美国财政部拍卖三个月期国债，得标利率4.235%，投标倍数3.21。

Core Viewpoint - The U.S. Treasury Department auctioned three-month Treasury bills with a winning yield of 4.235% and a bid-to-cover ratio of 3.21 [1] Summary by Categories Auction Details - The three-month Treasury bills were auctioned with a winning yield of 4.235% [1] - The bid-to-cover ratio for the auction was recorded at 3.21, indicating strong demand for the securities [1]