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Why Fair Isaac Corporation Plunged Today

The Motley Fool | Sep 29, 2026 3:49 PM EDT

Shares of Fair Isaac Corporation (NYSE: FICO) plunged 25.4% on Tuesday as of 1:32 p.m. EDT. Fair Isaac has long been an investor favorite due to its monopoly on the FICO score, a standard credit score used by virtually all lenders when evaluating borrowers for loans. However, it appears the Trump Administration, along with the rest of the housing industry , is aggressively empowering a new FICO competitor. Needless to say, when a company with a monopoly sees that monopoly erode, the stock can undergo a big rerating. So, it's no surprise to see this big move down today. Continue reading

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