The present financial crisis may be added to a growing list of episodes worldwide in which financial sector problems have become systemic in nature. Many OECD countries have been affected, either directly or through the transmission of problems cross-border. Most financial crises share a number of common elements.

For instance, financial innovation has often played a role in distress episodes, in many cases, having much to do with their idiosyncratic aspects. For example, structured credit products and the latest incarnation of the originate-and-distribute model of intermediation have been at the epicentre of the current crisis. It differs from other crisis episodes in having a sub-component of the residential mortgage sector as its trigger, while previous crises have more often been prompted by problems in the commercial mortgage market and with corporate clients.