In the economic environment that has been emerging over the last couple of decades, it is more likely that the occasional build-up of financial imbalances, typically in the form of unsustainable credit and asset price booms, will occur against the background of low and stable inflation, posing a potential threat to financial and macroeconomic stability. This means that the scope for monetary policy to lean against the build-up may be more constrained than in the past when those imbalances would normally develop alongside rising inflation. This puts a premium on a strengthening of the macroprudential orientation of prudential frameworks, designed to restrain the build-up of imbalances and to make the financial system better able to withstand their unwinding. In this paper, we review the progress made in this direction in recent years. We conclude that there is now a much keener awareness of the importance of a macroprudential orientation but that progress in making it operational, while considerable, has been slower. The main obstacles are of an analytical and, above all, institutional/political economy nature. We suggest ways in which these obstacles could be addressed and underline the potential complementary role that adjustments in monetary policy frameworks could play.

It has long been recognized that there is a strong complementarity between monetary and prudential policies. A sound financial system is a prerequisite for an effective monetary policy; just as a sound monetary environment is a prerequisite for an effective prudential policy. A weak financial system undermines the efficacy of monetary policy measures and can overburden the monetary authorities; a disorderly monetary environment can easily trigger financial instability and render void the efforts of prudential authorities. Economic history attests to this, as illustrated by the anatomy and consequences of the financial crises that have affected the industrialized and developing world, going back to previous centuries. So much is agreed. What is more contentious is the view that some fundamental changes in the economic environment over the last quarter of a century may actually have tightened the interdependence between monetary and prudential policies, potentially calling for significant refinements in policy frameworks. In some research at the BIS in recent years we have been exploring this possibility in some detail.