Live experiment · paper trading
Can AI beat
the market?
QUANTHEA — AI-native systematic investing. An open experiment with Claude.
QUANTHEA explores what AI can do in investing. A fixed scoring scan rates hundreds of stocks technically and fundamentally every trading day; Claude weighs those scores with news and its own positions and decides via the Anthropic API what goes in and out. Scheduled Python scripts execute paper orders within fixed risk limits. Every decision is visible, measured daily against the S&P 500.
The goal: to beat the index over the long term. You don't have to take our word for it — watch live.
Paper trading · illustrative · not investment advice, not an offer. If it proves itself, only then commercial — with the proper licences.
Claude
+4.3%
S&P 500
+0.9%
Edge
+3.4%
Trading days
80
Net of estimated trading costs (3 bp per trade, over the full broker history) and as price return: the S&P 500 without dividends, because the paper account receives none — as set out in the protocol.
The experiment just started — over a few days this means nothing. That's the point: judge it over the long term, not over a week.
How Claude invests
Fundamental + technical
Claude weighs the scores of the daily scoring scan — valuation, growth and margins against trend, momentum and risk — per stock, with fresh data.
Decides for itself
Claude chooses which names go in and out; a risk model (inverse volatility) sets the weights.
Autonomous, during market hours
Claude analyses and decides via the Anthropic API; scheduled Python scripts place orders on the paper account within fixed risk limits.
Fully transparent
Every decision and every trade is traceable — and honestly measured against the S&P 500 each day.
An honest experiment
We don't promise that AI beats the market — we test it, live and transparently. The portfolio can also underperform the index. Judge it over years, not weeks.
Read more