u/FrankKnt

I'm looking for historical price data (not yields) for U.S. Treasury bonds and notes. I need it for private analysis and backtesting, covering the past few years.

Examples of the securities I'm tracking:

• UST 4.875% (31 May 2026) – CUSIP: 91282CKS9
• UST 4.375% (30 Nov 2030) – CUSIP: 91282CJM4
• UST 4.50% (31 Dec 2031) – CUSIP: 91282CMC2
• UST 4.75% (15 Feb 2045) – CUSIP: 912810UJ5

Any recommendations for reliable datasets, APIs, or downloadable sources?