Anthropic Launches Claude Cowork Plugins, Sentiment Drives Software Sector Sell-Off

Anthropic released Claude Cowork plugins on February 3, 2026, enabling file reading, editing, and industry-specific automation. The move triggered a sell-off in SaaS and data services stocks as investors worried AI could disrupt traditional software-as-a-service revenue models and workflows. Supporting details show the Nasdaq-100 Software ETF down 5.69% on February 6, 2026, its steepest one-day drop since April 2025. Thomson Reuters (TRI) fell 15.83% and Legalzoom (LZ) 19.68% on the same day, rebounding slightly Wednesday. RELX (-14% Tue, -1.5% Wed), FactSet (FDS -10.51%), and Blue Owl (OWL -9.76%) also declined. Analysts note the reaction is sentiment-driven, with mixed views on AI’s long-term impact on jobs and business models. While some warn of disruption to entry-level white-collar roles, others caution overblown fears and expect normalization as AI adoption yields measurable benefits.