ATGAX vs. IIRMX

Last updated Jul 14, 2026

ATGAX (Aquila Opportunity Growth Fund) and IIRMX (Voya Russell Mid Cap Index Portfolio) are both Mid Cap Blend Equities funds. Their correlation of 0.83 suggests significant overlap in exposure. ATGAX charges 1.50%/yr vs 0.40%/yr for IIRMX.

Performance

ATGAX vs. IIRMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Aquila Opportunity Growth Fund (ATGAX) and Voya Russell Mid Cap Index Portfolio (IIRMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

ATGAX

• 1D: 0.06%
• 1M: 1.26%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

IIRMX

• 1D: 0.00%
• 1M: 1.45%
• 6M: 14.63%
• YTD: 19.21%
• 1Y: 22.89%
• 3Y*: 16.80%
• 5Y*: 8.73%
• 10Y*: 11.49%

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

ATGAX vs. IIRMX - Yearly Performance Comparison

	2026 (YTD)
ATGAX Aquila Opportunity Growth Fund	3.45%
IIRMX Voya Russell Mid Cap Index Portfolio	3.41%

Correlation

The correlation between ATGAX and IIRMX is 0.83, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 28, 2026	0.83

Return for Risk

ATGAX vs. IIRMX — Risk / Return Rank

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

ATGAX

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

IIRMX

IIRMX Risk / Return Rank: 53
IIRMX Sharpe Ratio Rank: 28
IIRMX Sortino Ratio Rank: 34
IIRMX Omega Ratio Rank: 49
IIRMX Calmar Ratio Rank: 73
IIRMX Martin Ratio Rank: 80

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.

ATGAX vs. IIRMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Aquila Opportunity Growth Fund (ATGAX) and Voya Russell Mid Cap Index Portfolio (IIRMX). 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.

	ATGAX	IIRMX	Difference
Sharpe ratio: Return per unit of total volatility	—	1.12	—
Sortino ratio: Return per unit of downside risk	—	1.85	—
Omega ratio: Gain probability vs. loss probability	—	1.29	—
Calmar ratio: Return relative to maximum drawdown	—	2.64	—
Martin ratio: Return relative to average drawdown	—	11.30	—

Drawdowns

ATGAX vs. IIRMX - Drawdown Comparison

The maximum ATGAX drawdown since its inception was -3.70%, smaller than the maximum IIRMX drawdown of -56.44%. Use the drawdown chart below to compare losses from any high point for ATGAX and IIRMX.

Drawdown Indicators

	ATGAX	IIRMX	Difference
Max Drawdown Largest peak-to-trough decline	-3.70%	-56.44%	+52.74%
Max Drawdown (1Y) Largest decline over 1 year	—	-9.61%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-21.18%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-26.26%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-40.41%	—
Current Drawdown Current decline from peak	-0.11%	-0.55%	+0.44%
Average Drawdown Average peak-to-trough decline	-0.92%	-7.84%	+6.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	2.15%	—

Volatility

Volatility by Period

	ATGAX	IIRMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.38%	—
Volatility (6M) Calculated over the trailing 6-month period	—	19.48%	—
Volatility (1Y) Calculated over the trailing 1-year period	17.60%	22.53%	-4.93%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.60%	20.39%	-2.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.60%	20.33%	-2.73%

ATGAX vs. IIRMX - Expense Ratio Comparison

ATGAX has a 1.50% expense ratio, which is higher than IIRMX's 0.40% expense ratio.

Dividends

ATGAX vs. IIRMX - Dividend Comparison

ATGAX has not paid dividends to shareholders, while IIRMX's dividend yield for the trailing twelve months is around 37.01%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ATGAX Aquila Opportunity Growth Fund	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
IIRMX Voya Russell Mid Cap Index Portfolio	37.01%	13.19%	10.43%	11.78%	10.34%	10.34%	14.22%	20.78%	15.64%	8.09%	14.11%	10.13%

Frequently Asked Questions

Can I hold both ATGAX and IIRMX in my portfolio?

ATGAX and IIRMX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.