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Investing

Why Process Matters More Than Outcome

Learning in a probabilistic world

Author

Steven McCormick • 2025-05-27 • 3 min read

Markets provide constant feedback, but that feedback is often misleading.

Prices move every day. Positions show gains and losses. It is tempting to treat outcomes as verdicts on decision quality. A good result feels like confirmation. A bad one feels like error.

In investing, that instinct leads to systematic mistakes.

Outcomes Are Noisy Signals

Investment decisions are made under uncertainty. Even the best analysis produces a range of possible outcomes, not a single result.

A sound decision can lose money. A careless one can make it. Over short periods, luck dominates skill. Over longer periods, the distinction becomes clearer, but never disappears entirely.

Judging decisions solely by outcome confuses randomness with ability. It rewards favourable noise and punishes disciplined reasoning.

This is why markets can teach the wrong lessons to those who rely on outcomes alone.

The Difference Between Decision Quality and Result

Process refers to how a decision was made. What information was considered. What assumptions were tested. What risks were acknowledged. What alternatives were rejected.

Outcome refers to what happened after the fact.

The two are related, but not tightly coupled.

A decision based on realistic assumptions, conservative expectations, and appropriate sizing can still produce a loss. That loss does not invalidate the process. It reflects the probabilistic nature of markets.

Likewise, a profitable outcome does not guarantee that the reasoning behind it was sound. It may simply mean that circumstances aligned temporarily.

Learning requires separating the two.

Why Markets Reward Bad Habits

Markets are particularly good at reinforcing poor processes.

Leverage can magnify early success. Momentum can reward trend-following regardless of underlying value. A favourable cycle can make weak businesses appear strong.

When these outcomes are interpreted as proof of skill, bad habits harden. Risk-taking increases. Standards loosen. Eventually, the environment changes and the accumulated fragility is exposed.

By then, the feedback arrives too late.

This pattern explains why many investors perform well for a time and then give it back. The issue is not intelligence. It is the way outcomes were interpreted.

Process as a Constraint

A well-defined process acts as a constraint on behaviour.

It limits position sizes. It enforces discipline around assumptions. It prevents decisions from being driven solely by recent price action or emotion.

These constraints are often uncomfortable. They can cause an investor to miss opportunities that work out or to hold positions that underperform temporarily.

But over time, they reduce the likelihood of catastrophic error.

Process does not maximise upside in any single period. It increases the probability of survival across many periods.

The Role of Probabilities

Thinking in terms of probabilities clarifies the distinction between process and outcome.

A decision should be judged by whether it increased expected value, not by whether it paid off immediately. This requires accepting that some good decisions will fail and some bad ones will succeed.

The goal is not to eliminate losses. It is to ensure that losses occur for acceptable reasons and within acceptable bounds.

This perspective shifts the focus from being right to being resilient.

Why This Is Hard

Process-focused thinking runs against human instincts.

People prefer certainty to distributions. They prefer narratives to ranges. They prefer feedback that feels immediate and personal.

Markets exploit these preferences. They reward confidence, punish patience, and obscure causality.

Maintaining a sound process requires resisting those pressures, especially when outcomes appear to contradict it.

What This Implies

Outcome matters. Capital must compound. Losses must be managed. But outcome alone is an unreliable teacher.

A repeatable process provides a way to learn from experience without being misled by it. It allows decisions to be evaluated on their reasoning rather than their luck.

In a probabilistic world, process is the only part of the investment equation an investor truly controls. Everything else is noise.

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