AI trading experimentHe gave Claude $100,000 to trade around the clock. Week one: down 0.12% while the index rose 0.76%
Italian YouTuber Giuseppe Castagna gave Claude a $100,000 paper-trading account and let it buy and sell on its own; the video passed 58,000 views. In the Oct 23 upload he says he built the "automatic trader" with Claude Code in about half an hour without writing a line of code.
Per the video, Claude trades only eight assets (S&P 500, Nasdaq-100 and small-cap index funds, Apple, Microsoft, Nvidia, gold and Treasuries) and can't put more than 20% of the account in one position. Wired to an Alpaca demo account, it wakes at 9 a.m., makes a plan, and leaves notes for tomorrow's self because it remembers nothing between sessions. After building it, Castagna told Claude to break the system "in at least six different ways"; it found and fixed three real holes.
Day one made $76. On day three Claude wanted to add to Nvidia, but the trade would have pushed the position to 21%, so the rule blocked it, and the account closed in the red for the first time. Week one finished down 0.12% against the index's 0.76% gain. Castagna said the system works "not because it understands the market better" but because it has no fear and follows the rules to the end; he plans to try real money next.
Commenters were wary. "I asked Claude and it told me it can't operate autonomously on a real account," one wrote (5 likes); another (6 likes): anyone who found a way to make money with this would never share it. Castagna stresses in the video that it's an experiment, not financial advice.
