Anthropic Impact Triggers Historic IBM Drop and $100 Billion Market Cap Loss

Multiple independent and moderately to highly authoritative reports consistently describe a historic single-day drop in IBM’s stock price linked to an event involving Anthropic, specifically the launch of an AI tool related to COBOL modernization. Several mainstream and financial technology sources characterize this as IBM’s worst trading day since 2000, with references to market capitalization losses ranging from $40 billion to $100 billion. These accounts align on both the scale of the event and its attribution to competition or perceived disruption stemming from Anthropic’s technology. While IBM’s official newsroom has not confirmed any link between its financial performance and Anthropic, no credible evidence contradicts the widely reported connection, and the absence of direct denial reinforces plausibility. The primary uncertainty lies in the precise quantification of the market cap loss (the $100 billion figure appears to be an upper-end estimate). Overall, the weight of consistent, authoritative reporting supports the conclusion that the statement is likely true.