USOvsOILKETF Comparison
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United States Oil Fund (USO) and ProShares K-1 Free Crude Oil Strategy ETF (OILK) belong to the same industry segment: Energy. USO is more expensive with a Total Expense Ratio (TER) of 0.7%, versus 0.69% for OILK. USO is up 96.76% year-to-date (YTD) with +$185M in YTD flows. OILK performs worse with 57.99% YTD performance, and +$135M in YTD flows. Run a side-by-side ETF comparison of USO and OILK below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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USO vs OILK performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/24/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | USO OILK | +27.39%+15.98% | +3.07%+2.75% | +96.76%+57.99% | +79.06%+43.90% | +92.75%+47.79% | +174.59%+83.27% |
| Flows | USO OILK | -$73M-$64M | +$225M+$7M | +$185M+$135M | +$100M+$117M | -$606M+$105M | -$2.96B+$151M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | USO OILK | +54.06%+35.93% | +49.13%+31.45% | +37.64%+27.47% | +38.04%+31.21% |
| Max drawdown | USO OILK | -31.88%-21.17% | -31.88%-21.17% | -31.88%-23.71% | -35.45%-36.59% |
| Max drawdown duration | USO OILK | 67d67d | 67d67d | 67d608d | 1365d1372d |
Trading data
USO | OILK | |
Last sale 7/24/2026 at 1:30 PM | $136.69 | $54.83 |
| Previous close 07/23/2026 | $139.49 | $54.94 |
| Consolidated volume 07/23/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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USO | OILK | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
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Main metrics
Last update 7/24/2026 at 1:30 PM
Live
Closed
USO | OILK | |
|---|---|---|
| Last price | $136.69 | $54.83 |
| 1D performance | -2.01% | -0.20% |
| AuM | $2.31 B | $215.12 M |
| E/R | 0.7% | 0.69% |
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Exposure
Countries
USO
Data will be available soon
OILK
Data will be available soon
Sectors
USO
Data will be available soon
OILK
Data will be available soon
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Diversification
USO
Data will be available soon
OILK
Data will be available soon
Top 15 holdings
Data as of January 1, 1970
USO
Data will be available soon
OILK
Data will be available soon
Frequently asked questions about USO and OILK
How have the USO and OILK ETFs performed in 2026?
As of July 24, 2026, USO is up 96.76% year-to-date (YTD), while OILK has returned 57.99%. That puts USO better performer ahead so far this year.
Which ETF is attracting more investor money: USO or OILK?
Year-to-date, the USO ETF saw +$185M in flows, compared to +$135M for OILK.
Which ETF is more volatile: USO or OILK?
Over the past year, USO had a volatility of 49.13%, while OILK experienced 31.45%.
Which ETF is bigger: USO or OILK?
As of July 24, 2026, USO holds $2.31 B in assets under management (AUM), while OILK manages $215.12 M.
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Latest news about USO & OILK
Israel – Iran War: Read This Before Investing in an Oil ETF
June 18, 2025
USO
Crude and Natural Gas Markets on the Move
August 12, 2024
USO
OILK
Crude Oil ETFs Surge Amid Summer Rally Speculations
June 24, 2024
USO
Crude Oil ETFs Surge Despite Falling Oil Prices
June 3, 2024
USO
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War in the Middle East: ETF Movers & Shakers
May 15, 2024
USO
OILK
War in the Middle East: ETF Movers & Shakers
May 15, 2024
USO
OILK
Oil Prices Fall After a Surprise Jump in U.S. Crude Stockpiles
January 16, 2024
USO
OILK
Energy Funds Stay in the Green as Oil Prices Inch Closer to $100 per Barrel
September 18, 2023
USO
OILK
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