economy

February 11, 2026

200 Lines of Markdown Just Triggered a $285 Billion Sell-Off

A markdown file — not a product, not a platform — a markdown file catalyzed a ~$285 billion single-session collapse across software, financial services, and alternative asset managers.

200 Lines of Markdown Just Triggered a $285 Billion Sell-Off

TL;DR

  • An open-source markdown file from Anthropic, capable of legal contract review, triggered a ~$285 billion single-session market collapse.
  • Companies like Thomson Reuters, RELX, and Wolters Kluwer experienced significant stock declines following the release.
  • The markdown file's simplicity demonstrated that AI could perform tasks previously requiring expensive software subscriptions and human expertise.
  • The event exposed existing cracks in the per-seat SaaS licensing model, rather than directly causing them.
  • The "SaaSpocalypse" revealed that firms charging premium fees for AI-driven analysis face immediate margin issues.
  • The article explores further implications for enterprise software, counterarguments, and how knowledge workers are affected.

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