Discipline and time horizon

"If you can stay objective throughout that, if you can detach yourself temperamentally from the crowd, you get very rich, and you won't have to be very bright — I'm sure you are, but it doesn't take brains, it takes temperament."

If you can stay objective throughout that, if you can detach yourself temperamentally from the crowd, you get very rich, and you won't have to be very bright — I'm sure you are, but it doesn't take brains, it takes temperament.

The biases covered so far share a common antidote: a plan written before you buy, and a time horizon long enough that you're not distracted by the noise of any single day.

Writing down your thesis before buying - why this business, at what estimated fair value, what would need to happen for the decision to change - takes ten minutes and is there to reread later, when emotions run stronger than judgment: during a crash, during a bubble, or simply after months where the stock hasn't moved.

A business's value changes with its revenue, its margins, its debt - figures that move over quarters and years, not hours. The price, on the other hand, moves every minute, pushed by news, market mood, and the same biases covered in this module. Checking your portfolio several times a day mostly exposes you to price noise, not to the signal of value.

Patience isn't passivity: it's the deliberate choice to give your judgment the time to be confirmed or disproven by the facts, instead of by today's price.