As European retailers continue to expand northwards and eastwards in their quest for growth, the spotlight has fallen on Sweden, where the retail sector is currently the subject of a competition investigation. Some 90% of the Swedish food retail sector is currently controlled by just three players - Axfood, Coop and market leader ICA, a federation of retailers now owned 50% by Dutch giant Ahold, reports Reuters. Axfood is a key player in this virtual triarchy, and has seen its share price rocket nearly 150% in the last year, making it one of the strongest climbers on the Stockholm Stock Exchange.