For investors. And anyone tired of confident AI guesses.
I run AI on my own investment decisions. This is what I find.
I ask AI to help me invest. Then I check its working.
// Free PDF The Prompt Stack: A Field Guide · 20 pages →// Gemini · Options chain · May 2026
"Implied Volatility: ~75.6%
$22 strike · ~$2.13 premium
$23 strike · ~$1.50 premium"
I hadn't given it any chain data. It generated a live options table anyway. Every number was invented.
→ See what happened01 / The Method
The single prompt change that made AI analysis worth using
Start here. The one prompt change that fixes most AI investment outputs.
02 / The Comparison
ChatGPT vs Claude vs Perplexity for stock research
Which tool to open for which task. Per-task verdicts, no hedging.
03 / The Failure
AI limitations in options trading
Where AI breaks. Real fabrications, named tools, named failure modes.
5 AI prompts for earnings call analysis: what the numbers don't tell you
Five AI prompts for earnings call analysis that find what the numbers don't: omissions, hedge patterns, and language drift from last quarter.
Decision ProcessWhat 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.
Tool AuditBest 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.
I started using AI tools to invest because I wanted to know if they were any good. The site is what I found — what I asked, what I got back, and which bits were worth keeping. Read more →
Four prompts that stop AI inventing the answer.
The Prompt Stack: A Field Guide.
20 pages. The full methodology, two real tests, a printable reference card. Free, no email. What's inside →
Download the PDF →Free. No email required.