美国财政部拍卖四周期国债，得标利率4.225%（5月1日报4.240%），投标倍数2.82（前次为2.74）。拍卖八周期国债，得标利率4.225%（5月1日报4.220%），投标倍数2.98（前次为3.28）。

Group 1 - The U.S. Treasury auctioned four-week and eight-week Treasury bills with a winning yield of 4.225% for both, showing a slight increase from the previous auction yields of 4.240% and 4.220% respectively [1] - The bid-to-cover ratio for the four-week Treasury bills was 2.82, an increase from the previous ratio of 2.74, indicating stronger demand [1] - The bid-to-cover ratio for the eight-week Treasury bills was 2.98, down from the previous ratio of 3.28, suggesting a decrease in demand compared to the last auction [1]