Fair Isaac Shares Fall 26% After FHFA Opens Mortgage Scoring to VantageScore

What happened

Shares of Fair Isaac Corp. (ticker: FICO) closed at $618.385 on Tuesday, September 29, 2026, down 26.46% from the prior close of $840.89, according to price data. Volume was 3,696,618 shares against an average of 355,648 — roughly 10.4 times normal, with a z-score of 14.27.

The trigger was an announcement by Bill Pulte, director of the Federal Housing Finance Agency, that Fannie Mae and Freddie Mac will adopt a unified mortgage pricing grid that accepts both FICO and VantageScore credit scores, according to Yahoo Finance, Investing.com and Forbes. Investing.com described the move as breaking FICO's monopoly in the mortgage market. Forbes reported FICO shares fell 27% on Tuesday; Barron's reported a decline of about 20% at one point and said the stock was the worst performer in the S&P 500 for the session.

Yahoo Finance reported that the policy change raises questions about FICO's fee stream in mortgage lending.

Some outlets published different figures. A Pluang news feed said shares fell 26%, and tickerspark.ai said they tumbled 21.69% in extended-hours trading; those specific numbers could not be confirmed against the price data above.

What Fair Isaac does

Fair Isaac is a US data and analytics company best known for the FICO score, a three-digit number that summarizes how likely a borrower is to repay debt. Lenders use it to decide whether to approve a loan and what interest rate to charge.

The company earns fees when lenders and other users pull FICO scores. Mortgage lending is a large slice of that business, because Fannie Mae and Freddie Mac — the two government-sponsored enterprises that buy most US home loans — have required FICO scores in the underwriting of the mortgages they purchase.

What this means

Fannie Mae and Freddie Mac do not make loans. They buy them from lenders, package them into securities and guarantee the payments. Because they buy such a large share of US mortgages, their rules effectively set the standard for the whole mortgage market. A requirement that their sellers use only FICO scores gave FICO a captive market.

The FHFA is the regulator that oversees Fannie and Freddie, which is why a statement from its director moves the price of a scoring company. A 'unified pricing grid' means loan-level pricing adjustments — the add-ons that raise or lower a borrower's mortgage rate depending on the risk they present — would be applied the same way whether a lender uses FICO or VantageScore. VantageScore is a competing score built by the three major credit bureaus: Equifax, Experian and TransUnion.

For readers new to the term: a credit score is a prediction, expressed as a number, of how likely a borrower is to fall behind on payments. Lenders have used FICO's version since the late 1980s; VantageScore was launched in 2006 and has been a smaller player in mortgages specifically because the two enterprises' rules did not accept it. Tuesday's announcement, as described by the sources, changes that.

Fair Isaac's revenue model in this segment is transaction-based: every time a lender pulls a score for a mortgage application, the company is paid. If lenders can satisfy Fannie and Freddie with VantageScore instead, some of those pulls — and the fees attached to them — could go to the competing score. That is the connection the sources draw between the announcement and the share price move; none of them quantify the revenue at stake.

The sources do not state a timeline for the change, whether it requires further FHFA action, or whether lenders must offer both scores or may choose one. Those details were not in the reports reviewed.