Frameworks for examining assumptions and risks
Every investment thesis depends on assumptions — about the future direction of a business, the behaviour of competitors, the stability of the macroeconomic environment and the reliability of management. Most of the time, these assumptions are implicit: they are baked into the reasoning without being stated, which means they are never examined. One of the most powerful habits a private investor can develop is the practice of making assumptions explicit and then asking, with genuine curiosity, how confident you actually are in each one.
Our guides on assumption examination walk through practical techniques for surfacing the hidden premises in an investment thesis, categorising them by their importance and their uncertainty, and identifying the specific evidence that would cause you to update your view. This is not about being pessimistic — it is about being honest. A thesis that survives rigorous assumption examination is a much stronger foundation for a decision than one that has never been questioned.

