The credit crisis has provided an opportunity for mid-sized and regional banks that avoided its worst effects to take business away from the large banks that were hit hardest, according to research from consulting firm Greenwich Associates.

In a survey of 300 companies across the world taken prior to the collapse of Bear Stearns, the only two large investment banks whose reputations have been enhanced by their performance throughout the crisis are, unsurprisingly, JP Morgan and Goldman Sachs.