In nine host countries, the average aggregate market share is still important, accounting for 10% to 29% of domestic banking assets. Finally, in eight host countries, the average aggregate market share is at a lower level, ranging from 1% to 9%.
Overall, in 60% of all EU countries at least one of the key cross-border players accounts alone for more than 15% of domestic banking assets, and the average market share of the group with the greatest activity in these countries is 26%. 2  BIS Review 45/2007  These elements support the need for enhanced cross-border supervision at the group level.