Every few years the market produces a stretch that shakes confidence. Prices fall sharply, headlines turn alarmist, and the conversation shifts from long-term planning to very short-term survival. If you did not prepare a plan while things were calm, you will be making your most expensive financial decisions at exactly the moment you have the least information and the most emotion.

The purpose of preparing is not to predict which direction markets go next. It is to remove the need to decide in the middle of a decline. Volatility is the unavoidable price of long-term equity returns, and markets that have the potential to deliver exceptional growth also have the potential to deliver brutal quarters. Preparation is what allows you to hold a sensible plan through both.

Know what the portfolio is for

Before anything else, each holding in a portfolio should be traceable to a goal, a time horizon and a funding source. Money needed for a house deposit in eighteen months does not belong in equities, regardless of how bullish the outlook is. Money for a retirement three decades away can tolerate significant turbulence, because it does not need to be sold in a down year. Getting this classification right is the single most protective step available, because it converts an emotional question — should I sell? — into a structural one — is this money even meant to be in this account?

This is also why we advise clients to hold a genuine cash reserve, sized to six to twelve months of essential outgoings, in an account that is not connected to a brokerage. Cash has a role that no other asset can do: it buys you the ability to not sell. A household that can absorb a layoff, a medical bill and a market decline at the same time is making financial decisions calmly, because it has no forced-seller problem.

Stress test before it happens

A plan that has never been tested under stress is a plan that will be tested by the market instead. We ask clients to run three scenarios on their portfolio before it is needed, and we do this because the answers usually change behaviour in advance.

  • A 30% equity drawdown over two quarters. Do you sell, or do you rebalance? Have you decided which, in writing?
  • A 20% drop in your income for twelve months. How many months of expenses does your reserve cover after the shock?
  • Both at the same time. This is the scenario that catches most households, and it is the one worth planning for honestly.

Run the numbers rather than guessing. Ask yourself what the portfolio would need to do in dollar terms to fund a year of expenses, an emergency repair and a market decline simultaneously. If the answer is uncomfortable, the fix is available now and expensive later. That is the entire argument for preparing in advance.

Rebalance with rules, not reactions

Rebalancing is the most reliable tool most people own and the one they use least, because the moment it feels necessary is the moment it feels wrong. Set the rule in advance: bands around your target allocation, for example rebalancing when equities drift more than five percentage points from target or once every twelve months, whichever comes first. Once the band is crossed, you sell the outperformer and buy the underperformer, which mechanically buys low and sells high without requiring a prediction.

Where possible, direct new contributions toward the underweight asset rather than selling anything. It is psychologically easier, usually more tax-efficient, and it produces the same result over time. Where you must sell, watch the tax impact: a large gain in a taxable account can make rebalancing cost more than the imbalance is worth, which is exactly the kind of judgement that is much easier to make with a plan and much harder to make in a panic.

The market will always offer you an opportunity to sell. The plan decides whether you are the kind of investor who takes it.

Use tax-loss harvesting as a shock absorber

During a decline, positions that are sitting on losses can be harvested to offset realised gains elsewhere, which reduces the tax cost of the rebalancing you are doing anyway. The effect is to turn a taxable loss into a real, compounding benefit — the market decline funds a lower tax bill and a return to your target allocation at the same time. This is one of the few genuinely symmetrical advantages in investing, because it only works when the market is down, which is precisely when most people stop paying attention.

It requires a little preparation. The harvesting list should exist before the decline, not during it, and the replacement positions should be selected in advance so that you are not making a fresh emotional decision in a falling market. We review harvestable losses monthly and flag positions where the timing, the wash-sale rules and the replacement make the trade worth making.

Plan the communication, not just the portfolio

Every client experiences volatility differently, and a portfolio that is technically fine can still be psychologically unsustainable if nobody has agreed in advance what will happen when the screens turn red. Before a turbulent period, write down your own rules: what will trigger a review, who you will call, what you are not permitted to do, and what evidence would actually change your mind. It sounds almost too simple, but a large share of damage during volatile periods comes from a decision made alone, in the evening, without a second opinion.

Our clients have a standing invitation to call us when the market is moving, and the purpose of that call is not to talk them into or out of anything. It is to run their own rules with them, confirm nothing has changed about their goals, and make sure the portfolio is still doing the job it was designed to do. That is a far more useful service than a prediction, and it is one we can provide on any ordinary Tuesday, not just in a crisis.

If you would like your portfolio stress tested properly — with real numbers, real cash flows and a plan written in advance — we will do it as part of a free review. Bring your current allocations and your spending plan, and we will model the scenarios together.