TNGY vs. ION

Last updated Jun 3, 2026

TNGY (Tortoise Energy Fund) and ION (Proshares S&P Global Core Battery Metals ETF) are both Energy Equities funds. TNGY is actively managed, while ION is passively managed. At a 0.02 correlation, their price movements are largely independent. TNGY charges 0.85%/yr vs 0.58%/yr for ION.

Performance

TNGY vs. ION - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Tortoise Energy Fund (TNGY) and Proshares S&P Global Core Battery Metals ETF (ION). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TNGY achieves a 14.76% return, which is significantly lower than ION's 17.80% return.

TNGY

• 1D: 1.58%
• 1M: -2.13%
• YTD: 14.76%
• 6M: 13.37%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

ION

• 1D: 1.13%
• 1M: -8.23%
• YTD: 17.80%
• 6M: 31.44%
• 1Y: 130.37%
• 3Y*: 20.20%
• 5Y*: —
• 10Y*: —

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

TNGY vs. ION - Yearly Performance Comparison

	2026 (YTD)	2025
TNGY Tortoise Energy Fund	14.76%	1.81%
ION Proshares S&P Global Core Battery Metals ETF	17.80%	85.69%

Correlation

The correlation between TNGY and ION is 0.02, 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 (All Time) Calculated using the full available price history since Jun 17, 2025	0.02

Return for Risk

TNGY vs. ION — Risk / Return Rank

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

ION

ION Risk / Return Rank: 86
ION Sharpe Ratio Rank: 93
ION Sortino Ratio Rank: 79
ION Omega Ratio Rank: 78
ION Calmar Ratio Rank: 90
ION Martin Ratio Rank: 89

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. ION - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Tortoise Energy Fund (TNGY) and Proshares S&P Global Core Battery Metals ETF (ION). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	TNGY	ION	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	3.47	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.13	0.42	+0.70

Drawdowns

TNGY vs. ION - Drawdown Comparison

The maximum TNGY drawdown since its inception was -8.86%, smaller than the maximum ION drawdown of -52.08%. Use the drawdown chart below to compare losses from any high point for TNGY and ION.

Drawdown Indicators

	TNGY	ION	Difference
Max Drawdown Largest peak-to-trough decline	-8.86%	-52.08%	+43.22%
Max Drawdown (1Y) Largest decline over 1 year	—	-23.30%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-46.47%	—
Current Drawdown Current decline from peak	-4.29%	-11.15%	+6.86%
Average Drawdown Average peak-to-trough decline	-2.17%	-23.71%	+21.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	6.53%	—

Volatility

Volatility by Period

	TNGY	ION	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	11.84%	—
Volatility (6M) Calculated over the trailing 6-month period	—	29.72%	—
Volatility (1Y) Calculated over the trailing 1-year period	15.73%	37.75%	-22.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.73%	31.05%	-15.32%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.73%	31.05%	-15.32%

TNGY vs. ION - Expense Ratio Comparison

TNGY has a 0.85% expense ratio, which is higher than ION's 0.58% expense ratio.

Dividends

TNGY vs. ION - Dividend Comparison

TNGY's dividend yield for the trailing twelve months is around 3.43%, more than ION's 1.35% yield.

Position	TTM	2025	2024	2023	2022
ION Proshares S&P Global Core Battery Metals ETF	1.35%	1.63%	1.74%	2.23%	0.13%
TNGY Tortoise Energy Fund	3.43%	2.59%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both TNGY and ION in my portfolio?

TNGY and ION have a correlation of 0.02, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, TNGY or ION?

On fees, ION is cheaper at 0.58% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, TNGY or ION?

ION is cheaper with a 0.58% expense ratio, compared with 0.85% for TNGY.

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

TNGY has the higher dividend yield at 3.43%, compared with 1.35% for ION.

What is the main difference between TNGY and ION?

They also come from different issuers: Tortoise Capital and ProShares. Their fees differ too: 0.85% for TNGY and 0.58% for ION.