COP vs PSX: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: PSX is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. COP and PSX share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined COP and PSX exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

ConocoPhillips (NYSE: COP) is an exploration and production (E&P) company focused exclusively on the upstream segment of the oil and gas industry. It finds, develops, and produces crude oil, natural gas, and natural gas liquids from a globally diversified asset base that includes U.S. Lower 48 shale plays (Permian, Eagle Ford, Bakken), Alaska (including the Willow development project), Canadian oil sands at Surmont, operations in Norway and Qatar, and equity stakes in LNG projects including Australia Pacific LNG and the Port Arthur LNG facility on the U.S. Gulf Coast. The company makes money by selling the hydrocarbons it produces at prevailing market prices, with profitability driven primarily by realized commodity prices, production volumes, and its cost-of-supply discipline. It does not operate refineries or fuel retail networks, giving it a focused capital structure but also direct exposure to commodity price swings.

Full COP guide

Phillips 66 is a leading integrated downstream energy provider headquartered in Houston, Texas. The company manufactures, transports, and markets products across five business segments: Refining, Midstream, Chemicals, Marketing and Specialties, and Renewable Fuels. Refining converts crude oil into gasoline, diesel, and other transportation fuels across a network of refineries with total crude throughput capacity of approximately 2.0 million barrels per day at end of 2025. The Midstream segment operates pipelines, terminals, NGL fractionation, and export facilities, including assets acquired from DCP Midstream and EPIC NGL. Chemicals earnings flow largely through CPChem, a joint venture with Chevron that produces petrochemicals and plastics. The Marketing and Specialties segment markets refined products through branded retail networks, including the JET brand in Europe. Revenue for fiscal year 2025 was approximately $132-137 billion (depending on whether other income is included), a decline driven by lower commodity prices, but 2026 has reversed that: trailing twelve-month revenue reached about $152.2 billion by mid-2026, with Q2 2026 revenue of about $52.0 billion up roughly 53% year over year.

Full PSX guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• COP drivers: Marathon Oil Integration and Scale; Willow Project and Long-Cycle Growth.
• PSX drivers: Midstream Growth as a Durable Earnings Anchor; Refining Efficiency and Portfolio Concentration.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: COP's revenues and free cash flow are highly sensitive to crude oil and natural gas prices, and the 2026 surge cuts both ways: second quarter earnings roughly doubled year over year, and analysts already model 2027 EPS about 7% below 2026, so a commodity pullback would hit a stock that has gained ~50% this year. For PSX, the dominant risk for PSX is the inherent cyclicality of refining margins.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick COP if you believe its drivers more; PSX if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the COP and PSX guides.

COP. COP's trailing P/E near 19x still sits well above its own 10-year median of around 12x, but the forward P/E near 14x shows how much of the gap is earnings catching up: analysts expect about $11.24 of 2026 EPS, up from $6.34 in 2025. Free cash flow of roughly $7.7 billion over the trailing twelve months has improved but still reflects heavy spending on Willow and LNG, with management projecting a material step-up toward 2029. With 26 analysts carrying a mean target near $149, only a few percent above the October price, much of the commodity rally is already in the valuation.

PSX. PSX trades near 16.7x trailing and 9.8x forward earnings, but the forward figure rests on 2027 consensus EPS of about $29.76, which assumes refining margins stay far above their 2025 levels. EV/EBITDA has expanded to about 13.4x as the share price more than doubled, well above the refining group average, and the price sits above the roughly $277 average analyst target. Q3 2026 results on October 28 (consensus about $11.84 per share on $43.2 billion of revenue) will show how much of the mid-year margin spike carried into the September quarter.

Headline figures (approximate, October 2026): COP shows revenue (ttm) ~$64.5 billion (Q2 2026 +35.5% YoY), net income (ttm) ~$9.25 billion, eps (trailing / forward) ~$7.55 / ~$10.52, p/e ratio (trailing / forward) ~19x / ~14x; PSX shows revenue (ttm) ~$152.2 billion (Q2 2026 ~$52.0 billion, up ~53% YoY), net income (ttm) ~$7.1 billion (Q2 2026 ~$3.85 billion), q2 2026 eps ~$9.41 vs ~$7.50 consensus, margins (ttm) ~13.1% gross, ~8.5% operating, ~4.7% net.

COP and PSX are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined COP and PSX exposure against your real portfolio. It is not an investment adviser.