US Treasuries sold off and oil prices jumped after President Trump threatened military action against Iran, reigniting inflation concerns that had just started to fade from investor consciousness.

Trump’s threats have targeted Iranian energy infrastructure specifically, with multiple public statements, including posts on Truth Social, signaling readiness for strikes against oil facilities. The strategic calculus centers on pressuring Iran over the Strait of Hormuz, through which roughly a fifth of the world’s oil supply passes on any given day.

During the April to June 2026 period, Treasury yields fell as oil prices spiked in response to the ongoing threats. The volatility has not been one-directional, though. Oil prices eased and Treasuries found some footing whenever ceasefire signals emerged, illustrating how tightly these markets are now tethered to diplomatic developments rather than purely economic fundamentals.

Active US-Iran hostilities began on February 28, 2026, under what the administration dubbed Operation Epic Fury. A temporary memorandum of understanding was signed around June 15-18 to halt hostilities and reopen the Strait of Hormuz, providing fleeting relief for risk assets. But the underlying tensions haven’t dissipated, and Trump has indicated willingness to renew aggression if negotiations stall.

Bitcoin’s price rose on May 23 and again on June 11-12 when positive signals emerged regarding Iranian negotiations. The pattern suggests crypto is trading more like a risk-on asset than a safe haven in this particular conflict. When tensions ease, risk appetite returns, and Bitcoin benefits.

The US Treasury seized roughly $1 billion in Iranian-linked digital assets by late May 2026. That operation underscores how deeply geopolitical conflict has penetrated the crypto ecosystem. For crypto investors, this creates a dual risk: macro-driven price volatility from the oil-inflation-Treasury transmission chain, plus regulatory and enforcement risk from sanctions compliance.

For bond investors, the key variable is whether oil price increases prove transitory or persistent. A sustained reopening of the Strait of Hormuz would relieve supply pressure and likely allow Treasury prices to recover. But Trump’s explicit warnings about renewing hostilities mean that relief could evaporate with a single statement.

The $1 billion seizure of Iranian-linked digital assets signals that regulators are actively monitoring blockchain flows for sanctions evasion. Any expansion of that enforcement, particularly if hostilities resume, could introduce compliance-driven selling pressure that has nothing to do with market fundamentals.