Sequence risk and why the first decade matters most

The order in which investment returns arrive does not matter while you are accumulating. Once you are withdrawing, it matters enormously.

The mechanism

During accumulation, a poor year followed by a good year produces the same result as the reverse, assuming the same contributions. Order is irrelevant to the final balance.

During withdrawal, it is not. A decline early in retirement, combined with withdrawals, permanently reduces the capital base.

Selling assets at depressed prices to fund living costs means fewer shares remain to participate in any subsequent recovery.

The same decline occurring in year twenty-five does far less damage, because most of the withdrawals have already been funded from a larger base.

This asymmetry is why identical average returns can produce a portfolio that lasts forty years or one that fails in eighteen.

Why it is worse than it sounds

Poor markets frequently coincide with poor economic conditions, which is precisely when other options narrow.

Part-time work is harder to find. Property is harder to sell at a reasonable price. Other assets may be depressed simultaneously.

So the flexibility that could compensate is least available at the moment it is most needed.

What reduces it

Spending flexibility. The single most effective mitigation.

Modelling consistently shows that reducing withdrawals modestly during poor years substantially improves outcomes — more than most changes to asset allocation.

The practical version is structural: build the plan so that a portion of spending is genuinely discretionary and can be reduced without hardship.

A cash reserve. Holding one to three years of spending in cash or short-term instruments so that withdrawals during a decline need not come from equities.

The theoretical case is debated, since cash earns less over time. The practical case is that it makes not selling easier, and behaviour is the binding constraint for most people.

Guaranteed income covering essentials. Social Security, a pension, or an annuity covering the non-negotiable portion of spending means the portfolio funds only discretionary costs.

A portfolio that can be cut in half without threatening basic living costs is a different risk proposition from one funding everything.

Working slightly longer. Even part-time income in the first years of retirement reduces withdrawals during the period of highest sensitivity.

A rising equity glide path. Research has examined starting retirement with a lower equity allocation and increasing it over time, which reduces exposure during the vulnerable early years.

This is counterintuitive and has reasonable support in the modelling literature, and it is not widely implemented.

What does not reduce it

Worth being clear about.

Avoiding equities entirely. Very conservative portfolios fail more often over thirty years, not less, because they cannot outpace inflation.

The risk being managed is not volatility for its own sake but the probability of running out of money, and inflation is the larger threat over long horizons.

Trying to time the market. Requires being right twice and has a poor record among professionals.

Chasing yield. Shifting into higher-yielding assets to avoid selling capital generally means taking on credit risk, which correlates with equity risk at exactly the wrong moments.

The first ten years

The practical implication.

The decade around retirement is the period of maximum vulnerability — the portfolio is at its largest, the withdrawal period is longest, and there is the least time to recover.

Which argues for more conservatism in that window than either before or after it, and for a deliberate plan about what happens if markets fall substantially in the first few years.

Having decided in advance what you would cut, and by how much, is considerably better than improvising during a decline.

Monitoring it

A simple check performed annually.

Divide current annual withdrawals by the current portfolio value. If that rate has drifted substantially above where it started, the plan is under pressure and an adjustment is worth considering.

Doing this early, in small increments, is much less painful than doing it late in large ones.

General information only, not financial advice. Past performance does not predict future results — consult a qualified adviser about your own situation.