Amateur traders, hedge funds and Wall St all driven by different priorities

Markets report: Improving economic data boosts stocks on Wall Street

Stock jumps more than 2% on news of €688m sale of medical equipment maker

Company is predicting annual operating profit to drop for the first time in three years

Iseq closes up 0.14 per cent as AIB heads to the top of the class

Chief executive Kazuo Hirai has pledged to strengthen its US-based entertainment business

News of accounting errors originating in 2011 drives shares down as much as 12 per cent

Company reported earnings well above analysts’ expectations

Communucations giant agreed to sell its devices and services business for €5.44bn

1969 piece raises bar and becomes most expensive work ever sold at auction

This week: Plastic moons, creative differences and auction house activism

Shiller knows best on S&P valuation

The actor has come to the defence of Sony after Wall Street wolf Daniel Loeb criticised the poor box-office of recent blockbusters