US Treasuries experienced a drop as trading resumed after a US public holiday, with US 10-year yields rising by three basis points, after having climbed as much as five basis points earlier. This movement bucked a broader market rally as oil prices declined, following Iran's announcement of "major progress" in all-night discussions with the US. The initial decline in Treasuries was attributed to renewed inflation concerns stemming from President Trump's threats of military action against Iran, specifically targeting Iranian energy infrastructure and raising fears over the Strait of Hormuz, a crucial shipping lane for about a fifth of the world's oil supply.

Throughout the April to June 2026 period, Treasury yields have demonstrated volatility, falling when oil prices spiked due to geopolitical threats and then finding some recovery when ceasefire signals emerged. This illustrates the tight linkage between these markets and diplomatic developments rather than purely economic fundamentals. The US Treasury also recently seized approximately $1 billion in Iranian-linked digital assets by late May 2026, highlighting how geopolitical conflict can impact the crypto ecosystem, creating dual risks of macro-driven price volatility and regulatory challenges.

Amidst these developments, talks between the US and Iran in Switzerland led to significant progress, with Iran indicating success in all-night discussions. This positive diplomatic news contributed to oil prices falling, with Brent crude dropping below $79 a barrel and Brent North Sea Crude down 4.1 percent at $77.27 a barrel, while West Texas Intermediate was down 3.4 percent at $73.30 a barrel. The US also temporarily lifted sanctions on Iran to allow crude oil exports through August 21, further easing oil supply concerns and contributing to the recovery of Treasuries from their earlier losses.