The return of volatility helped foreign exchange stage a third-quarter comeback at Deutsche Bank, driving debt sales and trading revenues up by more than many of the German bank's rivals.

Stripping out the effects of valuation adjustments, revenues from Deutsche Bank's debt sales and trading business - which is often referred to as fixed income, currencies and commodities at other banks - climbed 18% to €1.6 billion in the three months to the end of September from €1.3 billion in the same period last year.