Your written trading plan
The course doesn't end with knowledge, it ends with a document: your own plan, recording what you do, what you stay away from, and what you hold onto during bad stretches.
Learning objective: After this lesson, you can write your own trading plan with goals, rules, and a crisis scenario.
Everything you've read across the five stages doesn't help much as long as it stays in your head. In your head, it changes the moment prices fall. On paper, it doesn't.
Your plan needs seven points. First, your goal, with an amount and a year. Second, your split between safe and risky. Third, your monthly savings rate. Fourth, your rebalancing rules.
Fifth, what you explicitly don't do. Sixth, your sentence for the crisis moment, read when everything's falling. And seventh, the date you review the plan, usually once a year.
The sixth point is the most important. Write now, while calm, what your future self should read during panic. That's the one thing that actually works in that moment, because your future self won't listen to you, but it will read what you wrote.
A written plan works as a commitment device. Its value doesn't come from the rules being optimal, it comes from moving the decision into a state with no emotional strain. Since the documented return gap between funds and their investors comes largely from deviations made under strain, the quantitative effect is comparable to a cost optimization.
Useful components include goals with a time reference, the strategic allocation with allowed bands, rules for contributions and rebalancing, an explicit exclusion list, stop criteria for active strategies, and a set review date. The exclusion list deserves special attention, since decisions to abstain are easier made in advance than in the moment.
For review, a distinction is needed between adjusting the plan and reacting to it. Adjustments are appropriate for changes in life circumstances, time horizon, or capacity. An adjustment triggered by recent market performance, by contrast, is exactly the procyclical reaction the plan is meant to prevent. Writing this distinction down in advance raises the odds it actually gets made when it matters.
Summary
- What stays in your head changes when prices fall.
- The exclusion list matters as much as the list of what you do.
- Adjust for life circumstances, not for market performance.
Did you get it?
Why does a written plan work?
Because it moves the decision into a state with no emotional strain.
What absolutely needs to go in alongside your rules?
An explicit list of what you don't do, and a sentence for the crisis moment.
When is adjusting the plan appropriate?
For changed life circumstances or time horizons, not as a reaction to recent market performance.
Check your understanding
Sources and further reading
- Morningstar's annual Mind the Gap study: over the ten years to the end of 2024, the average dollar invested in funds and ETFs earned about 1.2 percentage points per year less than the funds themselves, due to poor timing — evidence of what a written, pre-committed plan can be worth. View source ↗
Related
- Portfolio theoryStage 4
- RebalancingStage 4
- OverfittingStage 4
- Matching questions for this stageQuestions