JJB.L Share News (JJB)

An 11% plunge in Tokyo this morning on fears of a nuclear catastrophe in Japan has hammered share prices in London first thing.A third explosion at the Fukushima Daiichi nuclear power plant has raised concerns of a major radiation leak. People within 30 kilometres of the plant are being told to stay indoors, while a no-fly zone has been set up around the plant to stop the radiation spreading.Only a handful of blue chips are in the blue, mainly retailers after steady results from Debenhams. Marks & Spencer and Next are the best of the bunch. Miners are taking a beating led by ENRC and Kazakhmys.Sales fell at Debenhams in the first half, though by a little less than forecast, and headline profit at the department store is expected to beat last year's effort and meet estimates. Like for like sales for the 26 weeks to 26 February fell 1.5% excluding VAT, but were flat including the tax. Royal Dutch Shell made "good progress" in 2010 and 2011 has started well, with the oil giant on track to hit its strategic targets by next year. Shell, which hosts its annual Investor Day in London today, is one year in to a three-year strategic plan and should increase cashflow from operations 2009-2012. A strong showing by the banking division was not enough to offset weaker performance in other parts of the business at merchant bank Close Brothers. Operating profit before tax in the six months to 31 January dipped to £55.8m from £61.8m the year before. Security firm G4S saw profit before interest, tax and amortisation rise 4.2% in 2010 to £527m from £506m the year before. Turnover rose 4.1% to £7.4bn from £7.1bn. Organic turnover growth was 2.1%, down from a growth rate of 3.7% in 2009.Next week could decide the fate of troubled sportswear retailer JJB Sports as it confirmed it intends to raise £65m through a new share placing but only if its landlords agree to a new company voluntary agreement (CVA).