French retailer Carrefour launches new online banking service

French retailer Carrefour (CARR.PA) on Tuesday joined the crowded French online banking field with the launch of C-zam, a current account for anyone over 18 that can be opened on presentation of two identity cards and activated online in 10 minutes.The move comes as French telecoms operator Orange (ORAN.PA) and its partner Groupama also aim to launch Orange bank in mid-May in France, where the online banking market is dominated by ING Direct (ING.AS), Societe Generale's (SOGN.PA) Boursorama and