A Lump Sum Has Arrived — Invest It or Stage It?

The question, stated properly

Maya has a significant amount in one go and has to decide what to do with it. That is a genuine decision, and it is not the decision most articles on this topic are answering.

Somebody paid monthly, investing from each salary, is not choosing between a lump sum and instalments. They have no lump sum. Their monthly investing is simply the shape of their income — what a SIP is and is not.

Maya's question is different: she has the money today, and she is deciding whether to put it in now or spread it over some months. Everything below is about that, and it applies to an inheritance, a bonus, proceeds from a sale, or a maturing deposit.

The argument for investing it now

The money is either invested or it is not. Whatever you expect the investment to return, holding back means some of the money is not earning that return during the months it waits.

If you think the investment is worth making, holding half of it out for six months is a decision to be half-invested for six months — and if you would not choose to be half-invested as a permanent policy, it is worth asking why six months of it is right.

There is a related point that people find uncomfortable. Staging the money is a mild bet that prices will be lower later. That may be true and there is no way to know it, and a rule for deploying money according to what the market has done is a timing rule, which is a thing we have tested directly and which failed — why market timing is unreliable.

The argument for staging it

The counter-argument is not about expected returns and should not pretend to be.

It is that investing everything the day before a large fall is a specific, identifiable regret, and that regret can produce an action — selling — that converts a fall into a permanent loss. Staging reduces the chance of that particular experience, and it does so by giving up some expected return.

That is a legitimate trade. It is buying a lower chance of the worst-feeling outcome, at a cost. What it is not is a way of improving the expected result, and staging presented as though it improved the odds is presenting a comfort as a strategy.

The strength of this argument depends entirely on one thing: whether you would actually sell. If Maya would sit through a fall regardless, staging buys her very little. If she would not, it may be buying the whole plan.

What our own evidence bears on, and what it does not

Two things on this site are relevant, and it is worth being exact about their scope.

We tested a saver holding money back for a fall against investing steadily, across every fifteen-year period in the Indian record, with tax charged. Holding back for a fall did no better than investing steadily — and, crucially, the arm that kept a permanent cash reserve did substantially worse than either. The gap between timing well and timing badly was a rounding error; the gap between investing and not investing was large. That is does buying the dip help, and it bears on this question because staging is a temporary version of the same thing: money out of the market for a period.

We have also measured the range of outcomes from investing steadily over every period — a SIP does not remove market risk.

What we have not done is run this experiment. A direct test of investing a lump immediately against spreading it over a defined number of months, over every start date, with tax charged, has not been built here, and this page therefore states no figure for how often one beat the other. The machinery exists and the test is a reasonable one to run; until it is run, we will not quote a result for it. Figures for this comparison circulate widely and we have verified none of them.

Deciding

A workable way through, in order.

Take out what is not for investing. Anything needed within the next few years should not go into shares at all, whatever you decide about the rest. That decision comes first and removes much of the difficulty, because it shrinks the amount the question applies to.

Then ask what you would do in a fall. Honestly, and preferably by reference to what you have actually done before rather than what you expect of yourself — discovering your risk capacity in a drawdown.

If you would hold on, invest it. The waiting has a cost and the protection it buys is one you do not need.

If you are not sure, stage it over a short and fixed period, decided in advance, and follow the schedule regardless of what the market does. The schedule being fixed is the entire point: staging that adjusts to market conditions has become market timing, and the fixed version is the one whose cost you can at least bound.

Do not stage for years. The longer the period, the more it costs and the less it protects, since the money is out of the market for longer and the remaining unstaged amount is exposed anyway.

What to take away

Most people never face this question. If you do, the two options differ less in what they are likely to produce than in which mistake they protect against.

Investing now is the better expected outcome and exposes you to a regret that could make you sell. Staging costs something and buys a lower chance of that regret. Choose on which of those you can actually live with — and if you stage, write down the schedule first and then stop deciding.