Writing

The OffHours blog

Plain-English essays on how we do the work — the quality screen, the Buy Zone, and the fears that make good businesses cheap.

• Why ROIC matters more than ROE

  ROE is the easier number to fool. Here's why our quality screen is built on return on invested capital sustained across a decade — with a worked example.

• Why I built OffHours Investing

  After two decades in tech, my biggest regret wasn't a career move — it was how I managed my money. Why I built a tool to track quality compounders without it eating your life.

• How we define the Buy Zone

  Not a bottom call. The Buy Zone measures each quality stock against its own five-year valuation history — here's exactly how the four zones work.

• Why one ruler fails: the five business archetypes

  Costco runs on razor-thin margins. Moody's runs on enormous ones. Both are great businesses. Here's why we classify companies into five archetypes before scoring them.