Amazon

SEC rules force companies to name customers above 10% of revenue. Here's how to use that disclosure to size cyclical and single-point-of-failure risk in your holdings.

Beyond Buffett, a handful of CEOs use the annual letter to reveal how they actually think. Here's a framework for reading them as a forward signal — not PR.

Earnings calls move the quarter. Analyst days move the multi-year thesis. Here's a framework for telling them apart — and weighting them correctly.

A repeatable five-minute framework for building a peer comparison on any S&P 500 stock — how to pick comps, which metrics matter, and where the trap doors are.

A practical framework for deciding when a margin-expansion story beats a revenue-growth story — and the conditions under which the opposite holds.

Income statements lag. For software and subscription businesses, deferred revenue and RPO tell you what's coming — here's how to read them without getting fooled.