Low interest rates and asset purchases by central banks may have contributed to the build-up of asset bubbles in advanced economies, the IMF warns in its upcoming World Economic Outlook report.

While "some of the asset price bubbles and credit booms that underlay the large imbalances in many advanced economies up to about 2006" have been corrected, the IMF notes, "others may have emerged, including because of the expansionary policies that the crisis has engendered".

In a chapter on global