United States - 4-Week Treasury Bill Secondary Market Rate was 5.28% in April of 2024, according to the United States Federal Reserve. Historically, United States - 4-Week Treasury Bill Secondary Market Rate reached a record high of 5.78 in May of 2023 and a record low of -0.04 in March of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - 4-Week Treasury Bill Secondary Market Rate - last updated from the United States Federal Reserve on April of 2024.