How to re-evaluate your portfolio during a market sell-off

Key takeaways:

• A market sell-off does not automatically mean an investment strategy should change, but it can be a useful prompt to review long-term goals, time horizon and risk profile.
• Rebalancing may be appropriate if sharp market moves have shifted a portfolio away from its intended allocation, although costs, taxes and objectives should be considered.
• Diversification should go beyond simply “spreading out”; holdings may be less diversified than they appear if they are exposed to similar risks or correlations.
• Sell-offs may create areas worth reviewing, but lower prices can reflect emotion, changing fundamentals or new risks, and identifying value can remain uncertain.
• Volatility management often starts with pausing before acting, carefully reviewing cash allocations, and avoiding decisions based solely on short-term market moves.

Market downturns can stir anxiety, but they may also be a useful moment to review your investment approach. When equity markets fall, it’s not automatically a signal to exit or change strategy. A sell-off can be a time to review your portfolio’s structure, consider your emotional response, and check whether your investments still align with your long-term objectives.

This guide outlines practical investment principles that may help you review your portfolio and avoid reactive decisions during periods of volatility.

Note: Investments can fall as well as rise, and you may get back less than you invest.

1. Pause and focus on long-term goals

Market volatility is part and parcel of investing. It can be tempting to respond emotionally when your portfolio loses value — but decisions driven by fear may undermine long-term planning.

Useful points to keep in mind:

• Understand that losses tend to feel more painful than gains feel rewarding — a core concept in behavioural finance.
• Reconnect with your original investment purpose, whether that’s retirement, wealth building, or long-term income.
• Remember that trying to time the market is difficult and can increase the risk of poor entry or exit decisions.

Before making any changes, it can be useful to revisit your financial goals, time horizon and risk profile.

2. Review whether rebalancing is appropriate

During sharp market moves, portfolios can drift away from their original allocations. Some sectors or asset classes may become overweight, while others may fall below their target allocation. Rebalancing could help you restore alignment with your intended risk profile, but whether it is appropriate depends on your objectives, costs, and tax considerations.

Review points may include:

• Whether exposure to overrepresented sectors has become too high
• Whether underweighted areas, such as different regions or asset classes, still fit your long-term plan
• Whether some assets appear attractively valued after the sell-off, while recognising that valuation is uncertain

If you’ve built up cash reserves, a pullback may be a time to assess whether gradual investment remains aligned with your plan, risk tolerance and objectives.

3. Review diversification beyond simply “spreading out”

Diversification is a widely recognised investment principle, but it has limits and does not eliminate the risk of loss. It works best when a portfolio is spread across holdings that are not all exposed to the same risks or likely to move in the same direction at the same time.

Broad diversification:

• Holding more shares may reduce company-specific risk, but the benefit depends on how correlated the holdings are.
• Choosing equities from different industries may help smooth performance, although losses can still occur.
• For broad exposure, some investors use global index funds or ETFs, including those tracking global equity indices; costs and risks vary by product.

Correlation matters:

Simply owning multiple shares or funds isn’t enough if they’re all exposed to the same risks. For instance, a portfolio of several tech or banking stocks may still move in lockstep during a downturn.

Diversified portfolios often include exposure to:

• A balance of growth and defensive sectors
• Cyclical and non-cyclical businesses
• A mix of domestic and international holdings

Be mindful of home bias:

Many investors instinctively favour domestic equities — but this can increase exposure to country-specific risks. A globally diversified portfolio may give access to varied economic cycles and broaden potential sources of return, but it can also introduce currency, political and market risks.

Think in terms of time horizon:

Investors with longer time horizons may be able to tolerate more equity exposure, which has historically provided higher long-term returns, but this depends on individual circumstances and past performance is not a reliable guide to future returns. As investors approach retirement, some consider increasing allocations to bonds or other lower-volatility assets to help manage volatility, although these assets can still fall in value.

4. Review potential opportunities and risks during sell-offs

Market downturns may reflect a mix of investor emotion, changing fundamentals and wider economic conditions. During periods of heavy selling, some well-managed companies may become undervalued, but valuation is uncertain and losses can continue.

Review points may include:

• Analysing sectors where prices have fallen sharply and assessing what caused the decline
• Comparing valuation metrics, such as price-to-earnings ratios, with historical averages and sector peers
• Analysing companies with strong balance sheets, recurring income, or pricing power

Sell-offs may create pricing dislocations, but identifying value is uncertain and requires careful analysis.

5. Principles for managing volatility

Across market cycles, these principles may help you review decisions more carefully when prices fall:

• Pause before acting. Emotional decisions during sell-offs may not align with long-term goals.
• Revisit diversification. Check whether your holdings remain spread across sectors, regions and asset types in line with your objectives.
• Review rebalancing. Consider whether asset allocation has drifted significantly from the intended mix.
• Review cash allocations carefully. Downturns may be a time to assess opportunities selectively, not reactively.
• Consider time in the market. Recognise the risks of trying to “get out and get back in.”
• Reflect rather than react. Use volatility as a time for review, not fear-driven change.

These principles do not change with the headlines — they are commonly used in long-term investment planning.

Conclusion: Use a sell-off as a prompt to review

A market correction does not automatically mean a strategy should change. It can, however, be a useful prompt for reviewing whether your portfolio’s structure, risk exposure, diversification, and time horizon still align with your financial goals.

Staying grounded, reviewing diversification and assessing both opportunities and risks may help you make more considered decisions during periods of high volatility. This does not prevent losses or guarantee better outcomes, but it can reduce the risk of making reactive changes based only on short-term market moves.