# 80% of Ceasefires Fail. Wall Street Bought This One Anyway
> We tracked the 72 hours after the US-Iran ceasefire: Dow +2.85%, WTI -16.4%, defense flat — and the base rates that say most truces die young.
- Author: Barebone Research, Barebone AI
- Published: 2026-04-10
- Canonical: https://barebone.ai/resources/us-iran-ceasefire-trading-the-truce
- Publisher: Barebone AI (https://barebone.ai)
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## The Eight O'Clock Deadline
On Tuesday evening, the United States was ninety minutes from a deadline of its own making. At 8 p.m. ET on April 7, the pause on American strikes against Iranian infrastructure was set to expire, and the president had spent the run-up describing what would follow in language stark even by the standards of this war:
> "A whole civilization will die tonight, never to be brought back."
At roughly 6:30 p.m., a different post arrived instead. A two-week ceasefire, mediated by Pakistan. Iran would "immediately open the Strait of Hormuz" — the 21-mile-wide channel that carries roughly 20 million barrels of oil a day, about a fifth of world consumption, and which has been effectively shut since February 28. Hours later, Foreign Minister Abbas Araghchi confirmed Tehran's acceptance.
Equity futures went vertical overnight. The next session was the kind traders mark on calendars: the Dow rose **1,325 points (+2.85%)**, its best day in a year. The S&P 500 gained **+2.51%**. WTI crude settled down **-16.41% at $94.41**.
So we did what we always do when one headline moves this much money this fast: we used Barebone to mark every piece of the ceasefire against the tape — what was actually agreed, what repriced, and what the historical record says about deals like this one.
Three numbers up front, as a promise of receipts: **80% of ceasefires since 1975 have failed. The average failed ceasefire is followed by an offensive within 13 days. This one is scheduled to last 14.**
## What Was Actually Agreed
Start with the deal itself, because less was agreed than the rally implies. There is no joint text. Each side announced its own version.
| Term | What was announced | Status |
|---|---|---|
| Duration | Two weeks | Agreed by both sides |
| Strait of Hormuz | "Complete, immediate, and safe opening" | Disputed in practice — see below |
| Talks | 15–20 day negotiating window, channeled through Pakistan, to be finalized in Islamabad | Agreed |
| Nuclear program | Iran to halt its alleged pursuit of a weapon in a final deal | US framing; no Iranian text |
| Sanctions | Relief signaled, conditional on Iranian concessions | US framing |
| US regional posture | Sanctions lifted and US forces withdrawn from regional bases | Iranian framing — its "10-point plan" |
| Lebanon | Pakistan's prime minister says the ceasefire "includes Lebanon" | Netanyahu says it "does not include Lebanon" |
Read the last three rows again. Tehran announced the ceasefire as a victory — it says Washington accepted a 10-point plan that includes lifting all sanctions and withdrawing US forces from regional bases. Trump called the Iranian proposal "a workable basis on which to negotiate," which is not the same thing as accepting it. And the two principals do not even agree on which countries the ceasefire covers: within hours of the announcement, Israel's prime minister publicly rejected the Pakistani claim that Lebanon was inside it.
A ceasefire where the parties dispute the terms on day one is not a peace agreement. In the academic literature it is a *cessation of hostilities* — the loosest category of truce, a pause agreed faster than the disagreements underneath it. Hold that thought; the distinction turns out to be worth money.
## The Repricing
Wednesday's session was a clean experiment: one variable changed overnight, and every war-sensitive asset got marked against it.
Three things stand out.
**The peace trade was airlines, not energy.** Jet fuel is one of the two largest costs an airline has, so a -16% session in crude flows almost directly into next quarter's margins. Delta — which happened to report first-quarter earnings that very morning, a beat — traded **+12%**. American rose **+11%**, JetBlue **+9%**, Southwest nearly **+13%**. Even Boeing's **+3.62%** is the same trade one step removed: cheaper fuel and fewer missiles improve the case for buying airplanes.
**The relief was broad.** The Dow's 1,325-point day was its best in a year, and by Friday's close the S&P 500 had posted **+3.68% on the week — its best week since November**. This is what it looks like when hedges come off and sidelined money chases.
**And defense did not participate — in either direction.** Lockheed Martin, which entered the war up 36.1% on the year, slipped **-0.25%**. Northrop Grumman fell **-0.66%**, General Dynamics **-0.27%**. RTX actually rose +2.09%, dragged by its commercial-aerospace half. On the day peace supposedly arrived, the market declined to take the war premium out of the war stocks.
That last one is the tell. If investors believed this ceasefire ends the conflict, the defense complex — up double digits on exactly this war — is where the unwind would show. It didn't. Equities priced *relief*. They did not price *resolution*.
## The $8.27 Trillion Excuse
Why was the relief so violent? Part of the answer is sitting in money-market funds.
Assets in US money-market funds hit a record **$8.27 trillion** in March, per Bloomberg's tally — a dash for cash fueled by the war itself, by single-day crashes like Korea's worst session in history, and by traders betting the oil shock would force the Fed to stay tight or even hike. That is the largest cash pile ever assembled, earning a yield, waiting for a reason.
A ceasefire headline is the reason. Not because anyone on a desk believes a two-week truce settles a war — but because the cost of being the last fund manager to re-risk, if it *does* hold, is a career-sized underperformance. Cash piles this large convert headlines into rallies mechanically: the first buyers force the next ones in.
But notice what the cash pile does not tell you: it says nothing about whether the ceasefire holds. It only guarantees that the market's reaction to good news will be disproportionate. The same mechanism that produced Wednesday also produced March 23 — and March 23 is the round trip everyone trading this week should have taped to their monitor.
## We Have Run This Experiment Before
This is not the first de-escalation rally of this war. It is the second, and the first one died in four days.
On Monday, March 23, a Truth Social post claimed "very good and productive conversations" toward ending the war. Brent crude fell **-10.9% to $99.94** that day; the S&P 500 rose +1.15%. Iran called the claimed talks "false and baseless." By March 25, Tehran had formally rejected the 15-point proposal Pakistan delivered. By Friday, March 27, Brent had settled back at **$112.57**. The entire peace dividend round-tripped in a week.
Zoom out further and the pattern repeats at every scale. We used Barebone to pull the recent record of ceasefires brokered by this administration and mark each against what followed:
| Deal | Brokered | Status as of April 10, 2026 |
|---|---|---|
| Israel–Iran ("Twelve-Day War") | June 24, 2025 | Held eight months — until the February 28 strikes that began this war |
| Thailand–Cambodia | July 2025 | Faltered repeatedly; fighting resumed December 2025, Bangkok rejecting new truce calls |
| Gaza (20-point plan) | October 2025 | Standing on paper; violence continued, with nearly 400 Palestinians killed in the months after (Time) |
| US–Iran "pause" | March 23, 2026 | Dead within 48 hours; Iran rejected the 15-point proposal March 25 |
| US–Iran two-week ceasefire | April 7, 2026 | Day three: the strait is still effectively closed |
When PolitiFact went through the administration's "ended wars" list last August, it found real but temporary ceasefires and scant evidence of permanently resolved conflicts. That is not a partisan observation — it matches the global base rate.
And the global base rate is brutal. A study by Jason Quinn and Madhav Joshi covering **196 conflicts between 1975 and 2011** found that **80% of ceasefires failed**. Patrick Burke's survey of 25 wars from 1947 to 2016 counted 105 failed ceasefires — and found **84% were followed by an offensive within an average of just 13 days**. Durability research splits truces by type: of the loose cessation-of-hostilities deals — the category this one belongs to — only **48% are still in effect at three months, and 21% survive a year**. Definitive, fully-negotiated agreements survive at better than 65%.
The April 7 deal is a two-week cessation of hostilities with no joint text, a disputed Lebanon carve-out, and a 13-day average lifespan for its failed predecessors. The market knows all of this. That is precisely why defense didn't sell off.
## Seventy-Two Hours In, It's Already Wobbling
Here is the part a reader in May will know and we, writing on Friday evening, do not: whether this ceasefire survives its two weeks. What we can do is log what the first 72 hours actually looked like — because they are not what the rally implied.
**Wednesday, April 8.** In the first twelve hours of the "complete, immediate and safe opening," exactly **two ships** transited the Strait of Hormuz. **426 tankers**, 34 LPG carriers and 19 LNG vessels sat waiting outside. The same day, Israel launched its heaviest wave of strikes on Lebanon since the war began — roughly 100 airstrikes in 10 minutes — under the position that Lebanon sits outside the ceasefire. Gulf states reported intercepting dozens of drones; a fire broke out at Iran's Lavan oil refinery, which Israel denied causing.
**Thursday, April 9.** Iran began letting a trickle of vessels through — dry-cargo ships only, no oil or gas tankers, reportedly charging tolls exceeding **$1 million per vessel**. The CEO of Abu Dhabi's national oil company said flatly that the strait "is still not open." A maritime-intelligence firm described it as a "supervised pause." Crude, which had collapsed Wednesday, turned around and rose about 3%.
**Friday, April 10.** By today, a total of **15 ships** had made it through — against a pre-war baseline of about nine per day for that class of traffic. Hezbollah rockets hit northern Israel overnight; sirens sounded in Tel Aviv and Haifa. And the president himself told reporters Iran was doing "a very poor job" handling oil transit — "not the agreement we have." Brent settled at **$95.20**, WTI at **$96.57**. The S&P 500 slipped 0.11%.
Look at where the round trip actually ends. Brent at $95.20 is the spike gone — but it is still **a third above the $71.32 close on the eve of the war**. The oil market is telling you the strait is open *de jure* and closed *de facto*, and it is pricing the difference at about $24 a barrel. Equities celebrated the headline; crude is grading the implementation. One of them is being more careful than the other.
## The Chaos Hedge
Which brings us to how professionals actually trade a binary they cannot predict. The honest answer is: many don't predict it at all. They structure around it.
The cleanest version is a two-legged position. **Leg one: out-of-the-money call options on crude** — contracts that pay off only if oil rips back above a chosen strike. A call option is the right, not the obligation, to buy at a set price; you pay a premium up front and that premium is the most you can lose. It behaves like insurance against the ceasefire collapsing: if Hormuz slams shut again, the spot market does the work and the calls multiply. **Leg two: airlines** — the most direct equity beneficiaries of de-escalation, because falling fuel drops almost straight to their margins. If the truce holds and crude keeps bleeding lower, the airline leg pays for the expired insurance.
War resumes: the calls cover the airline drawdown. Peace holds: the airlines outrun the lost premium. The position is a bet on *movement*, not direction — on the one thing this war has reliably produced.
Now the caveats, because the structure is less free than it sounds.
**The insurance is no longer cheap.** Options are priced off volatility, and crude has spent six weeks going from $71 to past $120 and back to $95. Sellers of oil calls have watched the building burn twice; they price the policy accordingly. The "lottery ticket" framing works when implied volatility is low. It is not low.
**There is a third scenario, and we are living in it.** Collapse pays leg one; real peace pays leg two. A supervised pause — strait half-open, tolls at $1 million a ship, oil pinned near $95 — pays neither. Crude doesn't spike, so the calls decay; fuel doesn't actually get cheap, so the airline margin story stalls. Delta said as much while reporting its beat on Wednesday, warning that the fuel and demand outlook still hinges on a war it doesn't control. A two-week clock can simply tick down into muddle, and muddle is where both legs lose slowly.
**And the market is already running this trade — which means you're late to part of it.** The airlines repriced +9% to +13% in one session. Defense never gave back its premium. The barbell is, to a first approximation, the current price.
## What This Means
The framework for the next eleven days is not "will there be peace." It is a short list of observable signals, each with a number attached.
**Count the ships, not the statements.** Fifteen transits in three days against a nine-a-day baseline is a closed strait with exceptions. Tanker traffic — oil and LNG specifically, not dry cargo — is the only fact that converts this ceasefire from announcement to reality. Shipping analysts already expect normalization to take weeks even in the good scenario.
**Watch the defense complex for the all-clear the indices already claimed.** Lockheed, Northrop and General Dynamics holding their war premium is the market's actual probability estimate. If those names start unwinding in size, the smart money is changing its answer.
**Watch crude's floor, not its ceiling.** Brent stalling near $95 — a third above pre-war — is the implementation discount. It falls toward the $70s only if real tankers move; it reverts toward $113 within days if the pattern of March 23 repeats.
**And respect the clock.** The truce expires in two weeks; failed ceasefires historically draw an offensive within 13 days; the Lebanon carve-out is being contested with airstrikes right now. Against that, a record $8.27 trillion in cash guarantees the next headline — in either direction — gets amplified.
The base rates say this ceasefire probably dies. The cash pile says the rally didn't need it to live — it needed an excuse. Both things were true on Wednesday, and the traders who understood that didn't pick a side. They got paid for the distance between a headline and a tanker.
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*Data: Barebone | Sources: White House and Iranian foreign ministry statements (April 7–10, 2026), Delta Air Lines Q1 2026 earnings (April 8, 2026), Quinn & Joshi ceasefire dataset (1975–2011), Burke ceasefire survey (1947–2016), PolitiFact (August 2025), Time (December 2025), contemporaneous wire and press reports | Prices as of April 10, 2026 close*