美国财政部拍卖四周期国债，得标利率4.060%（6月12日报4.080%），投标倍数3.15（前次为3.22）。拍卖八周期国债，得标利率4.470%（6月12日报4.380%），投标倍数2.70（前次为2.67）。美国周四将休市，拍卖活动较以往提前一天进行。

Group 1 - The U.S. Treasury auctioned four-week and eight-week Treasury bills with a winning yield of 4.060% and 4.470% respectively, showing a slight decrease from the previous auction rates of 4.080% and 4.380% [1] - The bid-to-cover ratio for the four-week bills was 3.15, down from 3.22 in the last auction, while the eight-week bills had a bid-to-cover ratio of 2.70, slightly up from 2.67 previously [1] - The auction activity was conducted a day earlier than usual due to the market closure on Thursday [1]