In other news
Europe's FTSEurofirst 300 index of top shares has slipped to a two-week low, led lower by Adidas after the group warned about business in Russia.
Kenya's statistics office says the country's inflation rate has crept up to 7%, just a touch higher than predicted.
Europe's top human rights court has awarded shareholders $2.6bn in damages, a new blow to Russia on the brink of recession.
Chinese police have seized almost 12 tonnes of yoghurt candy tainted with melamine, an industrial chemical at the centre of a scandal in which six infants died.
Aero-engine maker Rolls-Royce is on track to return to growth next year, after
profits have fallen as expected in the first half.
Asian markets have been mixed after US data showing the world's top economy grew much more than expected in the second quarter.
German airline Lufthansa says its second-quarter net profit has fallen year-on-year due to pilots strikes, excess capacity on transatlantic.
AstraZeneca has raised its sales and earnings forecasts for the year, showing
resilience after seeing off a $118bn takeover approach from rival Pfizer.