One point eight trillion dollars. That's the daily volume running through a single clearing house in New York, and it's the reason a threat issued Monday from Washington can ground an airline halfway around the world by Wednesday.
And that's the thing Daniel's asking about. He heard Bessent say it and the phrase stuck with him.
Right, so Daniel wrote in after Treasury Secretary Scott Bessent went on CNBC on Monday. Bessent said that starting Wednesday, all Iranian airlines get shut down around the world. Not by sanctioning the airlines directly. By threatening any foreign company that fuels them, lands them, or sells tickets for them. And his exact words were, if you do any of that, you will be cut off from the dollar system.
That's the line.
Daniel says that's what caught his attention. And he wants to know three things. Why is the dollar called a system instead of just a currency? What does getting cut off from it actually mean? And why do actors like Iran go to such lengths to avoid the greenback entirely, even when their transactions don't involve a single US party?
There's a fourth one buried in there too. He mentions Iran routing cryptocurrency around the dollar, and he wants to know whether that actually works.
Yeah. So let's start with the plumbing. Because the answer to all of it is in the architecture, not the currency.
The dollar is a system because international dollar transactions don't settle directly between the two parties involved. If a Brazilian bank pays a Singaporean bank in dollars, that payment routes through a US correspondent bank. Usually through CHIPS, the Clearing House Interbank Payments System, operated by The Clearing House in New York. And final settlement runs through Fedwire, the Federal Reserve's own system.
So even a Brazil to Singapore payment, with no American anywhere in the room, touches American infrastructure.
Every time. CHIPS alone processes roughly one point eight trillion dollars a day. And the overwhelming majority of international dollar payments require CHIPS processing whether or not a US party is involved. That's the whole thing. It's a network with a single point of control.
Which is why "system" is the right word. A currency is a unit of account. A system is a set of pipes, and pipes have valves.
And the US owns the valves. That's the insight. The dollar's coercive power isn't that people want dollars. It's that clearing is centralized in New York, and you cannot complete a dollar transaction without transiting that infrastructure.
So what does "cut off" actually mean, operationally?
An OFAC designation blocks all property and interests in property of the target that are in the US or in the control of US persons. US persons are prohibited from dealing with them, and so are transactions within or transiting the United States. Non-US persons are also barred from causing a US person to violate sanctions, or from evading them.
In practice?
Loss of correspondent banking relationships. Inability to clear dollar payments. Exclusion from SWIFT messaging. And then through secondary sanctions, loss of US market access even for entities with no legal obligation to follow US rules at all.
That last part is the part that makes Bessent's threat work. A Pakistani fuel supplier has no legal duty to obey American sanctions. But if it wants to keep its dollar account, it suddenly does.
And it goes further than the formal designations. There's a phenomenon called de-risking. Third-country banks apply conservative interpretations of the rules because they're terrified of losing their own dollar access. So they cut off clients who aren't even designated. The effective scope of exclusion routinely exceeds what the paperwork says.
So the punishment is administered partly by the banks themselves, out of fear.
Which is cheaper for the US than enforcing it directly. You don't have to chase every fuel truck. You just have to make the banks nervous enough that they chase it for you.
Now here's where it gets legally interesting. Because the US can reach conduct that never touches American soil.
Currency-based jurisdiction. Sometimes called correspondent account jurisdiction. OFAC can penalize non-US parties for transactions that never enter US territory, on the sole basis that the payment moved in dollars.
Give me the example.
A Mumbai tobacco firm paid three hundred thirty-two thousand five hundred dollars for a shipment to North Korea. The shipment never went near the United States. The only US nexus was that the North Korean buyer paid in dollars, through non-US intermediaries. That was enough.
So the dollar itself is the jurisdictional hook.
The dollar is the contact point. And it's not a rounding error in the enforcement statistics. Over an eight-year dataset, January 2017 through January 2025, currency-based actions were about twenty percent of OFAC enforcement actions by count. But sixty percent of total penalties and settlements. Three point one six billion dollars.
Twenty percent of the cases, sixty percent of the money.
Currency-only cases alone were about thirty-nine percent of penalties. The largest single one in that dataset was the Binance OFAC settlement at nine hundred sixty-nine million dollars.
So if you're a compliance officer, the cases that don't involve an American are the expensive ones.
That's the counterintuitive part. The dollar-nexus cases are where the big money is, because that's where the reach is contested and the penalties have to be large enough to matter.
And there's a legal fight about whether this is even lawful.
There is. William Dodge and Patrick Terry have argued that dollar-based jurisdiction may violate customary international law. The reasoning is that clearing a transaction between foreign nationals that begins and ends outside the US is hard to characterize as a substantial effect on the United States. Dodge goes further and argues that IEEPA may not authorize the President to violate customary international law in the first place.
That's a real tension. The whole tool rests on a theory that serious people say is legally shaky.
And here's the detail I find surprising. As of May fifteenth of this year, all fifteen OFAC enforcement actions in Trump's second term rested on undisputed bases. US persons, or US territory. None of them rested solely on the dollar nexus.
So the administration had been avoiding the most aggressive version of the tool.
As of May. Which makes this week interesting, because Bessent's threat is explicitly a dollar-access threat. It's secondary sanctions. It's the return of the tool, at least rhetorically.
Let's ground it in the specific case. Mahan Air.
Designated October twelfth, 2011, under Executive Order 13224, for providing financial, material, and technological support to the IRGC. That's a fifteen-year-old designation. This isn't new.
But the enforcement has escalated.
Repeatedly. In 2019, OFAC designated UAE-based Parthia Cargo and Delta Parts Supply FZC for Mahan Air procurement. That same year there was a civil aviation advisory naming Mahan Air, Caspian Air, Meraj Air, Pouya Air, Dena Airways, and others, warning non-US persons that servicing them carried designation risk.
So the advisory was the warning shot. And this week is the shot.
The advisory told foreign carriers and ground handlers that this could happen. Bessent just told them it's happening Wednesday.
Okay. So that's the mechanism. Now the second half of Daniel's question. Why does Iran go to such lengths to avoid the greenback? Because the answer isn't just sanctions. It's that the sanctions have a compounding effect.
There's a paradox here worth naming. Every escalation accelerates de-dollarization. Russia's reserves were frozen in 2022, about three hundred billion dollars, and that was the Rubicon moment. Central banks around the world watched that and started asking whether their reserves were really theirs.
And the numbers show it.
The dollar's share of global FX reserves fell from seventy-one percent in 2000 to roughly fifty-eight percent in 2025. That's a thirteen-point decline over twenty-five years. Not a collapse. But a trend.
So the US is drawing down the very privilege that makes the sanctions work.
That's the Stratelya framing, and I think it's right. The exorbitant privilege is not a natural law. It's a contingent arrangement. And the United States is currently drawing down its privilege account faster than it's being replenished.
Which brings us to Iran's actual workaround. How big is it?
Iran's crypto ecosystem reached seven point seven eight billion dollars in 2025. That's comparable to the GDP of the Maldives or Liechtenstein.
A country-sized shadow economy running on blockchains.
And it's not diffuse. IRGC-linked addresses accounted for over fifty percent of total Iranian crypto inflows in the fourth quarter of 2025, with over three billion dollars received across the year.
So the state isn't just tolerating crypto. It's the largest user.
Iran legalized crypto mining in 2019. Licensed miners use subsidized electricity, sell the mined Bitcoin to the central bank, and the central bank transfers it to overseas counterparties to pay for imports without routing funds through US-controlled banks.
That's the elegant part. They're not buying dollars. They're mining a dollar alternative with electricity they're already subsidizing.
And the central bank has been accumulating stablecoins too. Elliptic found it took in at least five hundred seven million dollars in USDT during 2025, likely to steady the rial and finance trade. The rial has lost more than ninety-six percent of its value against the dollar.
Ninety-six percent. So the domestic currency is essentially gone as a store of value.
Which is why the crypto isn't a preference. It's a necessity. Saeed Laylaz, a Tehran political economist, put it plainly. The further the economy goes underground, the greater the need for cryptocurrencies.
But here's where Daniel's question gets its teeth. Does the crypto workaround actually work? Because I think the answer is no, and the reason is beautiful.
Go on.
The stablecoins they're using are pegged to the dollar. And the issuer can freeze them.
Tether has frozen close to four hundred seventy-five million dollars across wallets OFAC identified as belonging to the Central Bank of Iran. Three hundred forty-four million on April twenty-third of this year, across two Tron addresses. And another one hundred thirty-one million on July fourteenth.
So the escape hatch has a switch, and the switch is in the hands of a company.
At the smart-contract level. Regardless of what blockchain the tokens are sitting on. This is the structural weakness. USDT is a dollar-denominated asset with a central issuer. It's not a clean escape from the dollar system. It's a dollar system with a different front end.
They routed around the banks and ran straight into a company with a freeze function.
Bitcoin doesn't have that switch. Nobody can freeze your Bitcoin at the protocol level. But Bitcoin is volatile, it's traceable, and it's much harder to use for large trade settlements. So you're choosing between a stablecoin that can be frozen and a volatile asset that can be followed.
Neither one is sovereign money. That's the point.
And the enforcement is keeping pace. On September seventeenth, OFAC designated BitBank, a digital asset exchange controlled by the sanctioned financier Babak Zanjani, plus the developer Pishtaz Simorgh and three associates, under Operation Economic Outcast.
And Bessent's line on that was pretty direct.
"Efforts to finance the Iranian regime using cryptocurrencies are not beyond OFAC's reach. If you support the Iranian regime, the Department of the Treasury will sanction you."
That's not a subtle message.
And it's part of a bigger operation. On August twenty-fourth, Treasury launched Operation Economic Outcast. Bessent called it Economic D-Day. Nearly sixty entities, individuals, and vessels sanctioned, plus five sectoral determinations under Executive Order 13902. Including the first-ever sectoral determination covering Iran's digital assets sector.
They've now declared an entire industry as sanctionable, not just named companies.
That's the escalation. A sectoral determination means you don't have to be on a list. You just have to be in the sector.
Meanwhile the Iranians have basically stopped pretending the formal rules apply.
The Financial Times reported in early September that Iran's central bank has quietly stopped enforcing exporter repatriation rules. Traders now settle cross-border trade through domestic crypto exchanges in Tether and Bitcoin.
Quietly stopped enforcing. That's a government admitting it can't make its own exporters bring the money home.
Iran says over twenty thousand individuals and companies failed to repatriate roughly ninety-four billion dollars in undeclared export earnings. Two hundred nineteen are under investigation over twenty-three point five billion euros.
Ninety-four billion. That's not evasion at the margins. That's the economy deciding the official channel isn't worth using.
That's the part I'd flag for Daniel. The crypto workaround isn't primarily a sanctions-evasion story. It's a capital-flight story. The sanctions accelerate it, but the underlying driver is that nobody inside Iran trusts the rial.
Right. The sanctions didn't create the demand for dollars. They just made the official dollar channel unavailable, so the demand moved to dollar proxies.
Which is why the freeze power matters so much. If your whole workaround is dollar-denominated stablecoins, you haven't escaped the dollar. You've just changed who can turn you off.
Now let's talk about whether this aviation threat actually gets enforced. Because the analysts are skeptical.
Openly skeptical. Saj Ahmad at StrategicAero Research said getting all these pieces of the puzzle to do what the US demands is tricky, because places like neighboring Pakistan and China are simply not going to fold like a deck of cards on matters like this.
He's not wrong. China is Iran's largest oil customer.
Alex Vatanka at the Middle East Institute framed it as the big question. How strongly will the US insist on enforcement, and what will countries around the world decide about implementing these demands or not.
The threat is real, but the compliance is unproven. As of now, no source confirms any specific airport or fuel provider has actually been sanctioned or has complied.
The measure may be more declaratory than operational. Which is itself a story about the limits of dollar coercion. A threat only works if people believe you'll follow through, and only works twice if you actually do.
There's a cost to following through. Every time you cut a country off, you give that country and its trading partners a reason to build alternatives.
CIPS in China. mBridge. The BRICS payment discussions. None of them are close to replacing the dollar. But they don't have to be. They just have to be good enough for the transactions you've already been pushed out of.
The question isn't whether the dollar system survives. It's whether its coercive power outlasts its attractiveness as a reserve currency.
Those two things are linked in a way people don't always see. The reason the dollar is a good reserve asset is the same reason it's a good sanctions weapon. Deep, liquid, centralized, rule-bound. And the weaponization is what erodes the appeal.
You can't have the choke point without the choke point.
The architecture that makes the threat credible is the architecture that makes people want to leave.
Hilbert: The framed printout was a CHIPS transaction log. He had it mounted. My old boss.
Sorry, go ahead.
Hilbert: I spent eighteen months at a mid-sized European bank reviewing correspondent banking relationships for dollar exposure. That was the job title. Dollar exposure. Back office, no windows, a desk and a phone.
The boss with the framed log.
Hilbert: He'd point at it when new people started. Like a hunting trophy. Anyway. The thing I wanted to say is that you're both right, but the phrase is wrong. "Cut off from the dollar system" makes it sound like a switch gets flipped.
It isn't?
Hilbert: Nobody sends you a letter. What happens is your US correspondent calls and asks a lot of questions. Then settlements start taking longer. Then they stop offering dollar services to certain clients. Then they stop offering them at all. By the time anything official is said, you've been dead for six months and nobody told you.
The de-risking isn't a side effect.
Hilbert: It's the whole mechanism. The banks do the cutting themselves. They just need to be scared enough. My old boss used to say the dollar system isn't a network, it's a nervous system. You don't have to cut the nerve. You just have to make it twitchy.
That's a better description than anything we said.
Hilbert: I still have the printout. It's in a box somewhere. My wife has been trying to throw it away for years. I should go. I left the iron on.
The nervous system metaphor is doing real work. Because it explains why the formal designation list is almost beside the point.
The list is the threat. The twitchiness is the enforcement.
It explains the enforcement credibility problem differently. If compliance depends on banks being scared, then the question isn't whether Pakistan complies. It's whether Pakistani banks believe their dollar access is at risk.
Which is a much lower bar. And a much harder one to measure.
The open question is whether the US goes back to sole-currency-based enforcement. As of May, all fifteen enforcement actions in Trump's second term rested on US persons or US territory. None solely on the dollar nexus.
But Bessent's threat is explicitly a dollar-access threat. So either the tool comes back, or the threat is louder than the enforcement.
That's the thing to watch. Not the designation list. Whether the next enforcement action rests on dollars alone.
If it does, the dollar system just got a lot more expensive to be outside of. And a lot more attractive to leave.
One more thought for Daniel. The reason Iran goes to such lengths isn't that the greenback is convenient. It's that the alternative they built is also dollar-denominated. They didn't escape. They just moved to a version with a freeze button.
Which is the whole lesson. You can route around the banks. You can't route around the dollar.
Thanks to Hilbert Flumingtop for producing. This has been My Weird Prompts.
If you found this useful, send it to someone who thinks the dollar is just a currency. Email us at show at my weird prompts dot com. We'll be back soon.
