United States - 4-Week Treasury Bill Secondary Market Rate was 0.19% in April of 2022, according to the United States Federal Reserve. Historically, United States - 4-Week Treasury Bill Secondary Market Rate reached a record high of 5.17 in February of 2007 and a record low of -0.02 in September of 2015. 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.