Corrections & Updates
A printed book is fixed on the day it ships. This page is not. Anything I get wrong in An Outsider’s Playbook or El Manual del Outsider gets recorded here, in both languages, whether or not a future printing can carry the fix.
If you find an error, write to me at juan@juanvegarra.com. Include the chapter and, if you can, the page or location. I answer personally, and I will list what you found.
Book corrections
None recorded as of 14 August 2026. The first edition published on 15 August 2026 in English and Spanish. Confirmed corrections will appear here with the date reported, the edition and format affected, and whether a corrected printing carries the fix.
Toolkit changes
The Stock Diligence Toolkit is a living tool. Every material change is listed here so you know what changed and when.
Version 2.1 · 14 August 2026
- Stopped assuming a United States listing. A market and exchange field was added, and the instruction block now requires the assistant to name which listing it is analyzing before it says anything else, rather than defaulting to a US listing when the same ticker exists on several exchanges.
- Disclosure regimes made explicit. The prompts asked for insider activity in United States vocabulary, which meant a Form 4 filed with the SEC. That filing exists nowhere else. The instruction block now names the equivalents: SEDI filings in Canada, Directors’ Dealings under Article 19 of the Market Abuse Regulation in the EU and UK, and hechos de importancia through the SMV in Peru. Where an absence is reported, the assistant must say whether nothing was filed or whether that filing type does not exist in that market.
- Currency and dual listings. Every figure must now be reported in the currency it was reported in and named as such, and a dual-listed company requires the assistant to state which listing its prices refer to.
- Tax scoped honestly. Any tax point must now name the jurisdiction being assumed and tell the reader to confirm it locally.
- Prompt 06 rewritten. The business diligence prompt no longer names Form 4. It asks for insider or management transactions under whichever regime governs the market where the company trades.
Version 2.0 · 14 August 2026
- Instruction block added to every prompt. Each copied prompt now carries a dated preamble that requires current data, an as-of date on every figure, an explicit flag on anything unverified, a note when a rating is machine-generated rather than analyst work, and a refusal instead of a guess when a requirement cannot be met.
- Instrument check. Every prompt now asks the assistant to identify whether the ticker is an operating company, an ETF, a mutual fund, or a trust before answering, and to switch to fund questions when the answer is a fund. Prompts written for companies were producing confident, well-formatted answers to questions that do not apply to index funds.
- New prompt: Is This the Right Vehicle? For fund holders. Compares expense ratio, fund structure, share class availability, liquidity, and capital-gains distribution history against every cheaper fund tracking the same index, then quantifies the fee difference in dollars.
- Answer structure inverted. All eleven prompts now request the verdict first and the supporting analysis beneath it, in descending order. Previously they asked for analysis and put the conclusion at the end.
- New inputs. Purchase date, account type, and your original reason for buying on the position review. Position size, horizon, and risk tolerance moved up so they feed several prompts at once. Cash and outside assets on the portfolio x-ray. Geography, customer concentration, and equity liquidity on the founder’s balance sheet. Monthly burn and cash reserve on the liquidity ladder.
- Removed. The current-price fields. The assistant looks the price up now, so a stale number typed by hand can no longer corrupt the analysis.
- Disclaimer travels with the prompt. Previously it lived on the page only, so it did not survive the copy and paste.
Version 1.0 · 11 August 2026
Initial release. Ten prompts in English and Spanish, six for a single stock and four for a portfolio, free and without registration.
A note on scope
As of version 2.1 the toolkit works on any listing, and naming the market tells the assistant which disclosure regime to use. Tax references remain written to the United States federal system, state treatment varies, and nothing in the prompts is calibrated to tax rules outside the US. None of it is investment advice or a recommendation regarding any security, and none of the output it produces is mine. That distinction is explained on the toolkit page itself.