The U.S. Securities and Exchange Commission's bid to force companies to disclose more details about their share buyback plans was cut down by a federal appeals court on Tuesday after the agency failed to meet the court's deadline to fix what the judges had called "defects" in the requirement. The ruling is a win for the U.S. Chamber of Commerce, the top business lobbying group that had sued to block the rule adopted earlier this year by the SEC on a 3-2 vote. Judges for the U.S. Fifth Circuit Court of Appeals in October had given the SEC 30 days to "correct defects i...