A group of more than 400 investors will seek KRW3.2bn ($2.7m) from the Royal Bank of Canada (RBC) and KRW100m ($86,400) from Korean firm Hanhwa Securities, alleged to have conspired to manipulate stock prices tied to derivatives, according to a class action filed in South Korea. The class action suit accuses the two companies of manipulating SK Holdings stock tied to the Hanwha Smart ELS 10 product, reduced capital returns by a quarter according to a spokesman at Hannuri Law Offices, which is a