Why Does an Oil ETF Lose Money Even When Oil Prices Stay Flat?
Direct answer
Where the money goes
Because most oil ETFs hold futures contracts, not barrels, and have to sell the expiring contract and buy a later one every month. When later contracts cost more than the near one, a market state called contango, each roll buys fewer contracts with the same money. If oil prices and the curve stay unchanged, the fund loses that difference every month: a 1.4% gap between the first two contracts compounds to a loss of about 16% over a year in our example. Leveraged and inverse oil funds add a second drag, because they reset daily and lose value in choppy markets even when oil ends where it started.
- Oil ETFs hold futures and roll them monthly
- Contango: next month costs more, so each roll buys fewer contracts
- 1.4% monthly contango ≈ −16% a year with flat prices (our calc)
- Backwardation does the opposite and adds return
- Leveraged and inverse funds also decay from daily resets
You buy an oil fund, oil goes sideways for six months, and the fund is down. Nothing is broken. The fund is doing what its prospectus says, and the cost is built into the way futures work.
What people on X are asking
In November 2026 one account explained that commodity ETFs hold futures, not the physical commodity, and roll them, which can cost money. An October 2026 post pointed out that when oil rises 10%, an oil ETF does not necessarily rise 10%. In May 2026 an energy research account warned that a 2x inverse crude oil fund was being eroded by roll yield in a backwardated market. And a 2025 post pointed out that the best-known oil ETF tracks front-month futures and suffers in contango. The replies to these posts were mostly trading opinions with nothing to check, so there is no thread summary. Here is the arithmetic.
The fact-checked answer
What the fund owns. The United States Oil Fund (USO) fund page says its benchmark is the NYMEX futures contract for light sweet crude delivered to Cushing, Oklahoma that is nearest to expiry, which changes over a five-day period at the start of each month into the next month's contract. It adds, in capitals, that USO is not a proxy for trading directly in the oil market.
Why rolling costs money in contango. Investor.gov's commodities guide notes that exchange-traded futures have a set unit size and a fixed expiration date. To keep exposure, a holder must close the expiring contract and open a later one. When later months are priced higher (contango), the fund sells low and buys high every month.
The roll in contango, with oil and the futures curve unchanged (illustrative)
Our arithmetic: 70 ÷ 71 = 0.986 contracts per roll; 0.986 to the 12th power = 0.844. Ignores fees and interest on cash collateral, which slightly offsets the loss. Per-barrel figures; one futures contract is 1,000 barrels. Tap a column header to sort.
| Start | $70.00 | $71.00 | 1.000 front contracts | $70.00 |
| Roll: sell front, buy next | $71.00 | 0.986 next-month contracts | $70.00 | |
| One month later: next becomes front at $70 | $70.00 | $71.00 | 0.986 | $69.01 (−1.4%) |
| After 12 identical months | $70.00 | $71.00 | 0.844 | $59.06 (−15.6%) |
The spot price never moved, yet the fund lost about 16% in a year. The opposite happens in backwardation: when later months are cheaper, each roll buys more contracts and the fund can beat the spot price. For an inverse fund, which is short futures, the signs flip: backwardation is the headwind. Our contango vs backwardation guide shows how the curve shape changes.
The extreme case. In April 2020, when storage ran short, the expiring WTI contract settled below zero; our page on how WTI futures went negative explains what that did to front-month funds.
The second drag: daily resets. Leveraged and inverse oil funds aim for a multiple of one day's move. The SEC and FINRA investor bulletin warns that over weeks or months their returns can differ significantly from the stated multiple, especially in volatile markets. Example for a 2x inverse fund: oil rises 10% (fund −20%), then falls 9.09% back to its start (fund +18.2%). Oil is flat; the fund is down 5.5% (0.80 × 1.182 = 0.945). Add contango on top and the decay compounds.
UXS decision diagram
Should you use an oil ETF to bet on oil?
Text version of the diagram
- Are you holding for days rather than months? If no: Check the curve: contango will erode a long hold
- Is the futures curve flat or in backwardation? If no: Expect roll losses on top of any oil move
- Is the fund unleveraged (not 2x, 3x or inverse)? If no: Daily-reset decay applies; keep holds very short
- Have you checked the fund's holdings and roll schedule? If no: Read the fund page before buying
- Otherwise: An oil ETF can fit a short to medium view; size it for roll costs
Diagram drawn by UXS. A simplified decision aid for education, not a recommendation.
Decision helper
| Product | Main drag |
|---|---|
| Front-month oil ETF | Roll cost in contango |
| Funds holding later months | Smaller roll cost, looser tracking |
| 2x or inverse oil fund | Daily reset decay plus roll |
| Oil producer stocks | Company risk instead of roll |
Related reading: what moves oil prices, what an OVX spike means and why US gas prices are high.
Common mistakes
- Expecting an oil ETF to match the spot price.
- Holding through months of steep contango.
- Treating a leveraged inverse fund as a long-term hedge.
- Never checking which contracts the fund holds.
FAQ
Why does USO not track the oil price?
It holds futures and rolls them; in contango each roll loses value.
What is contango?
When later futures contracts cost more than nearer ones.
Can an oil ETF gain when oil is flat?
Yes, in backwardation, when rolling buys cheaper later contracts.
Why do leveraged oil ETFs decay?
They reset daily, so choppy prices erode value even if oil ends flat.
How much does contango cost?
It varies; a 1.4% monthly gap compounds to about 16% a year in our example.
Is there an oil ETF without roll costs?
Any futures-based fund rolls; producer stocks avoid it but add company risk.
Sources
- United States Commodity Funds: USO fund page (benchmark and roll)
- CFTC: Basics of futures trading
- SEC Investor.gov: Commodity-linked investments
- SEC and FINRA: Updated investor bulletin, leveraged and inverse ETFs
- EIA: Crude oil spot and futures prices
Facts checked November 10, 2026. X posts are cited as evidence of the question, not of the answer.