美国财政部拍卖52周期国债，得标利率3.930%（4月15日报3.820%），投标倍数3.31（前次为2.94）。

Group 1 - The U.S. Treasury auctioned 52-week Treasury bills with a winning yield of 3.930%, an increase from the previous rate of 3.820% reported on April 15 [1] - The bid-to-cover ratio was 3.31, which is higher than the previous ratio of 2.94, indicating stronger demand for the auctioned securities [1]