IEO vs. TNGY
IEO (iShares U.S. Oil & Gas Exploration & Production ETF) and TNGY (Tortoise Energy Fund) are both Energy Equities funds. IEO is passively managed, while TNGY is actively managed. A 0.69 correlation means they provide meaningful diversification when combined. IEO charges 0.42%/yr vs 0.85%/yr for TNGY.
Performance
IEO vs. TNGY - Performance Comparison
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Returns By Period
In the year-to-date period, IEO achieves a 34.59% return, which is significantly higher than TNGY's 15.21% return.
IEO
- 1D
- 1.66%
- 1M
- -3.23%
- YTD
- 34.59%
- 6M
- 26.42%
- 1Y
- 40.11%
- 3Y*
- 16.01%
- 5Y*
- 18.96%
- 10Y*
- 10.42%
TNGY
- 1D
- 0.39%
- 1M
- -3.15%
- YTD
- 15.21%
- 6M
- 12.60%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
IEO vs. TNGY - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
IEO iShares U.S. Oil & Gas Exploration & Production ETF | 34.59% | -2.16% |
TNGY Tortoise Energy Fund | 15.21% | 1.81% |
Correlation
The correlation between IEO and TNGY is 0.69, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Jun 17, 2025 | 0.69 |
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Return for Risk
IEO vs. TNGY — Risk / Return Rank
IEO
TNGY
IEO vs. TNGY - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares U.S. Oil & Gas Exploration & Production ETF (IEO) and Tortoise Energy Fund (TNGY). 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.
| IEO | TNGY | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | 1.26 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 2.82 | — | — |
| Martin ratioReturn relative to average drawdown | 7.63 | — | — |
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
| IEO | TNGY | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.61 | — | — |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.62 | — | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.30 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.17 | 1.15 | -0.99 |
Drawdowns
IEO vs. TNGY - Drawdown Comparison
The maximum IEO drawdown since its inception was -79.17%, which is greater than TNGY's maximum drawdown of -8.86%. Use the drawdown chart below to compare losses from any high point for IEO and TNGY.
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Drawdown Indicators
| IEO | TNGY | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -79.17% | -8.86% | -70.31% |
Max Drawdown (1Y)Largest decline over 1 year | -14.30% | — | — |
Max Drawdown (3Y)Largest decline over 3 years | -31.46% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -31.46% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -75.00% | — | — |
Current DrawdownCurrent decline from peak | -7.30% | -3.92% | -3.38% |
Average DrawdownAverage peak-to-trough decline | -26.27% | -2.18% | -24.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.28% | — | — |
Volatility
IEO vs. TNGY - Volatility Comparison
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Volatility by Period
| IEO | TNGY | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.32% | — | — |
Volatility (6M)Calculated over the trailing 6-month period | 19.86% | — | — |
Volatility (1Y)Calculated over the trailing 1-year period | 25.15% | 15.70% | +9.45% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 30.54% | 15.70% | +14.84% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 35.00% | 15.70% | +19.30% |
IEO vs. TNGY - Expense Ratio Comparison
IEO has a 0.42% expense ratio, which is lower than TNGY's 0.85% expense ratio.
Dividends
IEO vs. TNGY - Dividend Comparison
IEO's dividend yield for the trailing twelve months is around 1.97%, less than TNGY's 3.41% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IEO iShares U.S. Oil & Gas Exploration & Production ETF | 1.97% | 2.61% | 2.63% | 3.00% | 3.77% | 2.62% | 3.17% | 1.85% | 1.67% | 0.94% | 0.98% | 2.03% |
TNGY Tortoise Energy Fund | 3.41% | 2.59% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
IEO and TNGY have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, IEO is cheaper at 0.42% per year. The better choice depends on whether you care most about return, fees, risk, or income.
IEO is cheaper with a 0.42% expense ratio, compared with 0.85% for TNGY.
TNGY has the higher dividend yield at 3.41%, compared with 1.97% for IEO.
They also come from different issuers: iShares and Tortoise Capital. Their fees differ too: 0.42% for IEO and 0.85% for TNGY.
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