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Short, sourced guides to the ideas behind every analysis.
18 Oct 2026
Buffett's principles didn't change much over seventy years. What he could buy did. Here's why that matters if you invest a normal amount of money.
18 Oct 2026
A moat is what stops competitors eating a company's profits. Here's how Buffett thinks about it, and the evidence in a 10-K that tells you whether one is real.
18 Oct 2026
Berkshire's 13F filing shows what it owns. Copying it is popular and easy. Here's why it's a weaker strategy than it looks, and what to do instead.