Hao Ting, who owns a petroleum-equipment business in Beijing, recalls the investment sales pitch from her private banker in Hong Kong at Singapore's DBS Bank: "The world is made for wealthy people. The more wealth you have, the easier it is to make money." Today she's out $10 million and owes the bank another $12 million. Hao and the bank are now suing each other in Hong Kong, with the bank saying it followed "local regulatory guidelines."