Fair Isaac's moat has narrowed but not disappeared, so the selloff over VantageScore may be an opportunity. FHFA Director Bill Pulte let all Fannie Mae and Freddie Mac lenders use VantageScore 4.0, ending FICO's effective mortgage monopoly, and floated a cheaper bi-merge model. That brings a lower-cost rival and threatens pricing power. But FICO is deeply embedded in lender systems, underwriting, securitizations and decades of data. It works only if valuation leaves a margin of safety. x.comÂ