Know why and when to sell
Use thesis, valuation, portfolio risk, and personal constraints—not a single price rule.
After this module
You can distinguish Exit, Trim, and Keep decisions and document a reason that can be reviewed later.
Decision fork
Keep / Trim / Exit
Exit: the case is broken
An exit is strongest when evidence invalidates the reason for ownership and the expected return no longer compensates for risk.
- Identify the specific invalidation trigger.
- Check whether the issue is temporary, structural, or already reflected in price.
- Avoid moving the trigger after it fires merely to avoid admitting error.
Example
A thesis based on low churn is challenged structurally if churn remains elevated across cohorts despite product fixes.
Trim: the size is wrong
A thesis can remain intact while the position becomes too large for the portfolio or your circumstances.
- Measure concentration after market moves.
- Consider overlap, liquidity, taxes, and transaction costs.
- Write the target size and why it fits the risk budget.
Valuation and alternatives
Selling can be rational when price embeds an implausible outcome or another use of capital offers a better risk-adjusted return.
- Compare forward outcomes, not your purchase price.
- Use a range and include the possibility that quality persists longer than expected.
- Do not manufacture activity when the alternative is simply holding cash.
Common trap
‘It doubled’ and ‘I need to get back to even’ anchor the decision to your history, not future outcomes.
Personal constraints count
Goals, tax rules, emergency needs, and risk capacity can justify a sale independent of the company.
- Separate personal-liquidity decisions from thesis judgments in the journal.
- Check local tax and settlement rules before acting.
- Choose an order type consistent with liquidity and urgency.
Try it yourself · no real money
Separate Keep, Trim, and Exit
Change the reason for considering a sale. A thesis failure, an oversized position, and a personal cash need are different problems.
Decision path
Keep case to investigate
This is a diagnostic path—not a personalized sell recommendation.
Investment replay
Practice the process before your money is involved
Move through a fictional holding one update at a time. Bullboard scores whether the action matches the written process—not whether it happens to make money next week.
Quarter 1
Revenue grows 18%; gross margin improves. The position reaches its planned size.
What is the next process-consistent action?
Knowledge check
Which is the weakest standalone reason to sell?
Put this module to work
Continue with a Bullboard tool
The lesson gives you the framework. These tools help you apply it to a real decision.
Position sell flow
Preview FIFO lots, proceeds, cost basis, and estimated realized P&L before confirming a sale.
Open a position →Closed positions
Study completed outcomes separately from current holdings and active risk.
Review past exits →Decision journal
Compare the exit reason with the original thesis instead of judging only by what price did next.
Review the decision →