Aston Martin plans to go public as turnaround picks up speed

LONDON (Reuters) - Luxury carmaker Aston Martin plans to float on the London Stock Exchange, completing a turnaround for the once perennially loss-making company that could now be valued at up to 5 billion pounds ($6.4 billion). The 105-year old firm, famed for making the sports car driven by fictional secret agent James Bond, would become the first British carmaker to list in London for years, following the sale of brands such as Jaguar and Bentley to foreign owners. The initial public offering..