美国至7月29日6周国债竞拍-得标利率 4.27%，前值4.26%。

Core Insights - The auction yield for the 6-week U.S. Treasury bills as of July 29 was 4.27%, slightly up from the previous value of 4.26% [1] Group 1 - The increase in the auction yield indicates a slight rise in borrowing costs for the government [1]