Fundamental Analysis

Building the Investment Thesis

Pull it all together. Combine the statements, the ratios, the business quality and the valuation into a written investment thesis — a falsifiable claim about a mispricing, with a value range, a margin of safety, catalysts, a bear case, a position size and a verdict you can be held to.

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StartLesson 1 · What a Real Investment Thesis Looks Like

What you’ll leave with11 lessons · 11-line playbook

An investment thesis is a falsifiable claim about a mispricing — not a description of the company, and not a hope that it goes up.
Your edge is a variant view — one specific, defensible place you differ from the consensus. No variant, no edge.
Triangulate value from three lenses — DCF, comps and an asset floor — into a range; weight the one you trust most, and when they disagree, widen the range.
Demand a margin of safety — (value − price)/value — judged against the whole bear/base/bull range; a wide cushion forgives error, a thin one under a wide range is a trap.
Name the catalyst — the event that closes the gap and roughly when — and check the horizon: cheap can stay cheap, and a fat upside over many years is a thin annual return.
Steelman the bear case and run a pre-mortem before you buy — then name your kill-switch: the one observable that says the thesis is broken. Everything else is noise.
Size by conviction × margin of safety — relative weights that rank your ideas against each other. Your risk tolerance sets the scale; a single-name cap stops any one idea from betting the farm.
Write the whole thesis on one page, in order: claim, variant, value and margin of safety, catalysts, bear case and kill-switch, position, verdict. If a line doesn't change the decision, cut it.
Monitor the thesis, not the ticker: track the KPIs you'd expect if you're right. Hold while they hold, trim when a soft one slips, and exit the instant the kill-switch fires — however cheap the price looks.
Work up every company end-to-end with the same six-step pipeline — value, margin of safety, catalyst, bear case, size, verdict — and let the page decide. The discipline is running it honestly both ways: a well-earned pass is as valuable as a buy.
The whole FA track is one pipeline: read the filings (S29), diagnose the numbers (S30), judge the moat (S31), value it intrinsically (S32) and relatively (S33), then demand a margin of safety and write a falsifiable, sized, monitored thesis (S34). One tool never decides — the assembled argument does.

Building the Investment Thesis

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