A tail-risk call on refining margins
The bet: traffic through the Strait of Hormuz and refined-product exports stay restricted, with no durable Trump-Iran resolution before the November midterms. The 3-2-1 crack has already moved from the low $20s to the mid $40s. Here is the convex, defined-risk options structure we put on for further widening.
Since the US "excursion" in Iran started, the 3-2-1 crack has moved from the low $20s to the mid $40s. That is the setup.
Our thesis is that traffic through the Strait of Hormuz stays restricted for longer, keeping refined-product exports constrained. We do not expect Trump and Iran to find a durable resolution to the strait's closure before the November midterms. That is our working assumption, not a certainty.
This is not a value long in refiners. It is a margins trade. If refined products cannot reach the market and more refining capacity is lost, the crack can widen further even if crude flails about like crude usually does.
So we want tail-risk calls on refiners, not stock. Defined loss, convex upside, and exposure to the earnings that stronger margins can deliver.
We expect no durable Trump-Iran resolution to the Strait of Hormuz closure before the November midterms, leaving shipping and refined-product exports restricted for longer. Together with refinery outages, that keeps product supply tight and can push the 3-2-1 crack wider. The expression is out-of-the-money calls on VLO and MPC, where the premium paid is the maximum loss and the upside stays open.
The spread is the trade
It is the refiner's margin, written as a trade: buy 3 barrels of crude oil, sell the 2 barrels of gasoline and 1 barrel of distillate (diesel and jet fuel) that a refinery turns them into. The leftover per barrel is a gross margin before operating costs. When the crack widens, refiners like VLO and MPC can earn more on every barrel they process, making it a useful gauge of how good the refining business is right now.
Refiners do not sell crude. They buy crude, run it, and sell gasoline and distillate. The difference is the crack spread, and the standard benchmark is the 3-2-1 crack: three barrels of crude in, two of gasoline and one of distillate out.
Through last year it sat around the low $20s. After the late-February war onset it broke sharply higher, and by early April it was already in the mid $40s.
That matters because this is a margin story, not a call on crude direction. If refined-product supply stays impaired, the crack can stay wider for longer than people expect. Mean reversion sounds nice, until the physical market says otherwise.
3-2-1 crack spread, daily close through the 09-Apr-26 entry. The marker is the late-Feb war onset. Hover to read any day.
Why it can keep going
The second leg of the thesis is physical, and its duration matters.
A quick reopening of Hormuz would weaken the case. We are betting against that outcome. Our view is that Trump and Iran will not reach a durable resolution before the November midterms, so traffic through the strait remains restricted and refined-product exports remain constrained. A diplomatic headline is not the same thing as a sustained return of export flows.
That means the disruption need not depend entirely on more refineries going offline. Products that cannot be shipped to buyers still leave the receiving market short. Refinery outages can compound that export bottleneck.
Refined-product supply is tight in the short run. Refineries do not just decide to "try harder" because margins are attractive. They are either running hard already, or they are down for maintenance. Capacity utilisation has a ceiling, and seasonally it tends to rise from the late-winter turnaround trough toward a summer peak.
Right now, utilisation is coming off that trough in the low 90s. Historically the summer peak reaches the high 90s. So there is not much spare capacity waiting to save the day.
If export restrictions persist and war disruption takes capacity offline while the system is already climbing toward that seasonal ceiling, replacement supply is limited. That is how cracks can gap and stay wide.
US refinery utilization, EIA weekly percent of operable capacity, through the 09-Apr-26 entry. Coming off the late-winter turnaround trough in the low 90s, with the summer peak, historically the high 90s, still ahead. Hover to read any week.
Which names
If the view is on the crack, pick the equities with the cleanest exposure to it.
Valero (VLO) and Marathon (MPC) fit. At the 09-Apr-26 entry both had lagged the move in the crack: VLO around $235, MPC near $224. The margin had already moved. The equities had not fully caught up.
VLO and MPC daily close through the 09-Apr-26 entry, lagging the crack.
- Valero (VLO) is the cleaner refining expression. More direct exposure to the crack, less diversification to dilute it.
- Marathon (MPC) brings refining exposure with some ballast from MPLX and buybacks. Still plenty of crack sensitivity, just with a slightly steadier profile.
Why options
The thesis is asymmetric, so the structure should be too.
If disruption persists or compounds, margins can move hard and earnings can re-rate quickly. If the situation cools off, the trade goes away. Long calls fit that shape better than stock: premium is the max loss, upside stays convex.
The political thesis runs through the November midterms, but the trade is aimed at a repricing over the next two to three months as the market recognises that restrictions may last. September expiry gives roughly five months of runway from the 09-Apr-26 entry, providing a time cushion without buying year-plus options.
These calls expire before November. They do not cover the full political timeline, and the thesis being right eventually is not enough. The equities need to respond before expiry.
Strike selection matters too. We keep it inside roughly 10% out of the money. At entry, the VLO $250 call and MPC $240 call sat about 6-7% OTM, close enough to carry real delta, cheap enough to stay interesting.
| Leg | Contract | Strike vs spot | Entry premium |
|---|---|---|---|
| VLO call | 18-Sep-26 $250 C | ~6% OTM | $19.50 |
| MPC call | 18-Sep-26 $240 C | ~7% OTM | $16.20 |
| Blended | equal premium, 2 legs | both legs | $35.70 |
Entry fills, 09-Apr-26, from the option trade tape.
Max loss = $35.70 blended premium · upside convex to a continued crack blowout
One contract of each leg costs $3,570 net, about 3.6% of a $100k book and below our 5% spending limit. That $3,570 is also the maximum possible loss.
Simple enough: a defined cheque to buy a shot at a much bigger move.
The price-target ladder
With long calls, the target is a discipline, not a ceiling. House rule is simple: we want 3:1 reward-to-risk or better.
At expiry, the maths is clean because the option is worth intrinsic value. Using the entry-day premiums, here is where each underlying would need to trade to clear the main rungs:
| Reward:risk | Option worth | VLO gets there at | MPC gets there at |
|---|---|---|---|
| 3:1 | 4x premium | ~$328 (+40%) | ~$305 (+36%) |
| 5:1 | 6x premium | ~$367 (+56%) | ~$337 (+51%) |
| 10:1 | 11x premium | ~$464 (+98%) | ~$418 (+87%) |
Underlying level that clears each reward:risk rung at the 18-Sep-26 expiry, using intrinsic value on the entry-day premiums. Before expiry, residual time value means each rung is reached a few points sooner.
The working target is the 3:1 rung: VLO around $328 and MPC around $305. If the crack keeps widening and equities start catching up properly, those levels are aggressive but not silly.
Above that, the payoff curve does what we bought it to do.
Here is the VLO leg as the payoff builder showed it on 09-Apr-26, frozen at entry: the actual chain, the $19.50 fill, and the target line on the curve.
The MPC $240 call has the same basic shape. Both legs are plain long calls: fixed downside, rising upside.
What would make us wrong
There is no mystery here.
The clearest invalidation is a quicker-than-expected Trump-Iran resolution that restores traffic through Hormuz and refined-product exports. If capacity also comes back and the crack slides toward its old range, the calls can decay and the full premium can be lost. Our expectation of restrictions lasting through the November midterms has to be tested against physical flows, not defended regardless of what happens.
A second risk is that crude spikes faster than products and compresses the crack. The thesis is that refined-product supply disruption dominates that effect, but if the spread narrows rather than widens, we are wrong.
Timing is a separate risk. Restrictions could persist as expected without VLO and MPC rising enough before the September expiry. A correct political forecast does not guarantee a profitable options trade.
That is why this is an options trade and not a heroic stock bet. The risk is defined up front, and the whole bill is $3,570 net (~3.6% of the book).
See this in the terminal.
Every chart, KPI, and screen in this post is live in the Long/Short Terminal across 3,000+ US equities and ADRs.
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