<sod >The UKâs blue chip share index jumped 1.3 per cent shortly after the stock marketÂ opened and was trading around 0.8 per cent higher by late morning.< eod>< sod > The UKâs blue chip share index jumped 1.3 per cent shortly after the stock market opened and closed 1 per cent higher at 7,527.33.Â  Many of the companies on the index are internationally focused and so receive a profit boost when their overseas revenues are converted into the weakened pound.< eod>