美国财政部拍卖580亿美元三年期国债，得标利率3.891%，投标倍数2.51。

Group 1 - The U.S. Treasury auctioned $58 billion of three-year notes with a winning yield of 3.891% [1] - The bid-to-cover ratio for the auction was 2.51, indicating strong demand for the securities [1]