Execution · Decide
Decide Before the Pressure Hits
Most investors do not lose because they chose the wrong method. They lose because they make the hard decisions after the position is live and the blood is up.
The caricature and the point
A trade plan is often sold as a form: entry, target, stop. Tick the boxes and proceed. That misses the purpose. The plan is a pre-commitment device. You make the hard calls while you are calm, so that a stressed brain does not get to renegotiate them later.
Absence of a plan does not mean no plan. It means a plan assembled under duress, with incomplete information, at the worst moment.
What to write before you buy
Three things, minimum:
- Why you own it. The thesis in one or two sentences. What has to be true for this to work.
- What proves you wrong. A price, a fundamental fact, or a date. If it cannot be falsified, it is a belief, not a thesis.
- How much you can lose. Position size set by risk, not by how strongly you feel. A maximum dollar loss that forces a review.
Add a time stop if the method needs one. Add the primary exit. That is enough for most investors. A longer checklist is useful only if you will actually use it when the screen is red.
From the desk
The rule that stuck from watching a professional bank-bills trader was simple: know your risk before you take the trade. Not after. Not “I’ll figure it out if it goes wrong.” Before. Every time.
Why the timing matters
Under stress, the fast, emotional system dominates. Losses are processed like threats. The slower, analytical system — the one that can ask whether the original thesis is still intact — needs resources that stress depletes. A written plan is an artefact of the slow system that you can still read when the slow system is offline.
This is also why “I’ll cut it at X” resolves made at a desk so often fail. In a calm state you underestimate how fear, regret or the sight of other people making money will change the choice once the position is live.
Who needs this most
Active traders need it every session. Swing and position traders need it at entry and at a set review. Long-term investors need it as a one-page thesis: what would falsify this, how large is it, what event triggers a proper review rather than a panic. Passive investors need it as an Investment Policy Statement: allocation, rebalancing rules, drawdown tolerance, withdrawal approach. Without the document, bear markets write the plan for you.
What to do with this
Before the next purchase, fill in the three lines: why, what proves you wrong, how much you can lose. If you cannot fill them in, you are not ready to buy.