A South Korean appeals court Thursday found US buyout fund Lone Star guilty of stock price manipulation and fined it 25 billion won ($20.9 million). The Seoul high court overturned a 2008 acquittal in the long-running case, which had stalled Lone Star's efforts to sell its 51 percent stake in Korea Exchange Bank (KEB). The court also passed a three-year prison sentence on Paul Yoo, former chief of the Texas-based fund's South Korean unit.