How to recognize an asset price bubble

May 17, 2014

A new paper from the ETH Zurich defines bubbles as episodes of unsustainable and quickening asset price growth with accelerating corrections and rebounds. In order to recognize such patterns it is critical to focus on the broader picture and correct time scale, rather than concurrent detail. Bubbles arise from innovations, valuation uncertainty and various positive feedback mechanisms that make prices spiral away from equilibrium. A critical state is often indicated by asset prices growing faster than exponentially.

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An overview of financial crisis theories

March 29, 2014

Daniel Detzer and Hansjoerg Herr deliver a superb summary of timeless economic theories of financial crisis. The main focus is on (i) escalatory inflation and deflation dynamics caused by monetary policy, (ii) boom and bust investment cycles caused by herding and inefficient expectation formation, and (iii) speculative bubbles related to cognitive behaviour that is inconsistent with efficient markets.

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Asset overvaluation and bubbles

March 9, 2013

Ever wondered why an asset or asset class maintains an implausibly high price? A new IMF paper summarizes research on “bubbles”, the phenomenon of a lasting overvaluation. It suggests, for example, that the focus on relative performance among asset managers and the presumption of informed decisions by peers causes herding. Also, limited liability of managers and leveraged institutions encourages upside risk taking. Meanwhile, sell-side research, rating agencies, and accountants often lack the incentives to pre-emptively reveal downside risks. Political and institutional aversion to short selling aggravates overvaluation bias.

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asset management Asset Purchase Program banks bond returns bond yields bubbles capital regulation carry China collateral commodities credit returns default ECB economic data EM equity returns euro area crisis Fed financial crisis FX FX interventions FX returns government debt government deficits herding inflation information insurances Japan leverage liquidity machine learning market turmoil price factors regulation risk management shadow banking statistical methods term structure trend following variance risk premium VIX volatility ZLB
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