Global bond yields fall as U.S.-Iran deal hopes drive risk-on shift

Investors piled into risk assets and dumped safe havens as conflicting signals from Washington and Tehran gave way to cautious optimism that a U.S.-Iran peace framework could be finalized within days.

Global bond yields tumbled and the dollar slipped Monday as markets priced in progress toward a U.S.-Iran peace deal, with President Trump announcing that Israel and Hezbollah had agreed to stop fighting.

"Any new signs of setbacks in the diplomatic process are likely to be met with market volatility and could fuel demand for the dollar, particularly given the potential implications for energy markets, inflation expectations, and broader risk sentiment," Paolo Broccardo, chief executive at BankPro, said in a note.

The 10-year U.S. Treasury yield fell 4.2 basis points to 4.435%, while the 30-year yield slipped 3.8 basis points to 4.953%, according to Tradeweb. European bonds followed: the 10-year German Bund yield dropped 5.6 basis points to 2.953%, and the 10-year UK gilt yield fell 5.8 basis points to 4.841%. The DXY dollar index edged down 0.1% to 99.133.

The Strait of Hormuz handles about a fifth of global oil and liquefied natural gas flows, and its effective closure since February has pushed Brent crude above $94 a barrel and fueled inflation globally. A reopening would remove the single biggest supply-side shock to the world economy since Russia's invasion of Ukraine, potentially cooling price pressures and reshaping central bank rate paths.

Oil Prices and the Diplomatic Tightrope

Brent crude futures lost 53 cents to $94.45 a barrel, while U.S. West Texas Intermediate fell 56 cents to $91.60, extending a monthly loss of more than 16 percent in May on hopes of a peace deal. Yet the path to an agreement remains uncertain. Trump said Monday that talks with Iran were continuing, but Iranian state media reported that Tehran had suspended indirect negotiations with Washington. The White House later dismissed an Iranian state television report on a draft interim peace deal as "a complete fabrication."

The last time a major Middle East conflict threatened global energy flows — Iraq's invasion of Kuwait in 1990 — oil prices doubled within three months and the S&P 500 fell 17 percent before a U.S.-led military response stabilized markets. Today's dynamic is different: the conflict itself is between the U.S. and Iran, making the diplomatic off-ramp both more direct and more politically fraught.

Rate Path Uncertainty Complicates the Bond Trade

Front-end U.S. Treasury yields are pricing the risk of a renewed Federal Reserve hiking cycle, analysts at Variant Perception said in a note. The majority of historic energy shocks lead to lower yields over time as the supply shock hurts growth eventually, they said, but today's two-year yields are trading more like the 2022 pattern than a typical energy shock.

The tension is acute: a peace deal that crashes oil prices would ease inflation and open the door for rate cuts, while a breakdown that sends crude back above $100 a barrel would force the Fed to choose between fighting inflation and supporting growth. OIS markets are currently pricing a 62 percent probability that the Fed holds rates steady at its next meeting, according to data compiled by Bloomberg.

This article is for informational purposes only and does not constitute investment advice.