A thesis checklist is not a substitute for research. It is a structural test you run after the research is done, to evaluate whether what you have learned has been organized into a form that can guide a real decision, survive a review date, and produce a clear exit signal when things go wrong.
This checklist has six sections covering 25 points. Each section targets a specific failure mode that causes well-researched positions to go wrong anyway. Run through every section before committing capital. Low scores on any section are structural gaps to address before the position is opened, not problems to rationalize once you have a stake in the outcome.
How to use this checklist
Work through each section in order. For each question, assign a point for yes and zero for no. Record your answers alongside your thesis document so you can compare them at review dates to see whether the thesis structure has improved or degraded over time.
Sections that score zero or one require attention before the position is opened. A section that scores half its maximum or below represents a meaningful structural weakness. You can still open a position with structural weaknesses, but the position size should reflect the incomplete thesis: smaller, with a plan to increase size once the structural gap is addressed.
The checklist is designed to be run in 15 to 20 minutes on a thesis you have already researched. If it takes much longer, that is often a signal that the thesis has not yet been organized into a written statement, which is itself the most important precondition for passing this checklist.
Section 1: Thesis anatomy (0-5 points)
Thesis anatomy evaluates whether the thesis has the structural components of a testable claim. A thesis that lacks these components is a narrative, regardless of how well-researched it is.
- Is the core claim stated as a specific expected outcome, not a description of the company? (1 point)
- Is the time horizon explicit and written in the thesis statement itself? (1 point)
- Is there a market-gap argument: a reason why this opportunity has not already been fully priced in by the market? (1 point)
- Are 2 to 5 key assumptions named explicitly in the thesis document? (1 point)
- Does the thesis connect directly to a specific investment decision, including position size and entry range? (1 point)
A score of 3 or below on this section usually means the thesis document needs to be rewritten before proceeding. The structural elements are missing, not just underspecified.
Section 2: Falsifiability (0-5 points)
Falsifiability evaluates whether the thesis has a built-in mechanism for recognizing when it has failed. Without this, positions stay in portfolios based on hope rather than logic.
- Is at least one specific falsifier named? The falsifier must be a business or market event, not a price level. (1 point)
- Is the evidence threshold specific enough to produce an unambiguous answer at the review date? (1 point)
- Would a thoughtful skeptic, reading the falsifier, agree that its occurrence would break the thesis? (1 point)
- Is the falsifier clearly different from "the stock goes down"? (1 point)
- Is a time frame for the falsifier defined and written down before entry? (1 point)
See also the Falsifiability Checklist for a 12-item deep-dive on this section alone.
Section 3: Assumption quality (0-4 points)
Every thesis rests on assumptions. The quality of those assumptions determines how reliable the thesis is as a monitoring tool. Unexamined assumptions are the most common source of unrecognized thesis failures.
- Are the key assumptions ranked by their importance to the thesis? (1 point)
- Are the load-bearing assumptions (the ones without which the thesis fails) identified and separated from supporting assumptions? (1 point)
- Is each assumption specific enough to be monitored with real data? (1 point)
- Has each load-bearing assumption been tested against available evidence before entry? (1 point)
An assumption that cannot be monitored is not a useful assumption. It is a belief. The test for monitorability is simple: name the data source you would use to check whether the assumption is holding at each review date. If no data source exists, the assumption needs to be reframed or the thesis depends on something unverifiable.
Section 4: Time horizon (0-3 points)
The time horizon determines the monitoring cadence and the appropriate type of falsifier. A mismatch between thesis type and time horizon produces either premature exits on sound theses or indefinite holds on failed ones.
- Is the time horizon explicit and written in the thesis? (1 point)
- Does the thesis type match the time horizon? A catalyst thesis should have a short time horizon with a specific catalyst date. A value thesis requires enough time for the discount to close. A compounding thesis needs a multi-year horizon with interim checkpoints. (1 point)
- Is the monitoring cadence matched to the time horizon? A six-month catalyst thesis should not be reviewed annually. A five-year compounding thesis should not be reviewed weekly against price movements. (1 point)
Section 5: Break conditions (0-4 points)
Break conditions are the written triggers that will cause you to exit the position regardless of your emotional state at the time of the event. Their value comes entirely from being defined in advance. A break condition defined after the event is a rationalization.
- Does each key assumption have at least one break condition? (1 point)
- Are break conditions observable and specific enough to produce a clear yes/no answer at the time of evaluation? (1 point)
- Are break conditions calibrated to the assumption they protect rather than to the price of the stock? (1 point)
- Are there written instructions for what to do when a break condition triggers? The instruction can be as simple as "exit the full position within five trading days" or "reduce to half size and reassess within 30 days." The important thing is that the action is written before entry, not improvised after. (1 point)
Section 6: Risk factors (0-4 points)
Risk factors are threats to the thesis that are acknowledged and evaluated but do not currently break it. The difference between a risk and a break condition is that a risk might or might not materialize, while a break condition is the specific threshold at which you exit.
- Are the top three risks to the thesis identified and ranked by severity? (1 point)
- Is the probability and magnitude of each risk estimated, even roughly? (1 point)
- Has a contrary view been sought: have you read or engaged with the strongest argument against the thesis? (1 point)
- Is the position size consistent with the risk assessment? A high-risk thesis should carry a smaller position than a low-risk one with the same expected return. (1 point)
Interpreting your score
Add up your points across all six sections. The maximum is 25.
0-10: Thesis not ready
Significant structural gaps exist. The thesis either lacks the core components of a testable claim (low Section 1 score), cannot identify what would prove it wrong (low Section 2 score), or both. Do not commit capital at this score. Work through the structural gaps first, then re-run the checklist.
11-17: Proceed with smaller position
The thesis has meaningful structural elements but identifiable gaps. Open a half-size or quarter-size position and use the monitoring period to address the low-scoring sections. Set a target date for re-running the checklist, and commit to increasing position size only if the score improves to 18 or above.
18-22: Adequate for standard position
The thesis passes the structural test at a standard level. Open the position at planned size. Note which sections scored below their maximum and plan to address them at the first review date. A 20 out of 25 is a solid thesis, not a perfect one.
23-25: Well-prepared thesis
The thesis is structurally complete. Every section has been addressed with specificity. This score does not guarantee the thesis is correct, but it means the structure is in place to know when it is wrong and to act on that information quickly. This is the appropriate score before sizing a high-conviction position.
Frequently asked questions
What is an investment thesis checklist?
An investment thesis checklist is a structured set of questions you run through before committing capital to a position. It evaluates whether your reasoning is complete, testable, and properly linked to a decision. A good checklist covers thesis anatomy (is the claim specific?), falsifiability (can it be proven wrong?), assumption quality (are load-bearing assumptions named?), time horizon (is it proportional to the thesis type?), break conditions (are there written exit triggers?), and risk factors (are risks ranked and sized?).
How many sections does the investment thesis checklist have?
This checklist has six sections: thesis anatomy (0-5 points), falsifiability (0-5 points), assumption quality (0-4 points), time horizon (0-3 points), break conditions (0-4 points), and risk factors (0-4 points). The maximum score is 25. Each section targets a specific structural failure mode that causes positions to go wrong.
What score should I aim for before opening a position?
A score of 18-22 indicates an adequate thesis for a standard position size. A score of 23-25 indicates a well-prepared thesis. Scores of 11-17 suggest opening a smaller-than-normal position while addressing the gaps identified. A score of 10 or below means the thesis is not ready, and capital should not be committed until the structural gaps are resolved.
Should I complete the checklist before or after doing my research?
After your research but before committing capital. The checklist is not a research guide. It is a structural evaluation of whether what you have learned has been organized into a testable thesis. Running the checklist too early in the research process will mostly produce low scores because you have not yet gathered the information to answer the questions. Running it at the end of research but before the trade is when it has the most decision-making value.
What should I do if my thesis fails a checklist section?
Address the gap before opening a full position. Each section targets a specific structural problem. A low score on falsifiability means you need to name a specific break condition. A low score on assumptions means you need to identify and rank the load-bearing assumptions. A low score on time horizon means you need to match the monitoring cadence to the thesis type. In most cases, the gap can be filled by committing to something in writing rather than by gathering additional research.