Visa, a payments technology company, agreed to acquire a 20% minority stake in Interswitch, an integrated payment and transaction processing company, for $200m. Visa will join Helios Investment Partners, TA Associates and IFC as the primary shareholders in Interswitch. Andrew Toree, Visa’s regional president for Europe, the Middle East and Africa said that Africa — the world’s second-fastest growing banking market — is a “priority region” for the company.