Explore

Where would you like to begin?

The Codex is organised into six disciplines. Every article, model and summary is free and open — no account required.

Public markets, intrinsic value and how great allocators deploy every dollar.

Buyouts, acquisitions and the mechanics of owning private companies.

Income, cap rates and the long-lived assets that power economies.

Credit cards, financing, vehicles and tax efficiency for business owners.

Free calculators for compounding, returns, cap rates and valuation.

Original TIC summaries of the books that shaped serious investing.

Reading paths

Curated starting points