US Treasury yields advanced across the board following news of an agreement with Iran, which led investors to scale back their expectations for Federal Reserve interest rate hikes.

Yields on Treasuries of all maturities declined, with the sharpest drops seen in short-term bonds, which are most sensitive to shifts in monetary policy. Traders in the swaps market now see roughly a 60% chance of the Fed implementing a 25-basis-point rate hike by December, down from approximately 80% last Friday. Brent crude oil prices fell by about 4%, alleviating some market concerns over inflation.

The rise in Treasury prices was driven by investor optimism that a resolution to tensions with Iran could help reopen the Strait of Hormuz and reduce oil prices. The implications of this market move extend far beyond the $31 trillion US Treasury market, as US bonds serve as the global benchmark for borrowing costs, influencing a wide range of assets from corporate debt to emerging market securities.

"Some short positions in interest rate products will be unwound," said Matthew Haupt, a hedge fund manager at Wilson Asset Management. "Central banks can now afford to be less hawkish, as they can wait and look through any short-term inflationary pressures."

The yield on the 2-year Treasury note fell by 6 basis points to 4.02%. The benchmark 10-year yield saw a similar decline, dropping to 4.42%. The 30-year yield decreased by 4 basis points to 4.92%, marking its lowest level since May 7th.