Dresdner Kleinwort Wasserstein is the only investment bank to have claimed formal accreditation for its role in the controversial auction of Yuganskneftegaz, the oil production assets of oil giant Yukos which was auctioned by the Russian government last weekend.

The $9.32bn deal value helped propel the bank into 17th position in the global mergers and acquisitions league tables from Dealogic, an investment bank information provider, this year. Last year the bank did not rank in the top 20.