Insights

Short, rigorous pieces on what the numbers actually say.

September 2026

A Better Way to Assess Betas

A mechanically calculated beta can be statistically correct and still economically misleading. When a market index becomes dominated by a few companies, historical betas drift even though industry fundamentals haven’t changed. Betas measured against an equal-weighted index hold far steadier, and the difference matters more for valuation than most people assume.

By Matheus de Oliveira Ramos, Stijn Broekema and Tim Koller · Read the article →

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