美国财政部拍卖六周期国债，得标利率4.180%（6月10日为4.195%），投标倍数2.78（前次报3.32）。

Group 1 - The U.S. Treasury auctioned six-month Treasury bills with a winning yield of 4.180%, slightly down from 4.195% on June 10 [1] - The bid-to-cover ratio was 2.78, indicating a decrease from the previous auction's ratio of 3.32 [1]