BOSTON, Oct. 29, 2025 (GLOBE NEWSWIRE) -- Block & Leviton is investigating Fiserv, Inc. (NYSE: FI) for potential securities law violations. Investors who have lost money in their Fiserv, Inc. investment should contact the firm to learn more about how they might recover those losses. For more details, visit https://blockleviton.com/cases/fi. What is this all about? Shares of Fiserv dropped more than 40% on October 29, 2025. This plunge followed the company’s cut to its financial outlook and weak quarterly re ...