TNGY vs. OIH

Last updated Jun 25, 2026

TNGY (Tortoise Energy Fund) and OIH (VanEck Oil Services ETF) are both Energy Equities funds. TNGY is actively managed, while OIH is passively managed. Over the past year, TNGY returned 11.35% vs 70.06% for OIH. A 0.51 correlation means they provide meaningful diversification when combined. TNGY charges 0.85%/yr vs 0.35%/yr for OIH.

Performance

TNGY vs. OIH - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Tortoise Energy Fund (TNGY) and VanEck Oil Services ETF (OIH). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TNGY achieves a 9.61% return, which is significantly lower than OIH's 33.63% return.

TNGY

• 1D: -1.11%
• 1M: -6.49%
• YTD: 9.61%
• 6M: 10.43%
• 1Y: 11.35%
• 3Y*: —
• 5Y*: —
• 10Y*: —

OIH

• 1D: 2.49%
• 1M: -14.14%
• YTD: 33.63%
• 6M: 34.54%
• 1Y: 70.06%
• 3Y*: 13.58%
• 5Y*: 12.29%
• 10Y*: -1.89%

*Multi-year figures are annualized to reflect compound growth (CAGR)

TNGY vs. OIH - Yearly Performance Comparison

	2026 (YTD)	2025
TNGY Tortoise Energy Fund	9.61%	-2.37%
OIH VanEck Oil Services ETF	33.63%	17.11%

Correlation

The correlation between TNGY and OIH is 0.51, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.51
Correlation (All Time) Calculated using the full available price history since Jun 16, 2025	0.51

The correlation between TNGY and OIH has been stable across timeframes, ranging from 0.51 to 0.51 - a consistent structural relationship.

Return for Risk

TNGY vs. OIH — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

TNGY

TNGY Risk / Return Rank: 23
TNGY Sharpe Ratio Rank: 22
TNGY Sortino Ratio Rank: 20
TNGY Omega Ratio Rank: 20
TNGY Calmar Ratio Rank: 26
TNGY Martin Ratio Rank: 27

OIH

OIH Risk / Return Rank: 80
OIH Sharpe Ratio Rank: 84
OIH Sortino Ratio Rank: 77
OIH Omega Ratio Rank: 71
OIH Calmar Ratio Rank: 83
OIH Martin Ratio Rank: 85

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

TNGY vs. OIH - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Tortoise Energy Fund (TNGY) and VanEck Oil Services ETF (OIH). 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.

	TNGY	OIH	Difference
Sharpe ratio: Return per unit of total volatility	0.71	2.33	-1.62
Sortino ratio: Return per unit of downside risk	1.03	2.98	-1.94
Omega ratio: Gain probability vs. loss probability	1.13	1.36	-0.24
Calmar ratio: Return relative to maximum drawdown	1.16	3.87	-2.70
Martin ratio: Return relative to average drawdown	3.37	15.42	-12.05

TNGY vs. OIH - Sharpe Ratio Comparison

The current TNGY Sharpe Ratio is 0.71, which is lower than the OIH Sharpe Ratio of 2.33. The chart below compares the historical Sharpe Ratios of TNGY and OIH, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TNGY vs. OIH - Drawdown Comparison

The maximum TNGY drawdown since its inception was -9.79%, smaller than the maximum OIH drawdown of -94.45%. Use the drawdown chart below to compare losses from any high point for TNGY and OIH.

Drawdown Indicators

	TNGY	OIH	Difference
Max Drawdown Largest peak-to-trough decline	-9.79%	-94.45%	+84.66%
Max Drawdown (1Y) Largest decline over 1 year	-9.79%	-18.21%	+8.42%
Max Drawdown (3Y) Largest decline over 3 years	—	-43.80%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-43.80%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-89.62%	—
Current Drawdown Current decline from peak	-8.58%	-66.11%	+57.53%
Average Drawdown Average peak-to-trough decline	-3.60%	-48.87%	+45.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.38%	4.56%	-1.18%

Volatility

TNGY vs. OIH - Volatility Comparison

The current volatility for Tortoise Energy Fund (TNGY) is 6.38%, while VanEck Oil Services ETF (OIH) has a volatility of 11.00%. This indicates that TNGY experiences smaller price fluctuations and is considered to be less risky than OIH based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TNGY	OIH	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.38%	11.00%	-4.62%
Volatility (6M) Calculated over the trailing 6-month period	12.83%	21.55%	-8.72%
Volatility (1Y) Calculated over the trailing 1-year period	16.05%	30.32%	-14.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.45%	36.83%	-20.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.45%	42.39%	-25.94%

TNGY vs. OIH - Expense Ratio Comparison

TNGY has a 0.85% expense ratio, which is higher than OIH's 0.35% expense ratio.

Dividends

TNGY vs. OIH - Dividend Comparison

TNGY's dividend yield for the trailing twelve months is around 3.59%, more than OIH's 1.28% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OIH VanEck Oil Services ETF	1.28%	1.71%	2.01%	1.36%	0.95%	0.98%	1.23%	2.10%	2.13%	2.60%	1.40%	2.39%
TNGY Tortoise Energy Fund	3.59%	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

Can I hold both TNGY and OIH in my portfolio?

TNGY and OIH have a correlation of 0.51, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TNGY or OIH?

OIH has higher volatility (11.00%) compared to TNGY (6.38%). In terms of maximum drawdown, TNGY dropped -9.79% vs OIH's -94.45%.

Which ETF is better, TNGY or OIH?

On 1-year performance, OIH leads with 70.06% vs 11.35% for TNGY. On fees, OIH is cheaper at 0.35% per year. On volatility, TNGY has been the lower-risk option at 6.38%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, TNGY or OIH?

Over the 1-year period, OIH has performed better with a 70.06% return vs 11.35%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, TNGY or OIH?

OIH is cheaper with a 0.35% expense ratio, compared with 0.85% for TNGY.

Which ETF pays a higher dividend yield, TNGY or OIH?

TNGY has the higher dividend yield at 3.59%, compared with 1.28% for OIH.

What is the main difference between TNGY and OIH?

They also come from different issuers: Tortoise Capital and VanEck. Their fees differ too: 0.85% for TNGY and 0.35% for OIH.

Which has better risk-adjusted returns?

OIH currently has the higher Sharpe Ratio (2.33 vs 0.71), 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.