Phillips 66 (PSX)

Phillips 66 is a downstream energy company. It does not drill for oil; instead, it buys crude oil at the wellhead or on the open market and turns it into gasoline, diesel, jet fuel, heating oil, and petrochemicals that other manufacturers use as feedstock. It also operates a midstream business that gathers, processes, and ships natural gas liquids — the hydrocarbons extracted alongside natural gas. The company was spun out from ConocoPhillips in 2012 and has been a publicly traded company ever since, operating under the ticker PSX on the New York Stock Exchange.

The business model is straightforward in concept: buy crude oil cheap, refine it into more-valuable products, and sell those products at a profit. The trick is that the margin between crude oil price and finished product prices fluctuates constantly based on supply and demand. When crude oil is plentiful and refined products are scarce, margins are fat. When crude is scarce or refined products glut, margins evaporate. Phillips 66’s earnings swing with the refining margin cycle.

From oil products to downstream energy: a brief history

The Phillips Petroleum Company was founded in 1917 in Oklahoma as an independent oil and gas producer. For most of the twentieth century, Phillips was known as a major oil and gas explorer and producer — a company that found and extracted oil and gas from the ground. The company thrived through the boom years and endured the downturns.

In the 1960s and 1970s, as oil markets became more global and more volatile, Phillips began building downstream assets — refineries, pipelines, and processing plants. These assets allowed the company to control more of the value chain. Instead of just selling crude oil in bulk to refiners, Phillips could refine the oil itself and capture the refining margin.

In 2002, Conoco and Phillips merged, creating ConocoPhillips. The combined company was huge — a fully integrated energy company with exploration and production assets, refining operations, and midstream infrastructure. But in 2012, the company was split. ConocoPhillips remained as the upstream exploration and production business, focused on finding and producing oil and gas. Phillips 66 was spun out as the downstream and midstream business, focused on refining and moving energy products.

The spinoff made sense strategically. An upstream producer wants to maximize oil and gas production and manage exploration risk. A downstream refiner wants to buy crude oil cheap, process it into finished products, and optimize margins. These are fundamentally different businesses with different economics and different management imperatives. By separating, each company could focus on what it did best.

How refineries work and why margins matter

A refinery is a massive complex of equipment that heats crude oil, separates it into components based on weight and boiling point, and chemically transforms some of those components into finished fuels. The process is continuous and enormous in scale. A large modern refinery might process a million barrels of crude oil per day, turning it into hundreds of thousands of barrels of gasoline, diesel, jet fuel, heating oil, and other products, plus petroleum feedstock for chemical manufacturers.

The fundamental economics are simple: the refinery buys crude oil (say, a hundred dollars per barrel), processes it, and sells gasoline (say, a hundred and five dollars per barrel), diesel, and other products (say, a total of a hundred and eight dollars per barrel). The spread of eight dollars per barrel is the gross margin from refining. The refinery then pays for labour, energy, maintenance, and other operating costs, yielding a net margin.

The margin is called the “crack spread” — the difference between the price of crude oil input and the price of the finished products output. It fluctuates constantly based on supply and demand for refined products relative to crude supply. When gasoline demand is strong and supply is tight, the crack spread widens and refiners make lots of money. When gasoline supply is ample and demand is weak, the crack spread narrows and margins evaporate.

Refiners cannot control the crack spread. It is set by global supply and demand. What they can control is how efficiently they operate. A refinery that minimizes downtime, keeps equipment well-maintained, and runs at high capacity utilization will capture margin better than one that breaks down frequently or runs below capacity.

Phillips 66 operates a portfolio of refineries in the United States — in the Midwest, the Gulf Coast, and California. Each refinery is optimized for the crude types available in that region and the products demanded locally. The Gulf Coast refineries can process heavy crude from Venezuela and Mexico alongside medium and light crudes, and they sell into a market with strong export infrastructure. The Midwest refineries process lighter crudes and serve the regional gasoline and diesel market. California refineries have stricter environmental rules and serve a smaller, more geographically isolated market.

The company also owns and operates pipelines and processing plants in the midstream business. These assets gather natural gas liquids from oil and gas fields, process them into separate products like ethane and propane, and ship them to markets or to chemical plants that use them as feedstock. The midstream business is more stable than refining because many of the assets operate under long-term contracts that guarantee a fixed or negotiated return regardless of market prices.

The refining cycle and profitability

Refinery margins are highly cyclical. In years when crude oil is plentiful (say, after a major discovery or when OPEC production rises), the crude oil price falls, but it takes time for downstream refining markets to adjust. Refiners buy cheap crude and still sell at recent prices, earning fat margins. Conversely, when crude is scarce and prices spike, refiners have to pay more for crude but cannot immediately push their product prices higher, so margins shrink.

The cycle also depends on global refining capacity. A new refinery opening in Asia or the Middle East can export refined products around the world, flooding certain markets and suppressing margins. Conversely, if old refineries close and are not replaced, tight refined product supply supports margins.

Geopolitical shocks also matter. A Middle East conflict that disrupts crude supplies will spike crude prices and narrow refining margins. A trade war that restricts the flow of refined products across borders can also reshape margins. Hurricanes in the Gulf of Mexico have shut down refining capacity and spiked margins for competitors’ surviving refineries.

Phillips 66’s profitability therefore depends partly on operational excellence (how efficiently it runs its refineries and midstream assets) and partly on luck (where the refining margin cycle lands during any given year). Management cannot control the cycle, but it can manage costs, invest in efficient equipment, and make smart acquisition and divestment decisions to position the company well.

Petrochemicals and downstream complexity

Phillips 66 also operates a petrochemicals business that takes products from its refineries and further processes them into chemicals used in plastics, fabrics, coatings, and other industrial applications. This adds a second layer of value. Instead of just selling gasoline, the company might sell some of that gasoline’s components as chemical feedstock for twice the margin.

The petrochemical business is also cyclical and margin-dependent, but it adds diversification and allows the company to capture more value from its crude oil input. A pound of crude oil that becomes petrochemical feedstock might yield more profit than a pound that becomes gasoline, especially if petrochemical margins are wide.

Returning cash and managing capital

Phillips 66 generates significant free cash flow from its operations. When refining margins are strong, the cash flow is enormous. The company has a capital allocation strategy that prioritizes returning cash to shareholders. It pays a substantial dividend and has authorized share buyback programs. During profitable years, a large portion of cash flow goes back to shareholders.

The company also invests in its business — building or upgrading refineries to handle new crude types, expanding pipeline capacity, and acquiring smaller midstream operators that expand its footprint. But because the refining business is not especially capital-intensive (it is not like building a new oil field from scratch), the company can return substantial cash and still reinvest in the business.

The company carries debt, but at levels that are manageable relative to its operating cash flow. During lean refining years, debt matters more because cash flow is lower and servicing debt becomes tighter. The company’s financial discipline has kept it investment-grade rated, which is important for accessing capital markets at reasonable costs.

Exposure to energy transition

The long-term question facing Phillips 66 and all refiners is the transition to lower-carbon energy. As the world shifts toward electric vehicles, gasoline demand will decline. As renewable energy expands, demand for petroleum-based fuels falls. Over decades, this is a real threat to the refining business.

Some oil majors have begun investing in renewable energy and biofuels as hedges against declining oil demand. Phillips 66 has made smaller moves in this direction but remains primarily a crude oil refiner and petrochemicals processor. The company’s future earnings will depend on how quickly global oil demand declines and whether it can adapt its assets and margins to a lower-demand environment.

The company does have an advantage in that petrochemicals have longer durability than fuels — plastic, fabrics, and chemical products will be needed for decades even if transportation shifts away from oil. Refining capacity can be redeployed or repurposed. But if oil demand collapses much faster than expected, the refining margins that support Phillips 66’s profitability could vanish.

The straightforward business

Phillips 66 is not mysterious. It buys crude oil, turns it into gasoline and diesel and petrochemicals, and sells them at a profit. Its earnings depend on how wide the refining margin is, how efficiently it runs its assets, and what investments it makes in upgrades and acquisitions. The company does this well and returns cash to shareholders. The risk is that long-term oil demand is declining and will continue to decline, which will eventually reduce the earnings power of the business. Until that happens — and it may take decades — Phillips 66 will continue to capture refining margins and print cash, as it has for years.