The accounting rulemakers said they are seeking more feedback about whether groups of companies could phase in IFRS and how investors are dealing with the two sets of accounting rules currently existing in the United States. Emily Chasen at WSJ CFO Report writes [trial subscription required] that accounting rulemakers in the U.S. and abroad are calling for collaboration even as U.S. regulators have so far refused to take a clear position on whether they should adopt international accounting rules. But that lack of guidance makes the timing and nature of such cooperation uncertain, the heads of the U.S. and international accounting…