Key TakeawaysFair Isaac shares plummeted 20% in Tuesday’s premarket session to $675.39, marking the steepest decline in over six years.Federal Housing Finance Agency head Bill Pulte revealed that Fannie Mae and Freddie Mac would consolidate to a single mortgage pricing framework.VantageScore, a competing credit model developed by Equifax, TransUnion, and Experian, now joins FICO Classic on the pricing grid.Rocket Mortgage announced VantageScore 4.0 will become its default credit scoring system for qualifying mortgages beginning Q4.Fair Isaac shares have tumbled 50% year-to-date and remain significantly below the November 2024 peak of $2,382.40.Shares of Fair Isaac ($FICO) plunged 20% during Tuesday’s premarket hours, bottoming at $675.39. The collapse represents the company’s sharpest single-day decline in more than six years.Fair Isaac Corporation, FICOThe dramatic selloff came after a 2.6% retreat on Monday. The combined losses pushed Fair Isaac toward its weakest closing level since April 2023.The catalyst emerged from a social media announcement by Bill Pulte, who leads the Federal Housing Finance Agency. His statement outlined plans to streamline mortgage pricing mechanisms for consumers.Consolidation Into One FrameworkFannie Mae and Freddie Mac are transitioning from their dual pricing structure to a unified grid. The consolidated framework incorporates VantageScore alongside FICO Classic.VantageScore represents a collaborative effort among the three major credit bureaus: Equifax, TransUnion, and Experian. The model has persistently challenged FICO’s market position in credit assessment.For generations, prospective homeowners required a FICO score to qualify for mortgage financing. The regulatory shift eliminates this mandatory requirement for lenders.Pulte’s announcement clarified the structural changes. He explained that the government-sponsored enterprises would adopt a unified pricing grid incorporating VantageScore alongside the established FICO Classic framework.This regulatory action follows earlier moves targeting FICO’s market dominance. On September 9, the FHFA eliminated the prerequisite for lenders to obtain advance written authorization before implementing VantageScore 4.0.Major Lender Shifts StrategyRocket Mortgage intensified the competitive pressure on Monday. The mortgage giant, operating under Rocket Cos., declared it would pioneer the adoption of VantageScore 4.0 as its primary scoring mechanism.The company confirmed VantageScore would become the default option during the fourth quarter for mortgages destined for Fannie Mae and Freddie Mac. The decision marks a significant endorsement from one of America’s largest residential lenders.Fair Isaac’s stock trajectory has deteriorated steadily since reaching its all-time closing high of $2,382.40 last November. Pulte has consistently advocated for expanded competition within the credit scoring industry.The shares have shed 27% during May alone. Through Monday’s close, the stock had declined 50% since the start of 2025.Related credit reporting stocks experienced collateral damage. TransUnion retreated 4.3% while Equifax fell approximately 4% in premarket activity, though Rocket Cos. shares advanced 1.6%.Broader market conditions offered no refuge on Monday. The S&P 500 ended essentially unchanged, the Dow Jones recorded modest gains, and the Nasdaq finished marginally lower, indicating FICO’s decline stemmed entirely from company-specific developments.Fair Isaac had previously retreated from a 52-week peak of $1,998.01. Extended trading sessions on Tuesday drove the stock to a new 52-week low approaching $832.The post Fair Isaac (FICO) Stock Plunges 20% as VantageScore Breaks Into Mortgage Market appeared first on Blockonomi.