Alcoa, the biggest US aluminium producer, surprised investors on Wednesday by reporting a Q3 return to profitability after three consecutive quarters of losses, thanks to rising metal prices and cost-cuts. The results gave a positive start to the US corporate earnings season from a manufacturer that is seen as an early indicator of industrial earnings. Alcoa, which reported after markets had closed in New York, was the first company in the Dow Jones Industrial Average to announce Q3 results.
