OILK vs. ERTH
OILK (ProShares K-1 Free Crude Oil Strategy ETF) and ERTH (Invesco MSCI Sustainable Future ETF) are both exchange-traded funds - OILK is a Oil & Gas fund tracking the Bloomberg Commodity Balanced WTI Crude Oil Index, while ERTH is a Alternative Energy Equities fund tracking the MSCI Global Environment Select Index. Both are passively managed. Over the past 5 years, OILK returned 13.20%/yr vs -5.15%/yr for ERTH. At a 0.17 correlation, their price movements are largely independent. OILK charges 0.68%/yr vs 0.55%/yr for ERTH.
Performance
OILK vs. ERTH - Performance Comparison
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Returns By Period
In the year-to-date period, OILK achieves a 41.61% return, which is significantly higher than ERTH's 3.16% return.
OILK
- 1D
- -1.44%
- 1M
- -12.86%
- YTD
- 41.61%
- 6M
- 40.08%
- 1Y
- 20.72%
- 3Y*
- 14.14%
- 5Y*
- 13.20%
- 10Y*
- —
ERTH
- 1D
- 0.10%
- 1M
- -1.94%
- YTD
- 3.16%
- 6M
- 1.78%
- 1Y
- 18.34%
- 3Y*
- 2.31%
- 5Y*
- -5.15%
- 10Y*
- 7.64%
OILK vs. ERTH - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OILK ProShares K-1 Free Crude Oil Strategy ETF | 41.61% | -11.86% | 8.18% | -0.97% | 27.57% | 63.71% | -61.09% | 30.48% | -20.40% | 2.82% |
ERTH Invesco MSCI Sustainable Future ETF | 3.16% | 18.47% | -13.56% | 0.12% | -27.59% | 2.64% | 51.02% | 36.78% | -12.49% | 30.53% |
Correlation
The correlation between OILK and ERTH is -0.24, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | -0.24 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.02 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.11 |
Correlation (All Time) Calculated using the full available price history since Sep 28, 2016 | 0.17 |
The correlation between OILK and ERTH shifts across timeframes, from -0.24 (1 year) to 0.17 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
OILK vs. ERTH — Risk / Return Rank
OILK
ERTH
OILK vs. ERTH - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ProShares K-1 Free Crude Oil Strategy ETF (OILK) and Invesco MSCI Sustainable Future ETF (ERTH). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| OILK | ERTH | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.36 | ||
| Sortino ratioReturn per unit of downside risk | -0.43 | ||
| Omega ratioGain probability vs. loss probability | 1.14 | 1.19 | -0.05 |
| Calmar ratioReturn relative to maximum drawdown | 1.23 | 2.28 | -1.05 |
| Martin ratioReturn relative to average drawdown | 2.67 | 5.93 | -3.26 |
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Drawdowns
OILK vs. ERTH - Drawdown Comparison
The maximum OILK drawdown since its inception was -83.76%, which is greater than ERTH's maximum drawdown of -64.45%. Use the drawdown chart below to compare losses from any high point for OILK and ERTH.
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Drawdown Indicators
| OILK | ERTH | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -83.76% | -64.45% | -19.31% |
Max Drawdown (1Y)Largest decline over 1 year | -16.92% | -8.07% | -8.85% |
Max Drawdown (3Y)Largest decline over 3 years | -23.42% | -33.82% | +10.40% |
Max Drawdown (5Y)Largest decline over 5 years | -34.69% | -51.72% | +17.03% |
Max Drawdown (10Y)Largest decline over 10 years | — | -51.72% | — |
Current DrawdownCurrent decline from peak | -16.92% | -30.50% | +13.58% |
Average DrawdownAverage peak-to-trough decline | -32.48% | -21.49% | -10.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 8.89% | 3.10% | +5.79% |
Volatility
OILK vs. ERTH - Volatility Comparison
ProShares K-1 Free Crude Oil Strategy ETF (OILK) has a higher volatility of 8.06% compared to Invesco MSCI Sustainable Future ETF (ERTH) at 6.22%. This indicates that OILK's price experiences larger fluctuations and is considered to be riskier than ERTH based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OILK | ERTH | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 8.06% | 6.22% | +1.84% |
Volatility (6M)Calculated over the trailing 6-month period | 24.09% | 12.79% | +11.30% |
Volatility (1Y)Calculated over the trailing 1-year period | 29.05% | 17.18% | +11.87% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 30.27% | 22.94% | +7.33% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 35.97% | 22.65% | +13.32% |
OILK vs. ERTH - Expense Ratio Comparison
OILK has a 0.68% expense ratio, which is higher than ERTH's 0.55% expense ratio.
Dividends
OILK vs. ERTH - Dividend Comparison
OILK's dividend yield for the trailing twelve months is around 9.48%, more than ERTH's 2.31% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ERTH Invesco MSCI Sustainable Future ETF | 1.88% | 1.46% | 1.00% | 1.28% | 1.22% | 15.33% | 0.21% | 0.71% | 0.61% | 0.87% | 1.06% | 0.79% |
OILK ProShares K-1 Free Crude Oil Strategy ETF | 9.48% | 4.79% | 3.11% | 5.80% | 17.32% | 68.82% | 0.13% | 0.94% | 0.58% | 6.17% | 0.00% | 0.00% |
Frequently Asked Questions
OILK and ERTH have a correlation of -0.24, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
OILK has higher volatility (8.06%) compared to ERTH (6.22%). In terms of maximum drawdown, OILK dropped -83.76% vs ERTH's -64.45%.
On 5-year performance, OILK leads with 13.20% vs -5.15% for ERTH. On fees, ERTH is cheaper at 0.55% per year. On volatility, ERTH has been the lower-risk option at 6.22%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, OILK has performed better with a 13.20% return vs -5.15%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
ERTH is cheaper with a 0.55% expense ratio, compared with 0.68% for OILK.
OILK has the higher dividend yield at 9.48%, compared with 2.31% for ERTH.
OILK is categorized as Oil & Gas, while ERTH is Alternative Energy Equities. OILK tracks Bloomberg Commodity Balanced WTI Crude Oil Index, while ERTH tracks MSCI Global Environment Select Index. They also come from different issuers: ProShares and Invesco. Their fees differ too: 0.68% for OILK and 0.55% for ERTH.
ERTH currently has the higher Sharpe Ratio (1.07 vs 0.72), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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