The Missing Discipline - why investment performance needs its own science

For the past few decades, the most ambitious investment firms have quietly borrowed performance tools from outside of the industry. 

The playbook came from elite sport, from chess, from military training - arenas that had already worked out how to help talented people to perform under pressure. It made sense. Those fields were decades ahead in thinking seriously about the mind of the performer, and importing their methods was a genuine advance. A generation of portfolio managers learned to talk about routine, focus, recovery and resilience in language first written for athletes and operators.

But borrowed tools have a ceiling. And I think we have reached it. 

The problem is not that sport and the military got performance wrong. It is that a portfolio manager’s world is different in ways that matter - different enough that a discipline built for someone else will always fit imperfectly, no matter how well it is adapted. These are the differences I keep returning to. 

There is no off-season, no final whistle, no end of tour. Performance in almost every other arena is episodic and bounded. The athlete has a season, then a break. The soldier has a tour, then it ends. There is a whistle, a final buzzer, a moment when the pressure formally stops and the body and mind are allowed to reset. Markets offer none of this. Longer term investment horizons require PMs to hold through weakness and drawdown. On any time frame, risk exposure does not pause overnight or over the weekend. There is no natural break. The psychological models built around recovery between bounded efforts simply do not adequately serve a job that never fully switches off. 

Markets are in the age of information overload.  The sheer volume of information now flowing through markets, the constant blend of signal and noise, means that market action is getting harder to read. What worked before isn’t necessarily cutting it now and the total cognitive load is becoming something few other performers ever have to sift their way through. The investor is not just performing under pressure. They are performing while trying to work out, in real time, whether the feedback they are receiving means anything at all and if they do indeed have the tools to create investment strategies that can work. 

Metacognition that makes a difference requires the ability to see thinking in flow. Behavioural finance research has made great strides in bringing real human psychology to classical economic theory. But many studies to date have a key limitation which is that they show human heuristics (mental shortcuts) and biases in static scenarios that do not reflect real world contexts and often using study participants who are not professional investors themselves. When we look at investor trading and profitability, we need to be aware of the massive range of variables that can impact mental alertness, emotional stability, and cognitive and attentional capacity. Susceptibility to biases and the reliance on heuristics change continually depending on shifts in mood and alertness. The psychological capital available to an investor at any one time varies considerably. Dynamic contexts require dynamic self-management and the ability to choose which performance or self-regulation strategy is most appropriate and when. 

A portfolio manager’s emotional weather is global.  You cannot coach the investor at the desk and ignore everything else, because the state that shapes an investment decision is a whole-person state. Sleep, relationships, health, the market’s mood and the manager’s own - all of it feeds into the judgement made at the moment of decision. Sustainable performance work therefore requires an integrated, holistic view of how a PM’s total cognitive and emotional context affects the way they invest. Treating the mind at the desk as a closed system, separate from life around it, is precisely the kind of simplification that borrowed frameworks encourage and that markets punish. 

None of these are edge cases. They are the defining conditions of the job. And once you see them clearly, the conclusion is hard to avoid: investment performance should not be a set of methods adapted from another field. It should be its own discipline, built around how professional investors actually think, decide and endure. 

I have come to think of this as investment performance science: the study, and the practice, of the psychological and behavioural factors that separate the investors who endure and compound over a career from the merely talented. No one outperforms all the time; markets are where you must accept that you will not. The discipline is not just in creating winning trades, but how you carry stretches when your work is not being rewarded, so that your good decisions can compound over a long career. What is required is much more nuanced than ‘motivation’ or ‘mindset’. The exploration is in what allows a capable investor to keep making good decisions, under real exposure, across the runs of noise and drawdown that other performers never have to tolerate - and what quietly erodes that capacity in ways that don’t show up in traditional stats and measures until it is too late. 

I did not arrive at this from the outside. The first decade of my career was in the markets in New York, London and Asia Pacific, so I understand the world my clients live in. The second half of my working life has been in human development, coaching senior investment professionals on exactly these questions. I am now completing a Masters at Cambridge, where my research focuses specifically on performance psychology in investment professionals. That research is, in a sense, the founding piece of the discipline I am describing here. 

My newsletter, Finding Edge, is where I will build the argument in the open. Some editions will make the case for the discipline itself. Others will work through the practical questions it raises: how to make decisions well in different contexts, how to regulate emotion most effectively, how to review performance honestly beyond the scoreboard of traditional investment measures, and how teams and firms can develop the psychological capacity of their investors with intention. It will always be thematic and evidence-based, and it will never be about any individual, any fund, or any position. 

The premise is simple. Much investment performance is coached with borrowed tools. It deserves its own discipline, built from research on how professional investors actually think, decide and endure through unique conditions and challenges. 

That is the missing discipline. I want to help build it.

If this resonates and you’d like to follow along, subscribe to Finding Edge.

Or, if you’re curious about working together, you can get in touch here.