[VLO, MPC, PSX, DINO, PBF] What is happening after the rise in crude oil prices? The reason why capital has begun to move toward the globally tightening “diesel” market
When crude oil prices rise, the first things to attract attention are oil companies and crude oil-related stocks.
However, what cannot be overlooked in the current energy market is not crude oil itself, but the “diesel” that lies beyond it.
In the United States, diesel prices have risen to record highs, and global diesel supplies are tightening.
And this change is already beginning to appear in the profits of refining companies.
In this article, we will focus on the downstream market of “diesel,” which is not visible from news about rising crude oil prices alone, and examine the reasons why capital is moving there, as well as five related stocks.
■ Why diesel now?
Diesel is a fuel that supports global logistics and production activities, including trucks, ships, agricultural machinery, construction machinery, and mining equipment.
Unlike gasoline, a rise in diesel prices is not simply a matter of “gasoline becoming more expensive.”
It ripples across a wide range of economic activities, including logistics costs, agricultural costs, construction costs, and manufacturing costs.
In other words, when diesel prices rise, a flow occurs:
Crude oil
↓
Refining
↓
Diesel
↓
Logistics, agriculture, construction
↓
Corporate costs
↓
Product prices
The problem this time is that within this flow, “refined diesel” is particularly tight.
■ Diesel prices in the U.S. are at record highs
According to the U.S. Energy Information Administration (EIA), the average U.S. retail diesel price as of September 14, 2026, was $6.29 per gallon.
This is the highest level on a nominal price basis since the EIA began publishing data in 1994.
Moreover, it is not just caused by a simple rise in crude oil prices.
The EIA explains that a global tightening of distillate supplies—that is, diesel and similar products—and high diesel crack spreads are driving the price increase.
The crack spread is the price difference between crude oil and the petroleum products refined from it, and it is an important profitability indicator for refining companies.
■ U.S. refineries are actually operating at high capacity
This is an important point for this theme.
“If there isn’t enough diesel, why not just refine it in the U.S.?”
It’s not that simple.
According to the EIA, U.S. distillate production from January to August 2026 averaged about 5.1 million barrels per day.
This is the highest level since 2019.
Furthermore, the U.S. refinery utilization rate for the week ending September 11 was 97%.
In other words, U.S. refineries are operating at a very high level.
Even so, diesel inventories have not built up sufficiently.
As of September 11, U.S. distillate inventories were about 13%, or 15.8 million barrels, below the five-year seasonal average.
This is not a case of “the U.S. is not refining,” but rather a situation closer to “U.S. refining capacity alone cannot fill the global supply shortage.”
■ Diesel refining margins are also soaring globally
Even more important is Asia.
On September 16, the refining margin for 10ppm low-sulfur diesel in Asia rose to over $87 per barrel.
This is a significant expansion from the pre-war level of about $22 and is at a record high.
This does not just mean that the price of diesel itself is rising.
It means that the profitability of the refining process itself—”buying crude oil and making diesel”—is soaring.
Here, the place investors should look changes.
It is not just crude oil companies, but “refining companies.”
■ Refining company profits are actually surging
This time, we checked five companies as benchmark stocks.
VLO
Valero Energy
MPC
Marathon Petroleum
PSX
Phillips 66
DINO
HF Sinclair
PBF
PBF Energy
Looking at these five companies, it is clear that this rise in diesel and refining margins is not just market news, but is rippling into actual corporate earnings.
■ VLO | Valero Energy
Valero is a leading major U.S. refining company.
In the second quarter of 2026, earnings in the refining segment improved significantly.
In particular, the improvement in refining margins is boosting profits.
VLO is a representative stock for considering this theme, as it allows us to see “what happens to major refining companies when diesel and refining margins rise.”
The closing price on September 18, 2026, was $413.28.
In other words, it is a large-cap stock that is already highly valued by the market.
■ MPC | Marathon Petroleum
Marathon Petroleum is also one of the largest refining companies in the U.S.
In the second quarter of 2026, earnings in the refining and marketing segment improved significantly.
Global petroleum product supply disruptions and rising refining margins are being reflected in corporate earnings.
The closing price on September 18 was $424.89.
This, too, is already attracting market attention as a large-cap stock.
■ PSX | Phillips 66
Phillips 66 is an integrated energy company that possesses not only refining but also midstream infrastructure.
In the second quarter of 2026, it recorded profits on the scale of $3.8 billion, and the refining segment also improved significantly.
The refining utilization rate was 96%.
The closing price on September 18 was $273.13.
Slightly different from VLO and MPC, this is a stock where you can look at energy logistics and midstream businesses in addition to refining.
■ DINO | HF Sinclair
Among the five companies this time, HF Sinclair is positioned closer to a mid-cap.
The refining margin in the second quarter of 2026 was $25.95 per barrel.
This is a 57% increase from $16.50 in the same period last year.
The company explains that robust demand, supply tightening, and improved crack spreads boosted the refining segment.
The closing price on September 18 was $115.95.
At this point, it is still a large-cap stock, but there is a difference in corporate scale compared to VLO and MPC.
■ PBF | PBF Energy
Among the five stocks this time, PBF Energy is a company where it is particularly meaningful to look directly at changes in the refining market.
The refining margin in the second quarter of 2026 was $23.40 per barrel.
This is a significant increase from $8.38 in the same period last year.
Furthermore, it was $18.67 in the first half of 2026.
This is a significant improvement from $7.26 in the same period last year.
The closing price on September 18 was $77.20.
This is also no longer a low-priced stock, but the stock price level is lower than VLO and MPC, making it an important comparison target for observing changes in refining margins.
■ What can we see when we line up the five stocks?
Closing prices on September 18, 2026
VLO $413.28
MPC $424.89
PSX $273.13
DINO $115.95
PBF $77.20
What is important here is not the height of the stock price.
What the five companies have in common is that “refining margins are improving.”
In other words, in the market, a flow of capital has already begun:
Crude oil/energy price rise
↓
Petroleum product price rise
↓
Refining margin improvement
↓
Refining company profit improvement
■ So, where should we look from here?
This is the most important part of this investigation.
VLO, MPC, PSX, DINO, PBF.
These are very easy-to-understand stocks as an “entry point to the diesel problem.”
However, all five companies are already widely known in the stock market.
Therefore, if we end the investigation here, it will end with a story that anyone can understand: “Refining companies are making money because diesel is expensive.”
What we want to find as the U.S. Market Lab is one step below that.
■ Where money will move next due to diesel shortages
There are multiple conceivable flows of capital.
① Refining companies
② Fuel transportation
③ Terminals and storage facilities
④ Tankers and shipping
⑤ Fuel logistics
⑥ Maintenance and upkeep of refining equipment
⑦ Renewable diesel
⑧ Fuel supply infrastructure
⑨ Alternative fuels and fuel-saving related
In other words, from a single piece of news that “there is not enough diesel,” capital could ripple into multiple industries.
■ We particularly want to focus on “refining capacity”
If you view this problem simply as a rise in crude oil prices, you may miss the essence.
Even if crude oil exists,
Not enough refineries
↓
Not enough refining capacity
↓
Cannot make diesel
↓
Inventories decrease
↓
Product prices rise
This is what happens.
In fact, the EIA states that declining refining activity in Russia, China, and the Middle East is tightening global distillate supplies.
On the other hand, U.S. refineries are operating at high capacity.
This combination is a tailwind for U.S. refining companies.
■ However, this is not an eternal tailwind for refining companies
We need to look at this calmly as well.
If diesel prices rise, refining company margins may improve.
However,
Demand is destroyed
↓
Logistics volume decreases
↓
Agricultural/construction activity weakens
↓
Fuel demand decreases
A reverse rotation is also possible.
Furthermore, if governments take measures to curb fuel prices, it could affect corporate earnings.
Therefore, it is not a simple story of “diesel is high = buy refining stocks.”
■ Another important problem: “Inflation”
Diesel is directly linked to logistics and agriculture.
Therefore, if the price increase is prolonged,
Fuel costs
↓
Transportation costs
↓
Agricultural costs
↓
Food prices
↓
Consumer prices
A ripple effect could occur.
It is not just the United States.
If countries around the world have diesel supply problems at the same time, it will also be a troublesome issue for central banks.
Even if interest rates are raised, refineries and logistics networks destroyed by war cannot be restored immediately.
In other words, this diesel problem could lead not only to the “energy market” but also to “inflation,” “interest rates,” “logistics,” and “corporate profits.”
■ Points investors should look at now
Going forward, we want to check the following five points:
1. Will U.S. diesel inventories decrease further?
2. Will diesel crack spreads remain high?
3. Will U.S. refinery utilization rates remain near their limits?
4. Will global refining capacity recover?
5. How much can fuel demand in logistics, agriculture, construction, etc., withstand price increases?
■ And toward “low-priced stocks”
The VLO, MPC, PSX, DINO, and PBF we checked this time are merely benchmark stocks.
By looking at these five companies, you can understand “how diesel supply and demand is reflected in corporate profits.”
However, what the U.S. Market Lab wants to find further are the small companies around them.
Profits increase at large refining companies
↓
Demand for related services increases
↓
Ripple effect to fuel logistics, storage, transportation, equipment, etc.
↓
Capital also flows to small companies
↓
Possibility that low-priced stocks exist among them
The meaning of this investigation lies beyond this point.
■ Conclusion of this time
What we were able to confirm this time is clear.
In the current energy market, it is not just that “crude oil is expensive.”
Globally, the supply of distillates such as diesel is tightening, and refining margins are rising significantly.
In the U.S., diesel prices are at record highs, and distillate inventories are below the five-year seasonal average.
And at refining companies like VLO, MPC, PSX, DINO, and PBF, refining margins and profits are actually improving.
In other words, the flow of capital—
Crude oil
↓
Refining
↓
Diesel
↓
Logistics, agriculture, construction
↓
Corporate profits
—is beginning to enter actual corporate performance.
The question is how long this flow will continue.
And more importantly, “where will money head after the large refining companies?”
Just looking at the stock prices of VLO or MPC will not provide an answer yet.
Only by digging down into the surrounding fuel logistics, storage, transportation, equipment, and related service companies can we potentially see the “next destination for capital.”
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This investigation is the entry point.
This is research and investigation as of September 19, 2026.
*This article is for informational purposes only and does not recommend the buying or selling of any specific financial products or stocks. Please make investment decisions at your own risk.
