ERTH vs. OILK
ERTH (Invesco MSCI Sustainable Future ETF) and OILK (ProShares K-1 Free Crude Oil Strategy ETF) are both exchange-traded funds - ERTH is a Alternative Energy Equities fund tracking the MSCI Global Environment Select Index, while OILK is a Oil & Gas fund tracking the Bloomberg Commodity Balanced WTI Crude Oil Index. Both are passively managed. Over the past 5 years, ERTH returned -5.81%/yr vs 13.00%/yr for OILK. At a 0.17 correlation, their price movements are largely independent. ERTH charges 0.55%/yr vs 0.68%/yr for OILK.
Performance
ERTH vs. OILK - Performance Comparison
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Returns By Period
In the year-to-date period, ERTH achieves a 0.55% return, which is significantly lower than OILK's 40.78% return.
ERTH
- 1D
- -2.53%
- 1M
- -4.42%
- YTD
- 0.55%
- 6M
- -0.40%
- 1Y
- 13.85%
- 3Y*
- 1.43%
- 5Y*
- -5.81%
- 10Y*
- 7.36%
OILK
- 1D
- -0.59%
- 1M
- -13.38%
- YTD
- 40.78%
- 6M
- 38.63%
- 1Y
- 27.24%
- 3Y*
- 13.91%
- 5Y*
- 13.00%
- 10Y*
- —
ERTH vs. OILK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ERTH Invesco MSCI Sustainable Future ETF | 0.55% | 18.47% | -13.56% | 0.12% | -27.59% | 2.64% | 51.02% | 36.78% | -12.49% | 30.53% |
OILK ProShares K-1 Free Crude Oil Strategy ETF | 40.78% | -11.86% | 8.18% | -0.97% | 27.57% | 63.71% | -61.09% | 30.48% | -20.40% | 2.82% |
Correlation
The correlation between ERTH and OILK is -0.23, 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 | -0.23 |
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 ERTH and OILK shifts across timeframes, from -0.23 (1 year) to 0.17 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
ERTH vs. OILK — Risk / Return Rank
ERTH
OILK
ERTH vs. OILK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Invesco MSCI Sustainable Future ETF (ERTH) and ProShares K-1 Free Crude Oil Strategy ETF (OILK). 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.
| ERTH | OILK | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.16 | ||
| Sortino ratioReturn per unit of downside risk | -0.22 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.18 | -0.03 |
| Calmar ratioReturn relative to maximum drawdown | 1.72 | 1.57 | +0.15 |
| Martin ratioReturn relative to average drawdown | 4.42 | 3.49 | +0.93 |
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Drawdowns
ERTH vs. OILK - Drawdown Comparison
The maximum ERTH drawdown since its inception was -64.45%, smaller than the maximum OILK drawdown of -83.76%. Use the drawdown chart below to compare losses from any high point for ERTH and OILK.
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Drawdown Indicators
| ERTH | OILK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -64.45% | -83.76% | +19.31% |
Max Drawdown (1Y)Largest decline over 1 year | -8.07% | -17.41% | +9.34% |
Max Drawdown (3Y)Largest decline over 3 years | -33.82% | -23.42% | -10.40% |
Max Drawdown (5Y)Largest decline over 5 years | -51.72% | -34.69% | -17.03% |
Max Drawdown (10Y)Largest decline over 10 years | -51.72% | — | — |
Current DrawdownCurrent decline from peak | -32.26% | -17.41% | -14.85% |
Average DrawdownAverage peak-to-trough decline | -21.49% | -32.48% | +10.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.14% | 7.86% | -4.72% |
Volatility
ERTH vs. OILK - Volatility Comparison
The current volatility for Invesco MSCI Sustainable Future ETF (ERTH) is 6.57%, while ProShares K-1 Free Crude Oil Strategy ETF (OILK) has a volatility of 8.02%. This indicates that ERTH experiences smaller price fluctuations and is considered to be less risky than OILK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ERTH | OILK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.57% | 8.02% | -1.45% |
Volatility (6M)Calculated over the trailing 6-month period | 12.97% | 24.07% | -11.10% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.34% | 29.00% | -11.66% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.96% | 30.27% | -7.31% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.56% | 35.96% | -13.40% |
ERTH vs. OILK - Expense Ratio Comparison
ERTH has a 0.55% expense ratio, which is lower than OILK's 0.68% expense ratio.
Dividends
ERTH vs. OILK - Dividend Comparison
ERTH's dividend yield for the trailing twelve months is around 1.93%, less than OILK's 9.54% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ERTH Invesco MSCI Sustainable Future ETF | 1.93% | 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 | 9.54% | 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
ERTH and OILK have a correlation of -0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
OILK has higher volatility (8.02%) compared to ERTH (6.57%). In terms of maximum drawdown, ERTH dropped -64.45% vs OILK's -83.76%.
On 5-year performance, OILK leads with 13.00% vs -5.81% for ERTH. On fees, ERTH is cheaper at 0.55% per year. On volatility, ERTH has been the lower-risk option at 6.57%. 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 13.00% return vs -5.81%. 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 9.54%, compared with 1.93% for ERTH.
ERTH is categorized as Alternative Energy Equities, while OILK is Oil & Gas. ERTH tracks MSCI Global Environment Select Index, while OILK tracks Bloomberg Commodity Balanced WTI Crude Oil Index. They also come from different issuers: Invesco and ProShares. Their fees differ too: 0.55% for ERTH and 0.68% for OILK.
OILK currently has the higher Sharpe Ratio (0.96 vs 0.80), 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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