GRN vs. PDBC
GRN (iPath Series B Carbon ETN) and PDBC (Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF) are both Commodities funds. GRN is passively managed, while PDBC is actively managed. Over the past 5 years, GRN returned 9.52%/yr vs 12.39%/yr for PDBC. At a 0.12 correlation, their price movements are largely independent. GRN charges 0.75%/yr vs 0.58%/yr for PDBC.
Performance
GRN vs. PDBC - Performance Comparison
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Returns By Period
In the year-to-date period, GRN achieves a -8.60% return, which is significantly lower than PDBC's 36.23% return.
GRN
- 1D
- -0.42%
- 1M
- 8.55%
- YTD
- -8.60%
- 6M
- -4.48%
- 1Y
- 9.03%
- 3Y*
- 0.39%
- 5Y*
- 9.52%
- 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%
GRN vs. PDBC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|---|---|
GRN iPath Series B Carbon ETN | -8.60% | 20.33% | -7.34% | -2.99% | -0.07% | 147.21% | 30.47% | -8.41% |
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% | 5.75% |
Correlation
The correlation between GRN and PDBC is -0.05, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | -0.05 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.03 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.05 |
Correlation (All Time) Calculated using the full available price history since Sep 11, 2019 | 0.12 |
The correlation between GRN and PDBC shifts across timeframes, from -0.05 (1 year) to 0.12 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
GRN vs. PDBC — Risk / Return Rank
GRN
PDBC
GRN vs. PDBC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iPath Series B Carbon ETN (GRN) 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.
| GRN | PDBC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -2.13 | ||
| Sortino ratioReturn per unit of downside risk | -2.53 | ||
| Omega ratioGain probability vs. loss probability | 1.08 | 1.43 | -0.35 |
| Calmar ratioReturn relative to maximum drawdown | 0.30 | 6.35 | -6.05 |
| Martin ratioReturn relative to average drawdown | 0.77 | 13.39 | -12.62 |
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
| GRN | PDBC | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.33 | 2.46 | -2.13 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.24 | 0.65 | -0.41 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.50 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.42 | 0.23 | +0.18 |
Drawdowns
GRN vs. PDBC - Drawdown Comparison
The maximum GRN drawdown since its inception was -47.96%, roughly equal to the maximum PDBC drawdown of -49.52%. Use the drawdown chart below to compare losses from any high point for GRN and PDBC.
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Drawdown Indicators
| GRN | PDBC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -47.96% | -49.52% | +1.56% |
Max Drawdown (1Y)Largest decline over 1 year | -30.39% | -7.19% | -23.20% |
Max Drawdown (3Y)Largest decline over 3 years | -45.30% | -13.95% | -31.35% |
Max Drawdown (5Y)Largest decline over 5 years | -47.96% | -27.63% | -20.33% |
Max Drawdown (10Y)Largest decline over 10 years | — | -40.73% | — |
Current DrawdownCurrent decline from peak | -19.73% | -4.55% | -15.18% |
Average DrawdownAverage peak-to-trough decline | -17.54% | -23.21% | +5.67% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 11.83% | 3.41% | +8.42% |
Volatility
GRN vs. PDBC - Volatility Comparison
iPath Series B Carbon ETN (GRN) has a higher volatility of 6.65% compared to Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF (PDBC) at 6.20%. This indicates that GRN's price experiences larger fluctuations and is considered to be riskier 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
| GRN | PDBC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.65% | 6.20% | +0.45% |
Volatility (6M)Calculated over the trailing 6-month period | 24.47% | 15.78% | +8.69% |
Volatility (1Y)Calculated over the trailing 1-year period | 27.74% | 18.61% | +9.13% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 39.82% | 19.12% | +20.70% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 41.95% | 17.78% | +24.17% |
GRN vs. PDBC - Expense Ratio Comparison
GRN has a 0.75% expense ratio, which is higher than PDBC's 0.58% expense ratio.
Dividends
GRN vs. PDBC - Dividend Comparison
GRN has not paid dividends to shareholders, while PDBC's dividend yield for the trailing twelve months is around 2.82%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
GRN iPath Series B Carbon ETN | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 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
GRN and PDBC have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
GRN has higher volatility (6.65%) compared to PDBC (6.20%). In terms of maximum drawdown, GRN dropped -47.96% vs PDBC's -49.52%.
On 5-year performance, PDBC leads with 12.39% vs 9.52% for GRN. On fees, PDBC is cheaper at 0.58% per year. On volatility, PDBC has been the lower-risk option at 6.20%. 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 9.52%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
PDBC is cheaper with a 0.58% expense ratio, compared with 0.75% for GRN.
PDBC has the higher dividend yield at 2.82%, compared with 0.00% for GRN.
They also come from different issuers: Barclays Capital and Invesco. Their fees differ too: 0.75% for GRN and 0.58% for PDBC.
PDBC currently has the higher Sharpe Ratio (2.46 vs 0.33), 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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