I test AI against my own investment decisions. This is what I find.
A sceptical investor's record of what AI actually does when there's real money involved.
What AI gets right (and wrong) about options trading
AI for options trading: a working taxonomy from real covered-call trades. Four uses where it helps. Six failure modes where it invents numbers.
Best AI tools for earnings analysis: I tested three on a real results release
The best AI tools for earnings analysis are not the same tool. I tested ChatGPT, Claude and Perplexity on Meta Q1 2026 — four dimensions, one winner per task.
Tool AuditChatGPT vs Claude vs Perplexity vs Gemini for stock research: a real test
ChatGPT vs Claude vs Perplexity vs Gemini: I ran five stock research prompts across all four. One fabricated options data. Named winner per task, no hedging.
Tool AuditBest free AI tools for stock research
The best free AI tools for stock research, tested at the actual free tier — seven tools sequenced by research stage, with the honest limit on each.
Four prompts that stop AI inventing the answer.
Run in sequence, each stage forces the model to show its working before the next begins — evidence before inference, a verdict that has to earn its place.
Be a cautious analyst, not a cheerleader.
Separate observable facts from assumptions.
Find what could go wrong and what would prove the view wrong.
One practical action. With a confidence level.
I started using AI tools in my investment process because I didn't trust them. The site is the record of what happened — what I asked, what I got back, and which bits were worth keeping. Read more →
The Prompt Stack: A Field Guide.
A 20-page PDF documenting the methodology behind every analysis on this site — four stages, five copy-paste prompts, two real-world tests. What's inside →
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