The South Korean electronics giant secured regulatory approval for its updated draft red herring prospectus on Thursday and is expected to file the final version early next week, sources told Bloomberg. The revised valuation places the company at roughly $9 billion, down from the earlier projection when the IPO papers were first filed in December.Third billion-dollar IPO this yearThis would mark the third billion-dollar IPO after HDB Financial Services and Hexaware Technologies in a year that has already se ...