The Three-Check Routine Professionals Run Before Every Trade

In 2024, the S&P 500 returned about 25%. The average equity investor did not.

That much is not controversial. How much worse the average investor did is one of the more contested numbers in personal finance, and it is worth two minutes of your time before we build anything on top of it.

How big is the behaviour gap?

Percentage points a year, given up to timing

DALBAR, for the year 2024 8.48

The number most often quoted. The same study put 2025 at 0.72.

DALBAR, for the year 2025 0.72

Same method, same publisher, one year later.

Morningstar, ten years to Dec 2024 1.2

Investors earned 7.0% where the funds returned 8.2%. Stable across periods.

The top two bars come from the same study, one year apart. A measurement that moves that far in twelve months is not measuring a stable human trait — it is measuring the market that happened.

And even the conservative figure is contested. In 2026 the Financial Analysts Journal published a paper by Fulkerson, Jordan, Riley and Yan whose title states its case plainly: bad timing does not cost investors 15% of their funds' returns. I have not been able to read the full paper, so I am not putting a rival number on this chart.

So in September 2026 I rebuilt the number myself, from 341,049 public SEC filings, with the data and code published alongside. Across 7,073 US funds the base-case gap for 2020 to 2025 is 0.36 points a year — and it moves between −0.06 and +0.62 depending on one share-class assumption that the famous figures never state. The full working paper is at /research/behaviour-gap.

What survives all of it is the direction in most measurements, and the size in none of them. Investors tend to do somewhat worse than the funds they own, by an amount that depends heavily on how you measure it. That is enough to act on, and the honest version is more useful than the frightening one.

The figure you will see quoted is DALBAR’s: an equity-investor return of 16.54% against the index’s 25.02% in 2024, a gap of 848 basis points. Then the same study, on the same method, put 2025 at 72 basis points. A measurement that moves by a factor of twelve in a single year is telling you about the market that happened rather than about a durable human failing. It also cannot be recomputed, because the method is not published. So I rebuilt the number from public SEC filings, with the data and code alongside: across 7,073 US funds the base case for 2020 to 2025 is 0.36 points a year, and it swings between −0.06 and +0.62 on one share-class assumption the famous figures never state. The working paper is here.

The careful version is Morningstar’s Mind the Gap: over the ten years to December 2024 the average dollar in US funds earned 7.0% a year against the funds’ own 8.2%, a gap of 1.2 percentage points that stays roughly constant across ten-year windows. And even that is now being argued with in print, by a 2026 Financial Analysts Journal paper I have not been able to read in full.

So the honest opening for this article is not a shocking number. It is this: investors reliably capture less than the funds they own, by an amount somewhere around a percentage point a year, and the cause is timing rather than fees or a bad market. That is smaller than the headlines and more than enough to be worth fixing.

The cause was never a lack of information. Every number the professionals had was freely available to everyone. On a trading floor, intelligence is surprisingly cheap. Discipline is what actually costs money. After nearly two decades in the financial industry, I can tell you the difference between retail and institutional results is rarely IQ. It is a system: a physical, written system that removes the one decision emotion always ruins, which is when to act.

Here is that system. It is boring. That is the point.

Professionals don’t trade opinions. They trade rules.

Retail investors are addicted to the home run, the story of doubling their money in a stock. Institutions are built around a different instinct: not losing. Their entire mandate rests on risk management first.

The clearest example is cash. By the third quarter of 2025, Berkshire Hathaway held a record $381.7 billion in cash and Treasury bills, a figure that climbed to $397.4 billion by early 2026. Warren Buffett was not hiding under the bed. His rules simply did not see enough worth buying at the prices on offer.

Institutions do not treat cash as a safety net. They treat it as strategic ammunition, deployed only when the maths screams buy.

The pre-commitment

Before we build it, one honest question: what exact number triggers your decision to sell?

Not a feeling. A number. If you cannot answer, you are flying blind, and the rest of this article is about fixing exactly that.

The pre-trade routine

Three gates, passed in order

1

Volatility status

Is the fear gauge above its own recent average?

If the VIX has spiked above its 10-day average, then I open no new long position.

Prevents: Buying into a stampede of institutions that are selling because a limit told them to.

2

The strategic reserve

Is my tactical cash still intact, and still separate?

If this purchase would touch the emergency fund, then it is not a purchase I can make.

Prevents: Becoming a forced seller yourself at the bottom, which is the same trap one gate up.

3

The exit, written first

Do I know what would make me sell this?

If I cannot state the exit in one sentence before buying, then I do not buy.

Prevents: Thesis creep — the slow replacement of the reason, one excuse at a time.

Not one of the three requires a forecast. Each is a cue you can check in under a minute and a response you decided on a quiet afternoon.

That is the whole difference between a routine and an opinion. An opinion has to be right. A routine only has to be followed, and it is at its most valuable on precisely the days when you would least like to follow it.

Notice the form each rule takes. If this, then that. That is not a stylistic choice; it is the thing psychologists call an implementation intention, and it is the mechanism by which every institutional document in this series actually works. A goal says what you want. An if-then plan says what happens, and it says it in advance, so the version of you looking at a red screen is executing rather than deciding.

This is the same problem the Value at Risk formula solves for institutions: it replaces judgement-under-stress with a rule defined in calm. The difference is that theirs is imposed by a regulator and yours has to be imposed by you, which is harder, and is the only genuinely difficult part of this article.

Check 1 — Volatility status

The VIX measures the price of fear in US markets. It matters to you for one reason: institutions run on risk budgets, and when volatility spikes, risk becomes expensive. Their own models then force them to sell, not because Apple got worse, but because their risk budget blew out.

So a spiking fear gauge tells you the selling around you may be mechanical rather than informed. A simple, workable rule: track the VIX against its own recent average, say its 10-day moving average. When it spikes above that, halt new long entries. That usually signals institutional stress and forced selling, and you do not want to be buying into a stampede of forced sellers.

For European equities, use the V2TX, the EURO STOXX 50 Volatility Index, as your regional fear gauge.

One limitation worth stating, because a rule you trust blindly is worse than no rule. This check is good at telling you not to buy today. It is useless at telling you when to buy, and it will keep you out of some perfectly good entries. It is a brake, not a steering wheel, and anyone who sells it to you as a timing signal is overselling it.

(Why forced selling happens mechanically, and how it once crashed the whole market, is its own story.)

Check 2 — The strategic cash reserve

This is where most private investors fail completely.

Many regulated funds actively manage liquidity and define target cash buffers in their mandates, often in the mid-single digits. For you, that reserve is strategic ammunition: it stops you from being a forced seller at the bottom.

The non-negotiable discipline is separation. Your emergency fund and your tactical cash are two different buckets:

Do not mix your broken-car bucket with your broken-market bucket.

(The full three-bucket architecture — emergency fund, liquidity layer, growth engine — is here.)

And yes, cash costs you something. Reframe it as an insurance premium. You pay car insurance every year hoping never to crash, and you do not call it wasted. The premium even varies by currency: in 2025, short-term US Treasury bills yielded enough to beat US inflation, so your ammunition paid you to hold it, while in the euro area high-quality government bills often left you roughly flat to slightly negative in real terms. Cheaper insurance in dollars, more expensive in euros, but insurance either way.

Check 3 — The operationalised exit plan

Every position needs kill criteria, defined before you buy, while you are calm.

Workable, hard triggers used on institutional desks:

1. Thesis breach — the company cuts its own profit forecast by more than about 5%. When management says “we will earn less than we promised,” that is a signal, not a dip to buy.
2. Trend break — the price breaks a long-term trend, for example the 200-day moving average, on heavy volume.
3. Cash-flow collapse — free cash flow falls for two consecutive quarters.

The exact triggers matter less than the principle. If you have not written your exit before you enter, you are trading on hope. (The fuller framework for exit decisions is here — and why a naive stop-loss is a target, not a shield.)

Build it today — three steps

1. Separate your buckets. Emergency fund ≠ tactical cash. Never mix them.
2. Choose a simple liquidity instrument. For most people a high-quality money-market fund or short-dated government bills is plenty. You do not need anything exotic.
3. Write your Investment Policy Statement. One page: your volatility threshold, your cash target, your hard exit metrics. Not in your head. On paper.

The whole idea

You cannot control the market. You can control your mandate.

The professional who calmly buys at the bottom is rarely smarter than the amateur who panicked. He simply operated under rules that forbade emotion, written down long before the stress arrived. The three checks exist to move every decision out of the fearful present and into a calm, pre-committed plan.

The market rewards patience, but only if patience has a plan. Build your mandate. Follow the math.

Educational content only — not investment advice, and not a personal recommendation. Thresholds, yields and the exit triggers above are illustrative and change over time. Speak to a qualified, licensed professional before acting.