Risk-Tolerance Drift

A simple explanation

A year ago, a particular level of risk would have made you uncomfortable. Today, the same level barely registers, and a noticeably larger one feels like the new edge. Nothing about your underlying margin of safety has changed. What has changed is that you have run the smaller risk often enough that it no longer feels like risk.

This is risk-tolerance drift. The body habituates. The Reward System, reading habituation as evidence of capability, expands the acceptable zone. The new edge becomes the floor, and the next expansion is judged against the floor rather than against the original baseline. Across months and years, the drift can carry you to a position your year-ago self would have recognised as plainly unsafe — and your present self does not see it.

An everyday example

Three years ago you opened a small trading account, deliberately sized so that a total loss would be uncomfortable but not life-affecting. You did well. You scaled up. You did better. You scaled up again. The wins came regularly enough that the position size stopped feeling large; it felt normal. Last month you took a position that, if it goes wrong, will hurt the rest of your year. You did not feel reckless when you took it. You felt confident. The confidence was real — it was just not earned by anything other than the streak.

This pattern repeats outside investing in almost every domain — driving speeds, work hours, dietary boundaries, training intensities, alcohol thresholds, social-media exposure. Wherever a person can choose a level of risk and run that level repeatedly without negative feedback, the level tends to drift upward.

Why does habituation feel like competence?

Because both produce the same internal signal — this no longer registers as dangerous. The body cannot distinguish between I have grown more skilful and I have run this risk often enough that it no longer triggers alarm. The Reward System, asked which interpretation to adopt, prefers the one that allows the more rewarding behaviour. Competence wins the framing contest by default.

Diane Vaughan's work on the Challenger disaster, and her concept of the normalisation of deviance, describes the organisational version of this. Each successful flight at a marginally lower temperature threshold made the threshold itself feel safer. The deviation became the new norm. The fatal flight was not a sudden break with prior practice; it was the predictable endpoint of a slow drift no one in the organisation experienced as drift.

The behavioral loop

The loop runs on positive feedback, which is what makes it dangerous:

1. Baseline established — a risk level is chosen, deliberately, with some thought.
2. First pass — the risk is run. No negative feedback arrives (most of the time, by design — the risk was sized for survivability).
3. Habituation — the body's alarm response to the risk level dampens. The level no longer registers as risky.
4. Reward signal — the System logs the absence of negative feedback as evidence of competence.
5. Slight expansion — a marginally larger risk is taken. It feels manageable because the baseline has shifted.
6. Cycle repeats — across many iterations, the acceptable zone widens. The original baseline is no longer felt at all.
7. Tail event — eventually, a low-probability outcome materialises at the new risk level. The full size of the loss is felt for the first time.
8. Residue arrives — the residue from years of drift arrives at the moment of the tail event, often along with the recognition that the drift was visible to others.

Emotional drivers

Three drivers, often present together:

• A genuine, often well-founded enjoyment of the activity that the risk is attached to — the trading, the driving, the late-night work. The pleasure is real.
• A history of streaks that produced confidence the System could not distinguish from earned skill.
• A subtle status motive — the larger position, the harder workout, the longer hours — that makes the larger risk legible as evidence of capability to oneself and others.

What your nervous system does

The body's alarm response to risk runs on prediction error. When a risk is novel, the prediction is uncertain and the sympathetic surge arrives. When the same risk has been run repeatedly without negative outcome, the prediction tightens — the body now expects no consequence — and the surge dampens. This is the literal somatic shape of habituation. The risk has not gotten safer; the alarm has just learned to stay quiet.

The result is a real perceptual change. The risk that once felt large does not feel large. The body is reporting accurately on its own state. It is just reporting on its state, not on the underlying probability distribution.

The DojoWell interpretation

Risk-tolerance drift is a substitution where the substitute is habituation-as-competence. The Reward System's original ask was to expand capability — to take on what could be handled, to grow into harder problems. The substitute it supplied was the felt sense of expanded capability, achieved by familiarity rather than by underlying margin improvement. The substitute and the original share a surface property — both feel like growing competence — and they diverge sharply on the underlying margin of safety.

The deposit is low because no real margin has improved. The streak is masking what the tail event will eventually reveal. The residue, when it arrives, arrives at full size — years of accumulated drift land in a single moment. The signature is false progress: each pass at the expanded risk logs as a clean win, while the underlying exposure compounds.

The work is not to reject risk. Some risk is structurally necessary to a life that grows. The work is to maintain the distinction between habituation and competence — to know, at the level of process rather than feeling, which one is currently running.

This is one of the patterns where the felt sense is least reliable as a diagnostic. The body is reporting accurately on its own habituation; it cannot tell you whether the underlying exposure has actually improved. Decision hygiene practices — premortems, decision journals, periodic baseline resets — are the structural answer because they operate at a level the felt sense cannot.

How do I know if I've drifted?

A workable diagnostic:

1. Describe the current risk to a careful friend. Watch their face. The expression you see is information your habituated body is no longer producing.
2. Compare current behaviour to year-ago behaviour. If a year-ago you would have rejected the current level outright, the drift is the substance of the gap. The question is not which version is right; the question is what produced the change.
3. Run a premortem at the current level. Imagine the tail event has happened. If the imagined consequence is materially worse than the original baseline would have allowed, the drift has carried you somewhere the deliberate self would not have gone.

Practical steps

1. Schedule periodic baseline resets. Quarterly or semi-annual reviews of position size, hours, exposure, intensity. The point is to interrupt the drift with deliberation.
2. Record your original baseline in writing. A note that describes the risk level you chose deliberately, when you were not habituated. The artifact survives the drift.
3. Use external structure to cap the drift. Position-size limits, hard caps on hours, automatic risk controls. The structure protects you from the body that no longer feels the drift.
4. Watch for streaks as a drift accelerator. Wins produce confidence the System misreads as competence. After a streak, the impulse to expand is at its highest and the underlying margin has not actually changed.
5. Listen to outside observers. People who are not habituated to your current level can see the drift you cannot. Their concern is information, not interference.

Reflection questions

• Where in your life has a risk level drifted upward without a corresponding improvement in margin?
• What would your year-ago self say about your current baseline?
• Which of your streaks is most likely to be teaching the wrong lesson about your underlying capability?
• Where is decision hygiene needed because the felt sense is no longer reliable?

Frequently Asked Questions