That compares with a 5.2 percent increase in the yield investors demand to own high-yield bonds rather than US Treasury notes, according to an index of 892 issuers compiled by Merrill Lynch &Co.

• 相比之下，其收益增长了5.；2%25，说明投资者需求高收益债券而不是美国长期债券，该数据来自美林证券公司对892家公司的调查。