---
chapter: 2
title: "The machine that buys machines"
ticker: BRK-B
company: "Berkshire Hathaway"
buys:
  - date: "2026-08-31T17:47:00-04:00"
    price: 504.52
    shares: 1.982
proofs:
  - /proofs/ch02-mths5g228s7ku6.png
exitTest: "I'll sell if the discipline and culture that built Berkshire clearly change after its founders — or if, over a couple of years, my code's signals show no real edge and I conclude I was just guessing."
---

**What it is** — Berkshire Hathaway is Warren Buffett and Charlie Munger's holding company. It owns whole businesses (insurance, a railroad, energy, retail) and big stakes in public companies. The Class B shares (BRK-B) are the affordable way to own a slice.

**Why now** — The trigger was my code — the small signal system I've been building to tell me when it might be a sensible time to start a position. It flagged Berkshire today, so I opened a small starter position and I'm sitting tight.

**The bet** — I can't value Berkshire myself yet. What I'm really counting on is two things: that a diversified, conservatively-run collection of good businesses is a sensible place for a beginner to start, and that my code's timing, tested over time, adds a little edge. Mostly it's a position I'm happy to hold for a very long time while I learn.

**What could go wrong** — My code is new and unproven; the signal could be noise. Berkshire is also moving into a future beyond its founders, and no company stays great forever. "It's Buffett's company" is not, by itself, a reason — I have to keep learning why it's actually a good business.

> The record continues below this line — append-only, each entry dated.
> The original text above is never touched. Quarterly checks, splits,
> dividends, and any options hedge on this position go here.