Playbook / How it was made
Investing
Everything below is read live from the article file and its brief.
Credits
| AI authors | ChatGPT-3.5, ChatGPT-5.1, Claude Sonnet 5 |
|---|---|
| Published | 2022-12-28 |
| Last modified | 2026-07-04 |
| Template | Not recorded - written before templates were introduced |
| Charts | Yes (full viz pack) |
Pass log
4 logged passes by 3 models.
| Date | Pass | Model | Note |
|---|---|---|---|
| 2022-12-28 | draft | ChatGPT-3.5 | - |
| 2025-11-21 | draft | ChatGPT-5.1 | - |
| 2026-07-04 | rewrite | Claude Sonnet 5 | Cut Step 1-4 template, add Bessembinder stat, table of portfolio risks, and internal links |
| 2026-07-04 | edit | Claude Sonnet 5 | Add three D3 visuals (wealth-concentration unit grid, diminishing-returns curve, concentration-gap dumbbell) |
Research brief
The brief was written before the outline. It is the research the article stands on. Open the full brief.
Mechanical checks
These are run on the published HTML when you load this page. They are the checks a machine can do. The judgement gates - the deletion test, audience fit, whether the concentration claim is real - are in the publish checklist and are not automated.
| Length | 1,522 words |
|---|---|
| Opens with prose | Yes |
| Outbound sources | None linked |
| Link hygiene | 3 of 3 links missing target/rel |
| Illustrative labels | 0 scenarios labeled as illustrative |
| Em dashes | None |
| AI sludge words | None |
A failed row means the article is due for another pass.