Shares of Fair Isaac took a massive hit on Tuesday as investors reacted to news that the company is losing its long standing grip on the mortgage industry. The provider of the ubiquitous FICO score saw its stock price plunge roughly 18 percent following an announcement from federal officials that the government will no longer rely exclusively on their specific rating to determine mortgage pricing.

The shift comes after Bill Pulte, the Director of Federal Housing, revealed the policy change late Monday evening. For years, FICO has enjoyed a virtual monopoly over how lenders assess risk and set rates for homebuyers across the country. By opening the door to alternative scoring methods, the government is effectively dismantling a systemic dependency that had previously guaranteed fair Isaac a dominant position in the housing market.

Market analysts noted that the sudden drop reflects deep concerns over future revenue streams for a company whose business model relied heavily on being the gold standard for home loans. While other credit scores exist, they lacked the regulatory mandate required to challenge FICO’s dominance until now. This move toward competition signals a broader effort by regulators to diversify how creditworthiness is measured and potentially lower barriers for borrowers.

As traders scrambled to adjust their positions throughout Tuesday, it became clear that this represents more than just a temporary dip in share value. The loss of its exclusive status marks a fundamental pivot in how mortgages are priced in America, leaving Fair Isaac to navigate a landscape where it must now compete with rivals rather than acting as the sole gatekeeper of homeowner financing.