Exclusive: Nasdaq to tighten listing rules, restricting Chinese IPOs - sources

NEW YORK (Reuters) - Nasdaq Inc is set to unveil new restrictions on initial public offerings (IPOs), a move that will make it more difficult for some Chinese companies to debut on its stock exchange, people familiar with the matter said on Monday.While Nasdaq will not cite Chinese companies specifically in the changes, the move is being driven largely by concerns about some of the Chinese IPO hopefuls' lack of accounting transparency and close ties to powerful insiders, the sources said.At a..