Some five years on from the Autumn 2008 collapse of Lehmans, the regulatory dust from the Global Financial Crisis has settled. Significant regulatory policy debates are still underway internationally, notably with respect to the treatment of shadow banking.1 But the main contours of the crisis-era regulatory landscape are now clear. Internationally, most major economies, including the EU, have implemented the G20 reform agenda, set out initially in the 2008 Washington Declaration,2 and covering, inter alia: bank capital, liquidity and leverage; hedge funds; rating agencies; and the over-the-counter (OTC) derivatives markets. That major regulatory change would have followed the financial crisis is not, of course, a surprise.3 Observation of responses to major financial crises over the years from the 1929 Crash to the ‘dotcom bubble’ era and beyond4 makes clear that what Professor Coffee has vividly described as the ‘regulatory sine curve’5 leads to a regulatory boom after financial market bust.