US-Iran MOU in limbo as Tehran tightens control of Hormuz—will markets price a new risk premium?

On May 24, 2026, the Institute for the Study of War (ISW) reported that the contours of a potential US–Iran memorandum of understanding (MOU) remain unresolved, with conflicting US, Iranian, and regional accounts suggesting it may not yet be a final deal. The reporting highlights that Iranian officials and the Islamic Revolutionary Guards Corps (IRGC) are still shaping the terms, leaving key details unclear. In parallel, commentary from Robert Kagan in Le Monde argues that a conflict tied to control of the Strait of Hormuz could durably weaken the United States’ global position. Separately, NZZ reports that Iran is seeking “protection money” for undersea fiber-optic cables in the Strait of Hormuz, demanding fees and exclusive rights over maintenance and repair—an action that could disrupt the Gulf’s economic connectivity. Strategically, the cluster points to a bargaining environment where diplomacy is not yet settled, while coercive leverage is being operationalized through maritime chokepoints and critical infrastructure. If an MOU is incomplete, Tehran can preserve negotiating space by raising the cost of doing business in the region, while Washington faces pressure to avoid escalation that would undermine its credibility. Kagan’s framing implies that the Hormuz dispute is not only about immediate security but also about long-term alignment and deterrence perceptions. The likely beneficiaries are actors seeking leverage over maritime and digital infrastructure flows, while the main losers are regional economies and international firms exposed to shipping, energy, and communications risk. The IRGC’s involvement in shaping the narrative suggests that any diplomatic outcome may be constrained by security imperatives rather than purely commercial considerations. Market and economic implications concentrate on energy transit risk and communications infrastructure pricing. The Strait of Hormuz is a global energy artery, so any credible tightening of control or threats to maritime operations can lift risk premia in oil-linked instruments and increase volatility in Gulf-linked shipping and insurance. Iran’s demand for fees and exclusive repair rights for undersea cables introduces a new vector of operational risk for telecom operators and data centers relying on regional connectivity, potentially raising costs for bandwidth, redundancy, and maintenance contracts. While the articles do not provide explicit price levels, the direction is toward higher perceived tail risk: energy futures and related credit spreads typically react first, followed by shipping/insurance and telecom capex planning. Investors should expect cross-asset sensitivity to any escalation language, especially if the MOU narrative shifts from “possible” to “agreed” or “collapsed.” What to watch next is whether the US and Iranian sides converge on verifiable MOU language and implementation timelines, or whether the ambiguity persists into late May and June. Trigger points include any official confirmation that maintenance and repair rights for Hormuz undersea cables are being negotiated through a legal framework rather than enforced through coercion. Another key indicator is whether IRGC-linked messaging escalates the “control” narrative around Hormuz, which would likely pressure energy and shipping risk premia even without kinetic events. On the market side, monitor implied volatility in oil and shipping proxies, as well as telecom and infrastructure-related spreads tied to regional connectivity. Finally, the ASUU item—though not clearly connected to the Iran/Hormuz thread in the provided text—signals that separate political-economic disputes can still produce headline risk; executives should therefore separate signal from noise while tracking the Iran-specific escalation/de-escalation cadence.

Geopolitical Implications

• 01

  Diplomacy is being conducted under coercive leverage: Tehran can raise regional costs while keeping MOU terms flexible.

• 02

  Control narratives around the Strait of Hormuz may translate into long-term deterrence and alliance credibility concerns for the US.

• 03

  Undersea infrastructure demands create a new domain of contestation (digital connectivity), expanding the strategic toolkit beyond kinetic threats.

Key Signals

• —Official confirmation of MOU text and implementation milestones by both Washington and Tehran
• —IRGC-linked messaging on Hormuz “control” and any references to enforcement of cable access
• —Telecom operator disclosures about cable maintenance/repair disruptions or contract renegotiations
• —Market-implied volatility moves in oil and shipping proxies tied to Middle East transit risk