We have a problem.” This was the call Francesco Papadia, European Central Bank’s market desk head in Frankfurt, made at 7.30 am on August 9, 2007 to his boss, European Central Bank president Jean-Claude Trichet, who was at the time on vacation at his family home in Saint-Malo on the coast of Brittany. The near-crippling downturn of the global financial system that unfolded over the next five years is by now well known.