Bucket Strategy: Money Split by When
A bucket strategy divides retirement savings by when the money will be spent: near-term needs in cash and short bonds, medium-term in income assets, long-term in equities. The point is that a market fall never forces a sale from the long bucket.
How it works
Savings are divided by time horizon rather than by category. Not “how much in shares” but “what will I spend in the next two years, the next ten, and after that” — and each answer gets its own pot.
The near bucket holds spending money. Cash and short-dated bonds, sized to cover a stated number of years of expenses, chosen because the value has to be there on a date rather than because it will grow.
The middle bucket bridges. Income-producing and mixed holdings that can tolerate some fluctuation because they will not be spent for several years, and which refill the near bucket over time.
The far bucket is where growth lives. Equities, held for a horizon long enough that the fluctuation is irrelevant — and the whole structure exists to make that sentence true rather than aspirational.
Why it works, and what it actually is
Selling into a decline to fund spending is the failure it prevents. A retiree drawing income from a falling portfolio locks in losses at the worst possible moment. The near bucket removes the necessity.
The refill rule is where the method is usually left vague. Topping up annually regardless is simple and sometimes sells into weakness. Topping up only after good years is better and requires a definition of “good” written down in advance. Whichever you choose, choosing it beforehand is the part that matters.
Arithmetically it is an allocation with names on the compartments. A 20/30/50 split across three buckets is a 20/30/50 portfolio. The honest description is that this is a behavioural device, and that is not a criticism — a plan you can hold through a bad decade beats a better plan you abandon.
In practice
The safety has a price, and it is worth naming. Cash held for years earns less than the long bucket would have, and that shortfall is the premium paid for never being forced to sell.
Nothing here reads a chart. No volume, no indicator, no timing — the decisions are about horizon and spending.
The design horizon is decades. Which is also why the fee on whatever holds the far bucket compounds so heavily against the result.
A severe fall is the scenario it was built for, not a failure of it. The near bucket funds spending while the far one recovers, which is the whole mechanism working as intended.
No stop appears anywhere. The control is how much is withdrawn and from which pot, which is a spending decision rather than a market one.
Refilling is trading, and trading costs. A round trip on this site’s shared history is 2% of a median bar’s range, plus any tax on the disposal — which argues for refilling infrequently.
Writing the rules before you need them
Three numbers make this a plan rather than a description. How many years of spending sit in the near bucket. What condition triggers a refill. And what you will do if the far bucket has fallen and the near one is nearly empty at the same time.
That third question is the one nobody writes down, and it is the situation the whole structure exists to handle. The honest answers are to spend less for a period, to draw from the middle bucket, or to accept selling some of the long one — and deciding which, in advance, is the difference between a system and a hope. A rule written during a fall is not a rule.
What a bucket strategy is not
It is not a different portfolio. It is the same mix, labelled.
It is not protection from loss. The far bucket still falls.
It is not automatic. The refill rule is yours to set.
And it is not free. Holding cash costs return.
When it fails
In a long flat period the insurance is paid and never claimed. The cash earns little, the far bucket goes nowhere, and the structure costs return without the crash it was protecting against ever arriving.
The second failure is a near bucket sized too small. Two years of spending does not cover a decline that takes four to recover.
A third is having no refill rule. The decision then gets made under pressure, badly.
A fourth is treating the buckets as unconnected. They are one portfolio and the total allocation is what determines the outcome.
A fifth is ignoring inflation in the near bucket. Cash held for years loses purchasing power steadily.
And a sixth is rebalancing between buckets too often. Each move costs, and the point was to leave the far one alone.
The original data
On this site’s shared 576-bar history, 95% of bars sit below a prior peak, the deepest drawdown is
3.76%, and the longest stretch below a peak runs 73 bars. The ulcer index — the root mean square of
the drawdown series — is 1.67%, a ratio of 0.44 to the maximum. The figures are in
research/series-measurements.json, produced by site/measure_series.py.
That 95% figure is the argument for the whole approach, stated as a measurement. Being below a recent high is not an emergency; it is the ordinary condition of holding anything, occupying almost every bar. A structure that requires you to sell only when above a peak would almost never let you sell.
And the ulcer index at 0.44 of the maximum says where the difficulty actually lies. The pain came from persistence rather than depth — a shallow decline that will not end, which is precisely what exhausts a near bucket. The answer to that final question is to spend from the middle bucket and cut withdrawals before selling the far one — and that ordering should already be written down, because deciding it now is deciding it at the worst moment.
Related
Retirement accounts is where most of this money actually sits and what the tax treatment does. Portfolio building is the same set of decisions expressed as an allocation. And drawdown is the measurement the near bucket exists to survive.
What I like about this is that it is a psychological device dressed as an allocation, and it does not pretend otherwise once you look at it. The arithmetic is no different from holding the same mix and rebalancing. The difference is that when markets fall, you can point at a pot of cash with a date on it and know you are not forced to sell anything, and that turns out to matter more than the arithmetic does.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.