Fair Isaac shares plunged 27% on Monday, the worst single day decline for the stock since 1989, and it has fallen 64% for the year. Investors are reacting to the potential loss of pricing power, as VantageScore costs approximately $0.99 per score compared to roughly $10 for FICO. The stock is now more than 68% below its all-time high, marking its deepest drawdown in nearly 20 years as its valuation nears global financial crisis levels.
