TBLU vs. COMT
TBLU (Tortoise Global Water Fund) and COMT (iShares GSCI Commodity Dynamic Roll Strategy ETF) are both exchange-traded funds - TBLU is a Water Equities fund tracking the Tortoise Global Water ESG Net Total Return Index, while COMT is a Commodities fund tracking the S&P GSCI Dynamic Roll (USD) Total Return Index. Both are passively managed. Over the past 5 years, TBLU returned 4.57%/yr vs 10.23%/yr for COMT. At a 0.16 correlation, their price movements are largely independent. TBLU charges 0.40%/yr vs 0.48%/yr for COMT.
Performance
TBLU vs. COMT - Performance Comparison
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Returns By Period
In the year-to-date period, TBLU achieves a 0.68% return, which is significantly lower than COMT's 20.95% return.
TBLU
- 1D
- 1.53%
- 1M
- 2.43%
- YTD
- 0.68%
- 6M
- -0.89%
- 1Y
- -0.00%
- 3Y*
- 10.25%
- 5Y*
- 4.57%
- 10Y*
- —
COMT
- 1D
- -2.37%
- 1M
- -14.00%
- YTD
- 20.95%
- 6M
- 19.91%
- 1Y
- 25.37%
- 3Y*
- 11.11%
- 5Y*
- 10.23%
- 10Y*
- 7.70%
TBLU vs. COMT - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TBLU Tortoise Global Water Fund | 0.68% | 11.82% | 8.54% | 20.95% | -25.99% | 28.93% | 15.74% | 38.72% | -12.80% | 20.81% |
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF | 20.95% | 6.07% | 5.96% | -6.56% | 19.45% | 36.88% | -18.66% | 10.81% | -6.67% | 9.65% |
Correlation
The correlation between TBLU and COMT is -0.28, 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 | -0.28 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.03 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.07 |
Correlation (All Time) Calculated using the full available price history since Feb 15, 2017 | 0.16 |
The correlation between TBLU and COMT shifts across timeframes, from -0.28 (1 year) to 0.16 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
TBLU vs. COMT — Risk / Return Rank
TBLU
COMT
TBLU vs. COMT - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Tortoise Global Water Fund (TBLU) and iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT). 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.
| TBLU | COMT | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.21 | ||
| Sortino ratioReturn per unit of downside risk | -1.62 | ||
| Omega ratioGain probability vs. loss probability | 1.01 | 1.22 | -0.21 |
| Calmar ratioReturn relative to maximum drawdown | -0.00 | 1.45 | -1.45 |
| Martin ratioReturn relative to average drawdown | -0.00 | 6.71 | -6.71 |
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Drawdowns
TBLU vs. COMT - Drawdown Comparison
The maximum TBLU drawdown since its inception was -37.58%, smaller than the maximum COMT drawdown of -51.89%. Use the drawdown chart below to compare losses from any high point for TBLU and COMT.
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Drawdown Indicators
| TBLU | COMT | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -37.58% | -51.89% | +14.31% |
Max Drawdown (1Y)Largest decline over 1 year | -13.17% | -17.57% | +4.40% |
Max Drawdown (3Y)Largest decline over 3 years | -15.42% | -17.57% | +2.15% |
Max Drawdown (5Y)Largest decline over 5 years | -35.36% | -29.00% | -6.36% |
Max Drawdown (10Y)Largest decline over 10 years | — | -39.22% | — |
Current DrawdownCurrent decline from peak | -9.24% | -17.57% | +8.33% |
Average DrawdownAverage peak-to-trough decline | -8.16% | -24.00% | +15.84% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.00% | 3.79% | +2.21% |
Volatility
TBLU vs. COMT - Volatility Comparison
The current volatility for Tortoise Global Water Fund (TBLU) is 4.59%, while iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT) has a volatility of 5.32%. This indicates that TBLU experiences smaller price fluctuations and is considered to be less risky than COMT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TBLU | COMT | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.59% | 5.32% | -0.73% |
Volatility (6M)Calculated over the trailing 6-month period | 11.88% | 19.40% | -7.52% |
Volatility (1Y)Calculated over the trailing 1-year period | 14.71% | 21.28% | -6.57% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.36% | 21.15% | -3.79% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.95% | 18.87% | +0.08% |
TBLU vs. COMT - Expense Ratio Comparison
TBLU has a 0.40% expense ratio, which is lower than COMT's 0.48% expense ratio.
Dividends
TBLU vs. COMT - Dividend Comparison
TBLU's dividend yield for the trailing twelve months is around 3.28%, less than COMT's 6.40% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF | 6.40% | 7.74% | 4.90% | 5.19% | 29.79% | 17.79% | 0.36% | 2.61% | 11.65% | 5.16% | 0.52% | 1.44% |
TBLU Tortoise Global Water Fund | 3.28% | 3.31% | 1.34% | 1.46% | 1.64% | 1.55% | 1.42% | 1.58% | 1.35% | 1.32% | 0.00% | 0.00% |
Frequently Asked Questions
TBLU and COMT have a correlation of -0.28, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
COMT has higher volatility (5.32%) compared to TBLU (4.59%). In terms of maximum drawdown, TBLU dropped -37.58% vs COMT's -51.89%.
On 5-year performance, COMT leads with 10.23% vs 4.57% for TBLU. On fees, TBLU is cheaper at 0.40% per year. On volatility, TBLU has been the lower-risk option at 4.59%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, COMT has performed better with a 10.23% return vs 4.57%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
TBLU is cheaper with a 0.40% expense ratio, compared with 0.48% for COMT.
COMT has the higher dividend yield at 6.40%, compared with 3.28% for TBLU.
TBLU is categorized as Water Equities, while COMT is Commodities. TBLU tracks Tortoise Global Water ESG Net Total Return Index, while COMT tracks S&P GSCI Dynamic Roll (USD) Total Return Index. They also come from different issuers: Tortoise and iShares. Their fees differ too: 0.40% for TBLU and 0.48% for COMT.
COMT currently has the higher Sharpe Ratio (1.21 vs -0.00), 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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