MILWAUKEE--(BUSINESS WIRE)--Fiserv, Inc. (NASDAQ: FISV), a global leader in payments and financial technology, has completed its acquisition of StoneCastle Cash Management, expanding its ability to deliver innovative insured deposit funding solutions. By integrating StoneCastle's institutional deposit network with the Fiserv ecosystem, including core account processing, digital banking, and payments platforms, Fiserv is creating a differentiated offering that helps financial institutions optimi. ...