Wal-Mart Stores Inc and American Express Co are teaming up to offer a prepaid debit card called Bluebird to target lower-income shoppers who may not have bank accounts.

The move will give American Express, best known for its affluent cardholders, a 4,000-store gateway to tens of millions of so-called "underbanked" households and the fees they will generate as technology moves more of their transactions from cash to digital payments.

Read the full article at reuters.com.