“One important conclusion is that the probability that the S&P 500 index is currently in a bubble is only 20-33 per cent,” according to Gavyn Davies in his recent article for the Financial Times, “How to detect amarket bubble.” “But that could change fairly quickly during 2014 if the recent pace of advance in equity prices continues.”
Davies approves of the New
Palgrave definition of a financial bubble:
Bubbles are typically associated with dramatic asset price increases followed by a collapse. Bubbles arise if the price exceeds the asset’s fundamental value. This can occur if investors hold the asset because they believe that they can sell it at a higher price to some other investor even though the asset’s price exceeds its fundamental value.
Davies then mentions two other bubble detectors:
Based on the Shiller cyclically adjusted p/e (CAPE), the probability of a bubble is estimated at 33 per cent in December 2013, while the price/dividend model produces a bubble probability of 20 per cent.
