PEMGX vs. ATGAX

Last updated Jun 27, 2026

PEMGX (Principal MidCap Fund Class A) and ATGAX (Aquila Opportunity Growth Fund) are both Mid Cap Blend Equities funds. At a 0.23 correlation, their price movements are largely independent. PEMGX charges 0.91%/yr vs 1.50%/yr for ATGAX.

Performance

PEMGX vs. ATGAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal MidCap Fund Class A (PEMGX) and Aquila Opportunity Growth Fund (ATGAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

PEMGX

• 1D: 0.37%
• 1M: 2.69%
• YTD: -6.16%
• 6M: -7.75%
• 1Y: -8.82%
• 3Y*: 9.81%
• 5Y*: 4.39%
• 10Y*: 12.40%

ATGAX

• 1D: 1.14%
• 1M: 2.60%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

PEMGX vs. ATGAX - Yearly Performance Comparison

	2026 (YTD)
PEMGX Principal MidCap Fund Class A	2.69%
ATGAX Aquila Opportunity Growth Fund	2.60%

Correlation

The correlation between PEMGX and ATGAX is 0.23, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 28, 2026	0.23

Return for Risk

PEMGX vs. ATGAX — Risk / Return Rank

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

PEMGX

PEMGX Risk / Return Rank: 1
PEMGX Sharpe Ratio Rank: 1
PEMGX Sortino Ratio Rank: 1
PEMGX Omega Ratio Rank: 1
PEMGX Calmar Ratio Rank: 1
PEMGX Martin Ratio Rank: 1

ATGAX

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

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.

PEMGX vs. ATGAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal MidCap Fund Class A (PEMGX) and Aquila Opportunity Growth Fund (ATGAX). 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.

	PEMGX	ATGAX	Difference
Sharpe ratio: Return per unit of total volatility	-0.55	—	—
Sortino ratio: Return per unit of downside risk	-0.70	—	—
Omega ratio: Gain probability vs. loss probability	0.92	—	—
Calmar ratio: Return relative to maximum drawdown	-0.41	—	—
Martin ratio: Return relative to average drawdown	-0.86	—	—

Drawdowns

PEMGX vs. ATGAX - Drawdown Comparison

The maximum PEMGX drawdown since its inception was -84.41%, which is greater than ATGAX's maximum drawdown of -3.70%. Use the drawdown chart below to compare losses from any high point for PEMGX and ATGAX.

Drawdown Indicators

	PEMGX	ATGAX	Difference
Max Drawdown Largest peak-to-trough decline	-84.41%	-3.70%	-80.71%
Max Drawdown (1Y) Largest decline over 1 year	-19.38%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-19.38%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-31.34%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-40.58%	—	—
Current Drawdown Current decline from peak	-12.36%	-0.80%	-11.56%
Average Drawdown Average peak-to-trough decline	-33.24%	-1.03%	-32.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.35%	—	—

Volatility

Volatility by Period

	PEMGX	ATGAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.43%	—	—
Volatility (6M) Calculated over the trailing 6-month period	11.64%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	14.62%	19.76%	-5.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.71%	19.76%	-1.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.14%	19.76%	-0.62%

PEMGX vs. ATGAX - Expense Ratio Comparison

PEMGX has a 0.91% expense ratio, which is lower than ATGAX's 1.50% expense ratio.

Dividends

PEMGX vs. ATGAX - Dividend Comparison

PEMGX's dividend yield for the trailing twelve months is around 6.51%, while ATGAX has not paid dividends to shareholders.

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%
PEMGX Principal MidCap Fund Class A	6.51%	6.11%	6.55%	2.58%	3.31%	8.24%	1.12%	9.02%	12.48%	3.32%	2.25%	6.28%

Frequently Asked Questions

Can I hold both PEMGX and ATGAX in my portfolio?

PEMGX and ATGAX have a correlation of 0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.