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The Optimal Blue lawsuit: Data transparency or market manipulation? 

Nov 05, 2025By

Mortgage-pricing data has gone digital. But when does transparency turn into coordination?
In early October 2025, mortgage-technology provider Optimal Blue and three major lenders were sued in a proposed class-action alleging price-fixing and market manipulation in U.S. mortgage rates. At the center of the case is a question that goes well beyond one software firm: when does sharing data make markets fairer, and when does it quietly tilt them?