GASFX vs. IAUM

Last updated Apr 1, 2026

Compare and contrast key facts about Hennessy Gas Utility Fund (GASFX) and iShares Gold Trust Micro (IAUM).

GASFX is managed by Hennessy. It was launched on May 9, 1989. IAUM is a passively managed fund by iShares that tracks the performance of the LBMA Gold Price. It was launched on Jun 15, 2021.

Performance

GASFX vs. IAUM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Hennessy Gas Utility Fund (GASFX) and iShares Gold Trust Micro (IAUM). The values are adjusted to include any dividend payments, if applicable.

GASFX vs. IAUM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
GASFX Hennessy Gas Utility Fund	14.24%	10.42%	24.98%	0.27%	13.68%	8.19%
IAUM iShares Gold Trust Micro	8.63%	64.27%	27.04%	13.12%	-0.49%	3.87%

Returns By Period

In the year-to-date period, GASFX achieves a 14.24% return, which is significantly higher than IAUM's 8.63% return.

GASFX

• 1D: 0.17%
• 1M: 0.60%
• YTD: 14.24%
• 6M: 11.75%
• 1Y: 17.55%
• 3Y*: 16.83%
• 5Y*: 14.84%
• 10Y*: 10.14%

IAUM

• 1D: 3.78%
• 1M: -11.00%
• YTD: 8.63%
• 6M: 21.30%
• 1Y: 49.82%
• 3Y*: 33.36%
• 5Y*: —
• 10Y*: —

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

GASFX vs. IAUM - Expense Ratio Comparison

GASFX has a 1.00% expense ratio, which is higher than IAUM's 0.09% expense ratio.

GASFX

Hennessy Gas Utility Fund

IAUM

iShares Gold Trust Micro

Return for Risk

GASFX vs. IAUM — Risk / Return Rank

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

GASFX

GASFX Risk / Return Rank: 77
GASFX Sharpe Ratio Rank: 76
GASFX Sortino Ratio Rank: 73
GASFX Omega Ratio Rank: 68
GASFX Calmar Ratio Rank: 87
GASFX Martin Ratio Rank: 83

IAUM

IAUM Risk / Return Rank: 88
IAUM Sharpe Ratio Rank: 89
IAUM Sortino Ratio Rank: 87
IAUM Omega Ratio Rank: 86
IAUM Calmar Ratio Rank: 89
IAUM Martin Ratio Rank: 88

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.

GASFX vs. IAUM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Hennessy Gas Utility Fund (GASFX) and iShares Gold Trust Micro (IAUM). 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.

	GASFX	IAUM	Difference
Sharpe ratio Return per unit of total volatility	1.36	1.82	-0.46
Sortino ratio Return per unit of downside risk	1.80	2.26	-0.45
Omega ratio Gain probability vs. loss probability	1.25	1.33	-0.08
Calmar ratio Return relative to maximum drawdown	2.27	2.72	-0.45
Martin ratio Return relative to average drawdown	8.36	10.05	-1.69
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

GASFX vs. IAUM - Sharpe Ratio Comparison

The current GASFX Sharpe Ratio is 1.36, which is comparable to the IAUM Sharpe Ratio of 1.82. The chart below compares the historical Sharpe Ratios of GASFX and IAUM, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	GASFX	IAUM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.36	1.82	-0.46
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.97	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	1.29	-0.71

Correlation

The correlation between GASFX and IAUM is 0.22, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

GASFX vs. IAUM - Dividend Comparison

GASFX's dividend yield for the trailing twelve months is around 10.02%, while IAUM has not paid dividends to shareholders.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GASFX Hennessy Gas Utility Fund	10.02%	12.06%	7.36%	6.63%	15.49%	10.63%	10.93%	7.11%	12.31%	2.96%	3.52%	5.64%
IAUM iShares Gold Trust Micro	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

GASFX vs. IAUM - Drawdown Comparison

The maximum GASFX drawdown since its inception was -49.33%, which is greater than IAUM's maximum drawdown of -20.87%. Use the drawdown chart below to compare losses from any high point for GASFX and IAUM.

Drawdown Indicators

	GASFX	IAUM	Difference
Max Drawdown Largest peak-to-trough decline	-49.33%	-20.87%	-28.46%
Max Drawdown (1Y) Largest decline over 1 year	-8.47%	-19.15%	+10.68%
Max Drawdown (5Y) Largest decline over 5 years	-18.25%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-37.23%	—	—
Current Drawdown Current decline from peak	-0.23%	-13.18%	+12.95%
Average Drawdown Average peak-to-trough decline	-7.88%	-4.98%	-2.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.30%	5.18%	-2.88%

Volatility

GASFX vs. IAUM - Volatility Comparison

The current volatility for Hennessy Gas Utility Fund (GASFX) is 3.35%, while iShares Gold Trust Micro (IAUM) has a volatility of 10.97%. This indicates that GASFX experiences smaller price fluctuations and is considered to be less risky than IAUM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GASFX	IAUM	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.35%	10.97%	-7.62%
Volatility (6M) Calculated over the trailing 6-month period	7.85%	23.96%	-16.11%
Volatility (1Y) Calculated over the trailing 1-year period	13.69%	27.51%	-13.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.32%	17.78%	-2.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.63%	17.78%	-0.15%