Investment banking advisers have taken a record $11bn (€9.2bn) in fees from this year's private equity and venture capital deals, almost five times the $2.7bn generated in the dotcom boom five years ago.

According to research conducted by Dealogic, buy-out firms have executed 1,100 deals this year valued at $135.7bn with single transactions breaching $10bn for the first time since 1989.