美国财政部拍卖六周期国债，得标利率4.235%（4月29日为4.230%），投标倍数2.91（前次报3.14）。

Core Insights - The U.S. Treasury Department auctioned six-month Treasury bills with a winning yield of 4.235%, slightly up from 4.230% on April 29 [1] - The bid-to-cover ratio was 2.91, indicating a decrease from the previous auction's ratio of 3.14, suggesting lower demand [1]