CMDY vs. PDBC
CMDY (iShares Bloomberg Roll Select Commodity Strategy ETF) and PDBC (Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF) are both Commodities funds. CMDY is passively managed, while PDBC is actively managed. Over the past 5 years, CMDY returned 10.71%/yr vs 12.39%/yr for PDBC. Their correlation of 0.84 suggests significant overlap in exposure. CMDY charges 0.28%/yr vs 0.58%/yr for PDBC.
Performance
CMDY vs. PDBC - Performance Comparison
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Returns By Period
In the year-to-date period, CMDY achieves a 25.44% return, which is significantly lower than PDBC's 36.23% return.
CMDY
- 1D
- 0.02%
- 1M
- -2.52%
- YTD
- 25.44%
- 6M
- 24.53%
- 1Y
- 37.10%
- 3Y*
- 15.48%
- 5Y*
- 10.71%
- 10Y*
- —
PDBC
- 1D
- 0.39%
- 1M
- -3.37%
- YTD
- 36.23%
- 6M
- 36.27%
- 1Y
- 45.46%
- 3Y*
- 14.42%
- 5Y*
- 12.39%
- 10Y*
- 8.79%
CMDY vs. PDBC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
CMDY iShares Bloomberg Roll Select Commodity Strategy ETF | 25.44% | 15.81% | 5.43% | -9.33% | 14.55% | 26.38% | 1.15% | 4.96% | -11.11% |
PDBC Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF | 36.23% | 5.96% | 2.09% | -6.25% | 19.23% | 41.72% | -7.84% | 11.44% | -13.76% |
Correlation
The correlation between CMDY and PDBC is 0.91, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.91 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.89 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.88 |
Correlation (All Time) Calculated using the full available price history since Apr 6, 2018 | 0.84 |
The correlation between CMDY and PDBC has been stable across timeframes, ranging from 0.84 to 0.91 - a consistent structural relationship.
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Return for Risk
CMDY vs. PDBC — Risk / Return Rank
CMDY
PDBC
CMDY vs. PDBC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Bloomberg Roll Select Commodity Strategy ETF (CMDY) and Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF (PDBC). 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.
| CMDY | PDBC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.13 | ||
| Sortino ratioReturn per unit of downside risk | -0.21 | ||
| Omega ratioGain probability vs. loss probability | 1.42 | 1.43 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 4.82 | 6.35 | -1.53 |
| Martin ratioReturn relative to average drawdown | 14.50 | 13.39 | +1.11 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| CMDY | PDBC | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.32 | 2.46 | -0.13 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.68 | 0.65 | +0.03 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.50 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.56 | 0.23 | +0.33 |
Drawdowns
CMDY vs. PDBC - Drawdown Comparison
The maximum CMDY drawdown since its inception was -31.19%, smaller than the maximum PDBC drawdown of -49.52%. Use the drawdown chart below to compare losses from any high point for CMDY and PDBC.
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Drawdown Indicators
| CMDY | PDBC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -31.19% | -49.52% | +18.33% |
Max Drawdown (1Y)Largest decline over 1 year | -7.73% | -7.19% | -0.54% |
Max Drawdown (3Y)Largest decline over 3 years | -10.08% | -13.95% | +3.87% |
Max Drawdown (5Y)Largest decline over 5 years | -26.56% | -27.63% | +1.07% |
Max Drawdown (10Y)Largest decline over 10 years | — | -40.73% | — |
Current DrawdownCurrent decline from peak | -3.97% | -4.55% | +0.58% |
Average DrawdownAverage peak-to-trough decline | -13.14% | -23.21% | +10.07% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.57% | 3.41% | -0.84% |
Volatility
CMDY vs. PDBC - Volatility Comparison
The current volatility for iShares Bloomberg Roll Select Commodity Strategy ETF (CMDY) is 5.04%, while Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF (PDBC) has a volatility of 6.20%. This indicates that CMDY experiences smaller price fluctuations and is considered to be less risky than PDBC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CMDY | PDBC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.04% | 6.20% | -1.16% |
Volatility (6M)Calculated over the trailing 6-month period | 14.20% | 15.78% | -1.58% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.06% | 18.61% | -2.55% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.80% | 19.12% | -3.32% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.63% | 17.78% | -3.15% |
CMDY vs. PDBC - Expense Ratio Comparison
CMDY has a 0.28% expense ratio, which is lower than PDBC's 0.58% expense ratio.
Dividends
CMDY vs. PDBC - Dividend Comparison
CMDY's dividend yield for the trailing twelve months is around 10.28%, more than PDBC's 2.82% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
CMDY iShares Bloomberg Roll Select Commodity Strategy ETF | 10.28% | 12.89% | 4.23% | 5.10% | 3.98% | 16.09% | 0.15% | 2.21% | 1.73% | 0.00% | 0.00% |
PDBC Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF | 2.82% | 3.84% | 4.42% | 4.21% | 13.05% | 50.83% | 0.01% | 1.40% | 1.00% | 3.83% | 6.51% |
Frequently Asked Questions
With a correlation of 0.91, CMDY and PDBC move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
PDBC has higher volatility (6.20%) compared to CMDY (5.04%). In terms of maximum drawdown, CMDY dropped -31.19% vs PDBC's -49.52%.
On 5-year performance, PDBC leads with 12.39% vs 10.71% for CMDY. On fees, CMDY is cheaper at 0.28% per year. On volatility, CMDY has been the lower-risk option at 5.04%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, PDBC has performed better with a 12.39% return vs 10.71%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
CMDY is cheaper with a 0.28% expense ratio, compared with 0.58% for PDBC.
CMDY has the higher dividend yield at 10.28%, compared with 2.82% for PDBC.
They also come from different issuers: iShares and Invesco. Their fees differ too: 0.28% for CMDY and 0.58% for PDBC.
PDBC currently has the higher Sharpe Ratio (2.46 vs 2.32), 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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