Credit Suisse (CSGN.VX) reported its first full-year loss since 2008 after booking a big impairment charge at its investment banking business, sending its share price tumbling and piling pressure on new Chief Executive Tidjane Thiam. Thiam, who took over the bank in July, said he would stick with his plan to focus more on wealth management in emerging economies and cut costs in the investment bank, despite the turbulent start to markets this year.