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

Traders on the floor of the New York Stock Exchange: many market nuggets are more likely to mislead than to enlighten. Photograph: Jin Lee/Bloomberg

Folk wisdom is full of gems on supply and demand. But beware: they are based on faulty logic

Messi business: Lionel Messi of Argentina celebrates scoring his team’s winner against Iran. Academic studies have shown that there is a big difference between wins and losses, with the latter followed by an increase in heart attacks, crimes and suicides. Photograph: Ronald Martinez/Getty Images

In sport and in trade, it is all about winning and losing – and financial investments are affected by both

Winner’s curse: Apple shareholders suffered a torrid time shortly after the company smashed the market capitalisation record in August 2012, descending from a high of $705 (€520) per share to a low of $385 (€284) just seven months later. Photograph: David Paul Morris/Bloomberg

The top ranking companies in every sector go on to suffer years of underperformance, a US expert claims

Traders work on the floor of the New York Stock Exchange: Research indicates that returns are usually dictated more by chance than skill. Photograph: Justin Lane/EPA

Recent polls shows that people put good returns down to skill while bad ones are blamed on bad luck. But now there are c(...)

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