Defense stocks gained on the back of Israel's attack on Iran, extending large rises for a sector that has benefited from a series of conflicts in recent years. Shares of European arms makers have been buoyant this year as countries across the region pledge to raise spending on defense amid tensions related to Ukraine and elsewhere. Germany's Rheinmetall, for instance, is up more than 190% this year, having already soared in value since the start of the war in Ukraine.