Investment thesis tracker for seeing whether your view still holds
A thesis tracker helps you compare new information against the original case, so a position does not drift away from the reason you bought it.
Who this is for
- Investors who write a thesis but do not always revisit it.
- People who want a clear current view after earnings or major updates.
- Investors who want disconfirming signals visible before emotions rise.
What you track
- The core reason and time horizon.
- Assumptions, disconfirming signals, and support to monitor.
- Whether your view still holds at each review.
- Decision notes showing what changed and what action followed.
Example workflow
Define the case
Write the claim, assumptions, risks, and review triggers.
Update with support
Attach sources and notes to the specific assumption they support or challenge.
Review your current view
Decide whether your view still holds, is stronger, weaker, broken, or still watch-only.
Track whether the case still holds
An investment thesis tracker is useful only if it keeps assumptions testable. Giroku turns the case into saved support, disconfirming signals, Review notes, and Decisions that can be revisited later.
Current view
State whether the case is intact, stronger, weaker, broken, or still watch-only at each review.
Assumptions and support
Connect sources and notes to the assumption they support or challenge.
Review triggers
Define the event, metric, or source that should make you update the view instead of reacting to every headline.
Worked example: a thesis that changes without being rewritten
Fictional sample only: Northstar Components, a mid-cap industrial supplier. The example shows a review process, not a recommendation or prediction.
Original case - 12 January
Current view: Service revenue can compound if automation demand stays healthy and customers keep attaching higher-margin support contracts.
What changed: Service attach rate is rising, backlog is stable, and no customer represents more than one quarter of revenue.
Review response: Mark the view intact and schedule a review after the next earnings report.
First review - 4 April
Current view: Demand still looks healthy, but the margin assumption is less certain than it was at purchase.
What changed: Backlog grew, while service margin fell after a pricing change that management described as temporary.
Review response: Mark the view weaker, preserve the original case, and add a margin recovery target for the next review.
Second review - 18 July
Current view: The demand case still holds, but customer concentration has become the main open concern.
What changed: Service margin recovered, while the largest customer rose to 31% of revenue after a major contract renewal.
Review response: Mark the view partly / unsure and review concentration after the next filing instead of rewriting the January thesis.
Invalidation criteria
- Service margin stays below the original floor for two consecutive quarters.
- Customer concentration rises above the written limit without a credible diversification plan.
- Management stops reporting the operating measure that the case depends on and provides no useful replacement.
Investment thesis tracker vs spreadsheets and general notes
The right tool depends on the job. Giroku is most useful when the missing layer is a dated, ticker-level record of reasons, evidence, Decisions, and later reviews.
Spreadsheet
Useful for: Flexible calculations, valuation models, sortable fields, and portfolio math.
Boundary: Long-form reasoning, source context, and changes between reviews usually need a separate convention or document.
General notes app
Useful for: Flexible writing, clipping, linking, and personal organization.
Boundary: Ticker relationships, Decisions, trades, review status, and next-review continuity depend on a structure you maintain yourself.
Giroku
Useful for: Keeps the current view, Saved sources, Decisions, trades, targets to review, and Review notes around one ticker.
Boundary: It complements a broker and detailed valuation model; it does not execute trades or replace spreadsheet analysis.
How Giroku helps
- Connects your reason for owning a stock with future reviews.
- Keeps contradicting information visible instead of buried in old notes.
- Lets decisions reference the view that existed at the time.
Common questions
What should an investment thesis tracker monitor?
It should monitor the original reason, key assumptions, support, disconfirming signals, current view, and next review trigger.
Can Giroku show when a view changed?
Yes. Review notes and Decisions create a timestamped record of what changed and what action or non-action made sense at the time.
Does Giroku score or recommend stocks?
No. Giroku helps organize your own research and review process. It does not provide financial advice or automated buy/sell recommendations.