The U.S. Treasury is set to auction $25 billion in 30-year bonds on August 13 at when-issued yields around 5.23% to 5.24%, which would mark the highest rate on newly issued 30-year government debt since 2001. The move follows earlier 2026 auctions that cleared at 5.046% in May and 5.058% in July, the first times 30-year yields topped 5% since 2007. Higher long-term borrowing costs reflect persistent inflation concerns and the heavy supply of government debt, as larger federal financing needs continue to pressure yields. Investors are also watching whether weaker demand for long-duration debt could eventually push the Treasury toward issuing relatively more shorter-dated notes. The auction’s bid-to-cover ratio will be closely monitored as a measure of investor appetite for locking in a 30-year commitment at current yields.