Write your thesis down. Let AI watch it.

A thesis you never re-check is just a memory that flatters you. Here's how written, machine-checked theses keep positions honest.

Ask an investor why they bought a stock eight months ago and you'll usually get a reconstruction, not a memory. The position is up, so the story inflates; it's down, so the story shifts to "long-term hold." This is how disciplined entries decay into undisciplined holds.

What an investment thesis is

A thesis is the falsifiable reason you own something, written down before the market has a chance to edit your memory. A good one fits in a few sentences and names the conditions under which it would be wrong. "I own this because services revenue is accelerating and buybacks shrink the float — if services growth drops below double digits, the thesis is broken" is a thesis. "It's a great company" is not, because nothing could ever disprove it.

Why theses need tracking, not just writing

Writing the thesis is the easy half. The hard half is noticing — months later, amid noise — that the facts it rested on have changed. Earnings mix shifted. Insiders started selling. The macro regime flipped. None of these arrive with a notification saying "your reasoning just expired."

That's the part iTrading Buddy automates. You write your thesis in the app, anchored to the price and date you saved it. Claude then periodically re-evaluates it against fresh fundamentals, news, and price action, and reports a status: intact, strengthening, weakening, or broken — with the specific evidence that drove the change. You aren't asked to re-research the position every weekend; you're warned when re-research is actually due.

How to write a thesis worth tracking

  • Name the driver: what specifically makes this stock worth owning — a product cycle, a margin story, a valuation gap?
  • Name the horizon: a swing trade thesis and a five-year compounding thesis fail differently.
  • Name the kill switch: what evidence would make you exit? If you can't answer, you're not investing — you're hoping.
  • Anchor it: record the price and date. Future you will be grateful for the honesty.

Discipline is the actual edge

Most retail underperformance isn't bad stock picking — it's good picks held for reasons that quietly stopped being true, and exits driven by emotion instead of evidence. A written, machine-checked thesis converts "how do I feel about this position?" into "is the original reasoning still standing?" — a question with an answer.

Try it on your own watchlist

iTrading Buddy is free to download for iPhone, iPad, Mac, and Apple Watch, and the free tier includes monthly AI credits to try the research tools on real tickers. Pro adds a 7-day free trial.

Download iTrading Buddy on the App Store →

This guide is for informational and educational purposes only and is not financial advice. Nothing here is a recommendation to buy or sell any security. Always do your own research and consult a qualified financial advisor before making investment decisions.