duration debt funds. For medium-term goals, dynamic asset allocation or multi-asset funds may be suitable, while long-term goals can have greater exposure to diversified equity funds.

Experts emphasised that discipline and diversification remain the foundation of successful investing, regardless of the allocation strategy chosen.