Robert Shiller’s recent New York Times piece on the “mystery of lofty stock market elevations” does not impress bulls. Photograph: Jessica Hill/AP

Irrational exuberance is back, says Shiller

Geopolitical tensions have catalysed a flight from risk

George Soros:  “To others, being wrong is a source of shame; to me, recognising my mistakes is a source of pride. Once we realise that imperfect understanding is the human condition, there is no shame in being wrong, only in failing to correct our mistakes.” Photograph: Brendan Smialowski/ AFP/Getty Images)

As the most successful hedge fund manager in history turns 84, what lessons can he offer?

New York Stock Exchange traders: We are, according to one finance professor, biologically predisposed to screw up in our investment choices. Photograph: Brendan McDermid/Reuters

Biology is not destiny, but research indicates our genes play a large part in our investment approach.

Report by London Business School says investors' return would have been half that of FTSE

A man walks past a newspaper kiosk advertising Spanish wireless network provider Gowex in Madrid. Photograph:  Andrea Comas/Reuters

Short-selling outfit claims to be motivated by Batman-like desire for corporate justice

Investors shrug off $8.9bn fine

Twitter shares lost a quarter of their value following its last earnings report in May, despite beating estimates. It is not an isolated phenomenon – young glamour stocks are often priced to perfection, putting them under pressure to live up to unrealistic expectations. Photograph: Brendan McDermid/Reuters

With US earnings season about to start, it is no harm to learn how to decipher statements

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