In late October more than 40 of Europe's most powerful bankers convened at the palatial Dolder Grand hotel overlooking Zurich for three days of discussions about the state of their industry.

Attendees were given the chance to quiz Switzerland's finance minister, Karin Keller-Sutter, and central bank governor Thomas Jordan, just over six months after the pair played key roles in the rescue of Credit Suisse by its rival UBS.