Core principles

Four questions every thesis must answer

01

Start with the business

Understand the customer, unit economics, industry structure, competitive advantage, and reinvestment runway before opening the valuation model.

02

Underwrite expectations

Treat price as a set of embedded assumptions. The opportunity exists only when the market’s expectations differ from a defensible operating reality.

03

Make downside concrete

Stress leverage, cyclicality, working capital, capital intensity, and management execution. A low multiple does not create downside protection by itself.

04

Write the disconfirming case

Define in advance what would invalidate the thesis, which evidence deserves the most weight, and how the position should change when facts change.

Workflow

From curiosity to position

A practical sequence that keeps research tied to a decision rather than an ever-expanding collection of facts.

  1. 01 · Frame

    Write the question

    State what must be true for the security to be mispriced and identify the few variables that will determine the outcome.

  2. 02 · Research

    Build the operating view

    Use filings, competitors, customers, management commentary, and industry structure to connect qualitative evidence to operating drivers.

  3. 03 · Model

    Translate drivers into value

    Model cash generation and reinvestment across coherent bear, base, and bull cases. Reverse-engineer what today’s price already assumes.

  4. 04 · Decide

    Specify the edge and the risk

    Write the variant perception, the strongest counterargument, falsification points, expected return, and position-size logic.

  5. 05 · Review

    Separate process from outcome

    Revisit the original underwriting, distinguish bad luck from bad reasoning, and convert recurring errors into checklist items.

The checklist is a memory aid, not a substitute for judgment.

Its most valuable items came from painful investments: normalize margins, respect control, put a cost on time, and demand a credible path from strategic potential to free cash flow.

Read the postmortems →