China has halted intervention in the stock market so far this week as policy makers debate the merits of an unprecedented government campaign to prop up share prices, according to people familiar with the situation. Some officials argue that falling stocks will have a limited impact on the world’s second-largest economy and that the costs of supporting the market are too high, said one of the people, who asked not to be identified because the deliberations are private. Officials who back intervention say tumbling shares pose a risk to the banking system, the people said. The Shanghai Composite Index sank 15 percent ... (full story)