AI冲击下IBM跌超13%，创25年来最大跌幅

Group 1 - IBM's stock closed at $223.35, marking a decline of 13.15%, the largest drop since 2000. The cumulative decline in February has reached 27%, the largest monthly drop since at least 1968 [2] - Concerns about IBM's mainframe business have arisen following the announcement by AI company Anthropic regarding its Claude Code product, which automates much of the research and analysis work related to the COBOL programming language [2] - COBOL, a programming language dominant in business data processing since the late 1950s, is crucial for payment processing and retail transaction systems, which are core to IBM's business [2] Group 2 - IBM's Q4 2025 earnings report revealed revenue of $19.69 billion, a 12% year-over-year increase. Software revenue was $9.03 billion, up 14%, and consulting revenue was $5.35 billion, up 3.4% [4] - The core driver of IBM's performance was the software division, which accounted for 45.8% of total revenue and had a high gross margin of 85.0%, significantly enhancing overall profitability [4] - The infrastructure segment, boosted by strong sales of IBM's latest mainframes, generated revenue of $5.13 billion, exceeding average expectations [4]