As China firms walk out on Wall St., spurned investors demand payback

``In deals collectively worth $40 billion, some 33 mainland China companies have unveiled plans this year to be taken private and delisted from the Unites States, according to Thomson Reuters data. But a cottage industry of hedge funds and lawyers is coalescing around those determined not to accept low-ball bids for their assets... "Investors will shun Chinese IPOs (in the United States) in the future. It just reinforces the negative perception" said John Romero, a Birmingham, Alabama-based hedge fund manager who has told the board of Renren Inc. the buyout offer for the social networking company undervalues it by 60 percent.''