In other news
Sharp drops in many of the stocks owned by Buffett's Berkshire Hathaway in recent weeks have hit the sprawling conglomerate's equity portfolio hard.
Lloyds Banking Group will next week announce plans to cut 9 000 jobs over the next
three years, according to sources.
Britain's biggest grocer Tesco has reported a larger than expected hole in its accounts, forcing it to scrap its full-year trading profit outlook.
A glitch in Apple's new mobile payment system, Apple Pay, has caused some Bank of America customers to get charged twice for a single transaction.
South African stocks have retreated, led by platinum producers that were hit by data showing a sharp fall in Chinese imports of the precious metal.
US stocks have slipped following mixed earnings as the market retreated after three straight sessions of big gains.
Asian markets have fallen on profit-taking after the previous day's hefty gains, but losses were limited after a slight pick-up in Chinese manufacturing activity.
Oil prices have tanked further in Asian trade as a crude supply glut overshadowed news that China's key manufacturing sector picked up slightly, analysts said.