Walmart says it will launch a fintech start-up, with Ribbit Capital owning a minority share in the new company (Melissa Repko/CNBC)

Melissa Repko / CNBC:
Walmart says it will launch a fintech start-up, with Ribbit Capital owning a minority share in the new company� —  - Walmart said Monday that it will launch a fintech start-up with Ribbit Capital, one of the investment firms behind Robinhood.  — The retail giant interacts with millions of customers …