By Ali Lyon FTSE 250 asset manager Jupiter is set to keep nearly £500m of the funds run by the departing fund manager Ben Whitmore. The move will be greeted as a boost to the large asset manager, which has been facing a wave of withdrawals from Whitmore’s Jupiter Global Value fund, after the stockpicker’s exit was announced at the start of the year. Jupiter told the Financial Times: “The Jupiter Merlin team retains its full investment of £480m in the Jupiter Global Value… under new lead portfolio manager Brian McCormick.” The fund sits in Jupiter’s Merlin range, which operates at a degree of s…