I spent 25 years watching some of the sharpest people in finance make decisions they had absolutely no business making.
These were experienced professionals with genuinely sound frameworks and track records worth respecting.
When a session turned against them and the pressure got real, all of it evaporated. The framework, the rules, the process they had spent weeks building, gone.
And the person sitting in that chair looked nothing like the person who built it.
I was that person more than once.
Here is what I know after watching this happen across desks, funds, and coaching engagements for most of my career.
Knowledge was never the problem. The process was never the problem.
What failed every single time was the conditioning of the human responsible for executing it under genuine pressure.
Almost nobody in professional finance is addressing that seriously. And the cost shows up in every post-mortem that blames the trade instead of the person making it.
What actually breaks
Here is what I watched happen so many times it stopped surprising me.
A position moves against a trader. The stop is close but has not triggered yet. They give it twenty more minutes.
Forty minutes later, they are averaging into a position their own framework explicitly prohibits. And they know it while it is happening.
The post-mortem the next morning looks at the entry, the sizing, and the market conditions.
It almost never asks why a trained professional with a well-tested process made a decision they would have called obviously wrong in any calm review session.
That question gets avoided because the answer is uncomfortable.
When genuine pressure activates the stress response, the part of your brain responsible for rational decision-making loses its authority.
The limbic system takes over.
Its entire purpose is to stop the pain, create certainty, and produce action. Your drawdown parameters are completely irrelevant to it.
What I watched happen to those traders was a predictable neurological event. It happens when a nervous system has never been specifically conditioned for the pressure environment it is operating in every single day.
| “Wall Street spends billions on market data, yet almost nothing on the oneedge that actually separates fund titans from the rest: the biology ofdecision-making.”Evan Marks on the Making Billions Podcast with Ryan MillerListen to the full conversation here |
Sophistication does not protect you
Man Group’s Q1 2026 Strategy Outlook noted that Trend Following strategies, among the most systematically rigorous approaches in institutional finance, took significant losses during last year’s Liberation Day market gyrations.
In the acute phase of the volatility, human beings deviated from the process in ways that cost real money, even as the underlying models were sound and eventually vindicated by the recovery that followed.
Long-Term Capital Management ran Nobel laureates on genuinely sophisticated risk models. The positions they held were eventually proven right by the market. The firm dissolved in 1998 because the people running those models could not maintain the psychological distance required to trust their own framework under existential pressure.
A better model does not change what is happening in the nervous system of the person executing it.
What a risk mindset actually requires
Most people assume this is about learning to stay calm. That framing misses the point.
A risk mindset is the trained capacity to execute your framework regardless of your emotional state on any given day. It requires that your nervous system has been conditioned well enough that the behavioral pattern holds even when every internal signal is arguing against it.
On The Modern Manager podcast, I made the point that under pressure, people do not rise to the occasion. They fall to the level of their training. If all your preparation has been on the technical side of risk management, you have built half a system. The half responsible for actual execution when the session turns against you has been left completely untrained.
Listen to that conversation on The Modern Manager podcast: Episode 396 here.
| The M1 methodology is built to close that gap through pressure inoculation, nervous system conditioning, and decision repetitions under stress that rewire the behavioral response at a neurological level. Explore the full methodology here. |
One thing more
Spend two minutes on one honest question.
If a position moves against me today, what is the first specific thing I am likely to do that contradicts my own framework?
Write it down somewhere you will actually see it before the first trade.
Naming your most likely failure pattern before the session starts creates enough cognitive distance to interrupt it when it arrives. Most traders skip this because it requires admitting in writing exactly where they are most likely to break.
That discomfort is precisely why it works.
The risk model in your spreadsheet is probably doing its job.
After 25 years of watching this pattern repeat at every level of the industry, the variable that keeps failing is rarely the framework. Getting the human side of execution to match the quality of the technical side is where the real performance work is.
If this is a gap you have been trying to close without much progress, we are putting something together specifically for traders and investment professionals who want to do this work in a structured, high-accountability environment. If you want to understand where your execution is specifically breaking down before anything else,
Start with a conversation with Evan.
