The purpose of one page
A one-page case forces prioritization. It should allow a PM or reviewer to understand the recommendation, expectation gap, evidence, valuation, timing, and downside without opening the full model. It isn't a miniature annual report.
Header information
Include the security, ticker or instrument, price and date, recommendation, horizon, target or value range, downside range, expected return, and current position status if appropriate. The date is essential because a case can become stale quickly.
Thesis block
Use two to four thesis points. Each point should state the market belief, the variant, and the financial implication. Avoid broad statements such as “strong management” unless the evidence and effect are specified.
Estimate and valuation block
Show the few estimates that matter: revenue, units, price, margin, cash flow, loss rate, recovery, or another strategy-specific driver. State the valuation method and the assumptions responsible for the range. A target price without method isn't decision-ready.
Catalyst and timeline
List the mechanism, expected timing, and evidence that will update the case. Some theses resolve through several data points rather than one event, so show the sequence.
Risk and falsifier block
Separate business or thesis risk, valuation risk, balance-sheet risk, market or factor risk, and technical risk. State what is monitored and what action follows if the threshold is crossed.
Source and confidence block
Cite the primary sources, information cutoff, and any important data limitations. Label which assumptions are observed, estimated, or inferred.
Long and short symmetry
Use the same discipline for longs and shorts. A long needs downside value and a falsifier. A short needs a realistic upside scenario, borrow and squeeze analysis, and a timing mechanism. The format should expose asymmetry rather than favor one direction.
Relationship to the full work
The one-pager is a navigation document. The supporting file may include the model, source log, industry analysis, legal documents, channel work, scenario tables, and decision history. The one page should remain stable enough to compare with later outcomes but update when the thesis genuinely changes.