30-Year Treasury Yield Near Multiyear Highs
30-year Treasury yield hit multiyear highs after Brent topped $90 and a U.S.-Iran ceasefire lapsed, spurring a global bond selloff and lifting funding costs.
KEY TAKEAWAYS
- 30-year Treasury yield rose to about 5.3%, its highest level since 2007.
- Brent crude topped $90 per barrel, rekindling inflation fears and lifting term premiums.
- U.S.-Iran ceasefire expiry and Strait of Hormuz incidents prompted a coordinated global bond selloff.
HIGH POTENTIAL TRADES SENT DIRECTLY TO YOUR INBOX
Add your email to receive our free daily newsletter. No spam, unsubscribe anytime.
The 30-year Treasury yield climbed to multiyear highs as global bond markets sold off on August 17–18, 2026, after Brent crude rose above $90 and the U.S.–Iran ceasefire expired. Investors demanded higher compensation for inflation and geopolitical risk amid rising oil prices and renewed Middle East tensions.
Long-End Yields Rise Globally
The 30-year Treasury yield reached about 5.3%, its highest level since 2007. The 10-year yield approached 4.7%, nearing its 2007 peak, while the 20-year hit a post-2006 high. A recent 30-year Treasury auction "stopped" near 5.2%, the highest yield at that sale in 25 years.
Long-dated sovereign yields abroad rose in tandem. French 10-year OATs traded near 4.1%, their highest since 2009, and French 30-year yields hit levels not seen since 2008. German 30-year Bunds climbed to about 3.8%, a 15-year high. U.K. 30-year gilts traded near 5.9%, and Japanese government bond yields approached 2.9%, the highest in roughly three decades.
Geopolitical Tensions and Inflation Pressure
The expiration of a 60-day U.S.–Iran ceasefire without extension triggered a shift in risk sentiment. Iranian officials warned of adopting a "fully offensive" military posture, while incidents in the Strait of Hormuz, including a cargo vessel struck by a projectile, heightened oil-supply risk premiums.
Brent crude traded above $90 per barrel, around $91 in recent sessions, while West Texas Intermediate held near $84.5. Oil rose for a third consecutive day, with Monday’s gain near 2.7%, reviving concerns about persistent headline inflation.
Market participants also cited large U.S. fiscal deficits and heavy sovereign debt issuance as additional pressure on bond prices. Recent long-dated Treasury auctions at historically high yields reflected increased supply amid strong demand for compensation. Stronger U.S. economic data, such as a hotter regional manufacturing survey, supported higher yields by signaling ongoing activity and limiting expectations for near-term policy easing.
These factors combined to produce a coordinated global bond selloff that rebuilt term premiums—the extra compensation investors demand for holding long-term bonds—and shifted market expectations toward a higher-for-longer interest rate environment. This repricing raises borrowing costs for heavily indebted governments and complicates funding plans strained by large deficits.
