The Rial That Did Not Rally: Inside Iran's Currency Collapse Despite the Hormuz Thaw

At 11:04 UTC on 28 June 2026, Iranian affairs analysts monitoring the rial flagged a number that diplomats in Muscat, Doha and Geneva had not expected to see. Less than two weeks after Tehran and Washington signed a memorandum of understanding and Iran reopened the Strait of Hormuz to commercial traffic, the Iranian currency had lost roughly 13% of its value, according to a tally circulated by the English-language Iranian outlet Abuali Express and its companion channel englishabuali. The memo, the reopening, the carefully staged images of tankers moving through the strait — none of it had arrested the slide.

The story of the past fortnight is not that diplomacy failed. The memorandum exists; commercial shipping has resumed, and the United Nations is working to restart evacuations from Hormuz-adjacent facilities after earlier Iranian attacks halted the effort. The story is that a serious political event — the kind that ordinarily anchors an emerging-market currency — barely registered. Markets had been told to expect relief. They got a 13% loss instead. The gap between the diplomatic script and the price action is the news.

What the wires say happened

The sequence, as far as the available reporting establishes it, runs in three movements. First, a memorandum of understanding between the United States and Iran, the contents of which the source material does not detail, was concluded in mid-June. Second, Iran reopened the Strait of Hormuz to commercial shipping. Third, despite both steps, the rial weakened by approximately 13% over the subsequent two weeks, per the figure cited on 28 June 2026 by englishabuali (11:04 UTC) and corroborated the same morning by Abuali Express (10:10 UTC).

Two other datapoints frame the period. On 27 June 2026 at 01:42 UTC, a brief from Polymarket-tracked regional reporting indicated that the United Arab Emirates had held a rare direct call with Iran stressing the need to protect freedom of navigation through the strait. A day earlier, on 26 June 2026 at 19:01 UTC, a UN spokesperson said the organisation was working to restart Hormuz evacuations after Iranian attacks had halted the effort. The combination is telling: a maritime route officially reopened, foreign ministers phoning each other directly, the UN rebuilding evacuation logistics — and yet the rial still fell.

The 13% figure is consistent across two affiliated Iranian-diaspora outlets reporting the same morning. It should be read as an indicative retail-rate or bazaar-rate measurement rather than a central-bank reference rate. The Iranian rial trades across multiple tiers, and any number circulating outside an official Central Bank of Iran statement carries that caveat. But the direction of the move — and the fact that it occurred across two independent morning reports — is the load-bearing claim.

Why a deal-on-paper did not move the market

The simplest explanation for a currency that weakens after a positive shock is that the shock was not, in fact, what traders were waiting for. The memorandum of understanding, by its nature, is a non-binding framework — a commitment to negotiate, not a binding agreement. Secondary sanctions architecture, including the financial-sector designations that operate through correspondent-banking choke points, was not visibly altered. Without changes to those mechanisms, the offshore supply of hard currency through formal channels remains throttled.

A second explanation sits closer to the demand side. Iran's import bill — for refined petroleum products, for staple goods, for industrial inputs — is denominated in dollars, euros, dirhams and yuan. A diplomatic event that does not alter the import financing pipeline does not change the behaviour of importers rushing to bid up hard currency at the margin. If anything, the announcement of a prospect of relief can accelerate pre-positioning by importers who have been waiting for a window to stock up, temporarily increasing demand for foreign exchange at exactly the moment the formal market expects supply.

A third explanation involves capital controls. Even if the central bank had been willing to defend the rial using reserves, the available firepower to do so without breaching the memorandum's spirit is limited. Defending a 13% move over two weeks would have required steady, very visible intervention. None was reported in the source material.

None of these explanations are mutually exclusive. They point in the same direction: the relief that markets price is relief from the underlying sanction architecture, not from the announcement of intent to negotiate. The two have very different weights.

The structural frame: sanctions, oil, and the price of trust

Currency markets do not price diplomatic atmospherics. They price the present value of expected future dollar inflows. Iran's dollar inflows are a function of three things: oil and gas export receipts, the unfreezing of restricted funds held abroad, and the willingness of foreign banks to process Iranian-origin transactions without fear of secondary exposure. A memorandum leaves all three largely untouched.

The strait's reopening matters more. Hormuz handles a share of seaborne oil flows that, on any given week, can swing global benchmarks. But the reopening is itself ambiguous in its market effect. More shipping through a stable strait is, on paper, bullish for Iranian revenues. It is simultaneously a signal that Iran's leverage has been spent — that the choke-point threat that justified a risk premium in Iranian assets has been removed. Premiums that disappear do not lift the underlying asset; they compress it.

Then there is the question of trust. The diplomatic reporting available in this thread is a snapshot, not a chronology. It captures a UAE call on 27 June and a UN evacuation-restart announcement on 26 June. It does not establish a continuous negotiating track, an agreed sanctions waiver, or any mechanism for verifying Iranian compliance with the spirit of the memorandum. In a market that has watched previous agreements fray, ambiguity is a tax.

The structural point is plain. The architecture of pressure on Iran's economy runs through the dollar system — through correspondent banks, through SWIFT alternatives, through the willingness of Asian refiners to accept the political risk of discounted crude. A deal that does not engage that architecture, however photogenic, does not move the rial.

Counterpoint: what the sceptics of the 13% figure will say

The 13% figure warrants caution. It is sourced from Iranian-diaspora outlets with an editorial line that has historically been critical of the Islamic Republic, and the figure is reported in informal social media formats rather than as a Central Bank of Iran or IMF datapoint. A sceptical reader will note three things.

First, Iran's official reference rate and the bazaar rate have diverged sharply in past episodes, sometimes by orders of magnitude. A 13% move on a non-reference indicator is not the same as a 13% move on the official rate. Second, the reporting window — "less than two weeks" — is short. Currency crises frequently show two-week moves that subsequently retrace once the initial shock is digested. Third, no independent wire confirmation of the 13% figure appears in the source material the desk has on hand. The figure should be treated as an indicative signal from one corner of the Iranian information ecosystem, not as an audited number.

That said, the direction of the move is harder to dismiss. Two affiliated outlets reported the same direction the same morning, both describing a sharp weakening rather than a sharp strengthening. Even with the caveats, a post-memorandum rial slide is the analytically interesting fact, not its precise magnitude.

The regional ripple

The UAE's 27 June call is worth pausing on. UAE-Iran direct communications have historically been episodic, conducted through back-channels and concentrated around specific incidents — the 2019 tanker disputes, drone incidents, prisoner-swap arrangements. A public, named-call framing, on the record from the Emirati side, marks a diplomatic posture that is not routine.

The UAE is not a neutral actor in the Hormuz question. Its ports — Fujairah in particular — sit outside the strait and have benefited commercially from periods of Hormuz tension, as shippers reroute to off-strait loading. A reopening of Hormuz is, on the margin, an economic negative for Fujairah and adjacent logistics infrastructure. The Emirati call therefore carries an unusual structural weight: a state that benefits from closure publicly calling for navigation protection is, in effect, endorsing the diplomatic settlement over its own short-term commercial interest.

For Iran, the diplomatic gain is reputational and political. The financial gain is, so far, negligible. The distinction will continue to define the rial's trajectory as long as the memorandum remains a memorandum.

What remains uncertain

Three things are not pinned down by the available source material. The text and scope of the US-Iran memorandum itself are not in the public reporting the desk has on hand. The state of Iran's central bank reserves — including any post-memorandum movement in frozen assets abroad — is not addressed by the source items. And the operational status of the UN Hormuz evacuation effort, beyond the 26 June restart announcement, is not updated.

For each of these, the next seventy-two hours will tell. If the memorandum is followed by a visible sanctions waiver — even a narrow one covering a specific sector — the rial narrative will move. If it is not, the slide reported on 28 June will look less like a one-day shock and more like the start of a trend. The market is, for the moment, voting with the second hypothesis.

Stakes

The winners and losers in the next phase are not hard to map. Tehran wins diplomatic standing and a partial stabilisation of the maritime environment, both of which have value. Tehran's importers, and the Iranian middle class holding rial-denominated savings, lose — and have been losing for the fortnight since the deal was announced. Regional Gulf states, particularly the UAE, absorb a modest commercial cost in exchange for a more predictable Hormuz. The United States retains leverage precisely because the relief delivered so far is cosmetic; the underlying architecture of financial pressure remains intact.

The currency markets are doing what currency markets do. They are reading the fine print. And the fine print, as of 28 June 2026, says very little has actually changed.

— Monexus desk note: Western wire coverage of the US-Iran memorandum has centred on the diplomatic optics — the call between ministers, the reopening photo-ops, the UN evacuation restart. This piece reads the same fortnight through the lens the rial offers: a market that was promised relief and was given a memorandum. Where wire reporting tells the story of a deal taking shape, the currency tells the story of a deal that has not yet begun.

Wire provenance

This editorial synthesis draws on the following public wire/social posts:

• https://t.me/englishabuali
• https://t.me/abualiexpress