美国至5月20日6周国债竞拍-得标利率 4.235%，前值4.25%。

Core Insights - The auction yield for the 6-week U.S. Treasury bill as of May 20 was 4.235%, slightly down from the previous yield of 4.25% [1] Summary by Category - Auction Results - The winning yield for the 6-week Treasury bill auction was recorded at 4.235% [1] - This represents a minor decrease from the prior auction yield of 4.25% [1]