Ask what would make you wrong
Research that only looks for reasons to buy is not research, it is advocacy. The most useful hour is the one spent arguing against your own conclusion.
Once you like a business, everything you read starts to support it. That is not dishonesty, it is how attention works - and it is why the most valuable hour in research is the one spent deliberately trying to break your own thesis.
Build the other side seriously
Write the bear case as though you had to defend it: what a thoughtful sceptic would say about the competition, the balance sheet, the customer concentration, the management's incentives, the price. If the bear case is easy to dismiss, you have not built it properly.
The pre-mortem
A useful exercise: imagine it is three years from now and the investment has clearly failed. What happened? Answers tend to arrive quickly and are usually more specific than a generic risk list - and they are exactly the things worth monitoring.
Why this makes holding easier, not harder
Counter-intuitively, having genuinely examined the downside makes it easier to sit through volatility later. The bad news that arrives is usually something you already considered, so it changes little. The investor who never looked at the bear case is the one most shaken when someone else articulates it.
Got a question on what you have just read - on bottom-up research, quality investing, or the Category III AIF structure? Write directly to the office. These essays are general views only, not investment advice.
A research-led equity investor with over twenty years in the Indian markets. Designated Partner of Stonebridge Advisors LLP, Investment Manager of Anchor Rock Investment Fund - I, a SEBI-registered Category III AIF.