Framework · Discipline
No Hard Rules at Selection, Discipline at Execution
The book attacks dogma when you are choosing a method. It demands rigour once you have chosen. The two never meet, and confusing them is how both drift and fanaticism start.
The distinction in one sentence
No hard rules is about the choice of method. Discipline is about the execution of whichever method you chose. Flexibility about the menu. Discipline about the meal.
There is no universally correct method, no asset class that is always the answer, no allocation that works for every investor in every regime, and no rule that survives every life stage. That claim lives at the selection layer. It is why copying someone else’s method so often fails: their levers are not yours.
Once you have chosen a method that fits your levers and the conditions, you execute it with pre-defined risk, pre-defined exits, scheduled reviews and honest thesis updates. You do not renegotiate the rules with yourself under pressure. That claim lives at the execution layer. It is non-negotiable in every method.
Where people mix them up
- “There are no hard rules about when to sell.” Wrong layer. The rules exist; the method dictates them. What varies is which method’s rules you are under.
- “There are no hard rules about position sizing.” Wrong layer. Size rules exist. They depend on the levers and the method. You still must have them, written, before entry.
- “Trust your gut.” Almost never at execution. At selection, temperament is information. At execution, gut is how plans die.
- “Every method works.” Only the first half. The full line is: every method works for the right investor, at the right time, executed with discipline. Outside those conditions, every method fails.
A six-question filter
When a passage, a tip or your own rationalisation pushes back on a rule, ask:
- Am I attacking method dogma or execution discipline?
- Does this say I get to choose, or that I get to wing it?
- If I applied this to the next trade, would my process get tighter or looser?
- Is “no hard rules” being used to dismiss something I still have to do?
- Could a dogmatist quote this and feel vindicated?
- Could a lazy investor quote this and feel vindicated?
Choosing is on-brand. Winging it is not. Tighter process is correct. Looser is a defect. A dogmatist or a lazy reader nodding is a signal to revise.
What to do with this
Write the method you are currently using, or most tempted by. Under it, write the three execution rules you will not renegotiate (invalidation, size, review cadence). If you cannot write the rules, you have not chosen a method. You have chosen a mood.