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John Plender on Bubbles

Bubbles will be clearer as central banks start to normalise policy
John Plender, FT 21 July 2015

For unreconstructed efficient market theorists, bubbles do not exist. 

For semi-reconstructed ones, they exist but, as former Federal Reserve chairman Alan Greenspan claimed in the late 1990s, they are perceptible only after the fact. To spot a bubble in advance, he declared, requires a judgment that hundreds of thousands of informed investors have it all wrong.

Given that many spotted the dotcom bubble in advance and identified the property bubble before the credit crunch of 2007, the semi-reconstructed position seems almost as eccentric as the out-and-out efficient market stance. 

The eccentricity is further underlined by the fact that 2015 has witnessed two of the most readily detected bubbles in history.

Full text

John Plender at IntCom

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