(NYSE:FIS) MILWAUKEE--(BUSINESS WIRE)--Fiserv, Inc. (NYSE: FI), a leading global provider of payments and financial services technology, has published the Fiserv Small Business Index for August 2025, with the seasonally-adjusted Index holding steady at 149. Year-over-year sales (+3.9%) and transactions (+3.7%) remained strong, as resilient consumer spending continued. Average ticket sizes (+0.3%) also grew compared to 2024. Month-over-month sales were relatively unchanged despite an increase in foot traff