Short squeeze: What exactly is going on at GameStop?

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

European shares extend rally as insurance and travel stocks soar

Markets report: Improving economic data boosts stocks on Wall Street

Sony shares rise after Loeb pressure spurs it to sell Olympus stake

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

Sony cut full-year revenue outlook on slower-than-anticipated sales

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

Europe rallies as Italy winds up failed banks

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

Sony to buy Britain’s CSC media group in TV network push

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

Hertz to correct results for past three years, shares plunge

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

Dow Chemical chief rejects call for break-up

Company reported earnings well above analysts’ expectations

Nokia shareholders to vote on Microsoft deal

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

Bringing home the Bacon: triptych sells for record $142.4m

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

Sony issues profit warning after failed attempt to reverse fortunes

Planet Business

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

Stocktake

Shiller knows best on S&P valuation

Heated Hollywood: Clooney versus the ‘carpet bagger’

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