President of Spanish wifi company Gowex, Jenaro Garcia, who announced on Twitter last week that the company’s accounts had been falsified for more than four years. Photograph: Angel Diaz/EPA

To many, attempting to profit from stock market falls is immoral and parasitic. Short sellers, however, see themselves as the detectives of the stock (...)

Work it out for yourself – is it a maze or a hedge fund?

The Kiss approach – keep it simple, stupid – has merit in many fields, not least in that of investment, where complexity and seemingly sophisti(...)

 Number crunching: mechanical models to predict stock market performance have shown to be consistently better than expert opinion. Photographer: Jin Lee/Bloomberg

Simple computer models invariably trump expert human judgment, whether predicting wine prices, making medical diagnoses, analysing job performa(...)

Stock picking: Investors often buy into a story, and forget to look for evidence to back up their assumptions.

Most of us are “predictably irrational”, to quote behavioural finance author Dan Ariely, relying all too often on a dodgy sense of intuition an(...)

Traders on the floor of the New York Stock Exchange: When an investment fails, we curse our bad luck. When it’s a winner, we attribute it to skill. photograph: brendan mcdermid/reuters

Psychologist Daniel Kahneman’s insights into dodgy decision-making and human irrationality helped revolutionise economic thinking, replacing th(...)

European earnings continue to lag the US, where 62 per cent of companies have beaten estimates – one of the highest percentages of the last thr(...)

Pullback, correction or bear market? Market selling unnerved investors, who just weeks ago were assuming another year of strong gains. Japan’s (...)

Taking stock: investors should establish if a banking relationship exists between an analyst and the company being assessed. photograph: spencer platt/getty images

There’s an old Wall Street joke that you don’t need analysts in a bull market and you don’t want them in a bear market – a sentiment many Irish invest(...)

A bad day at the New York Stock Exchange last week.  photograph: lucas jackson/reuters

Investors looking for decent returns are always being told what they should and should not do. But what about the forgotten rebels out there who want (...)