One Substack Post Just Crashed the Stock Market

James van Geelen, the 33-year-old founder of Citrini Research, published a dystopian AI scenario on Substack over the weekend. By Monday, it had triggered a market selloff. The S&P dropped more than 1%, and the software component fell to its lowest since Trump liberation day tariffs in April. Uber, American Express, Mastercard, and DoorDash all lost between 4% and 6%.

The Scenario

Citrini called it "a scenario, not a prediction." It begins now and ends in June 2028, with US unemployment cresting over 10% and an Occupy Silicon Valley movement camped outside OpenAI and Anthropic offices. The cascade starts with AI agents gutting SaaS companies, then rippling into private credit, mortgages, and an unchecked downward spiral.

The report imagines AI agents removing all friction from the economy. Companies like Monday.com, Zapier, and Asana get undercut. Oracle gets forced into a pricing race to the bottom. Consumers use personal AI agents instead of DoorDash, Uber, and Visa. Every middleman business model collapses.

Why Markets Reacted

"It is real doomsday porn stuff, which is always lapped up by readers and market commentators," said Neil Wilson of Saxo Capital Markets. "I do not think it is necessarily going to play out as they see it, but it is a bit of a wake-up call that the economy already no longer resembles the one just a few years ago."

The report went viral partly because the scenario is not entirely implausible. AI agents from Anthropic and OpenAI have already shown capabilities that match the early stages Citrini describes. The question is speed and scale, not direction.