FNKFX vs. ATGAX

Last updated Jun 26, 2026

FNKFX (Fidelity Mid-Cap Stock K6 Fund) and ATGAX (Aquila Opportunity Growth Fund) are both Mid Cap Blend Equities funds. Their correlation of 0.86 suggests significant overlap in exposure. FNKFX charges 0.52%/yr vs 1.50%/yr for ATGAX.

Performance

FNKFX vs. ATGAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Mid-Cap Stock K6 Fund (FNKFX) and Aquila Opportunity Growth Fund (ATGAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

FNKFX

• 1D: 0.56%
• 1M: 1.41%
• YTD: 18.02%
• 6M: 15.56%
• 1Y: 29.76%
• 3Y*: 20.87%
• 5Y*: 12.13%
• 10Y*: —

ATGAX

• 1D: 0.17%
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

FNKFX vs. ATGAX - Yearly Performance Comparison

	2026 (YTD)
FNKFX Fidelity Mid-Cap Stock K6 Fund	2.01%
ATGAX Aquila Opportunity Growth Fund	1.44%

Correlation

The correlation between FNKFX and ATGAX is 0.86, 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	0.86

Return for Risk

FNKFX vs. ATGAX — Risk / Return Rank

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

FNKFX

FNKFX Risk / Return Rank: 64
FNKFX Sharpe Ratio Rank: 53
FNKFX Sortino Ratio Rank: 54
FNKFX Omega Ratio Rank: 48
FNKFX Calmar Ratio Rank: 83
FNKFX Martin Ratio Rank: 82

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.

FNKFX vs. ATGAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Mid-Cap Stock K6 Fund (FNKFX) 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.

	FNKFX	ATGAX	Difference
Sharpe ratio: Return per unit of total volatility	1.77	—	—
Sortino ratio: Return per unit of downside risk	2.51	—	—
Omega ratio: Gain probability vs. loss probability	1.31	—	—
Calmar ratio: Return relative to maximum drawdown	3.36	—	—
Martin ratio: Return relative to average drawdown	12.86	—	—

Drawdowns

FNKFX vs. ATGAX - Drawdown Comparison

The maximum FNKFX drawdown since its inception was -41.25%, which is greater than ATGAX's maximum drawdown of -3.70%. Use the drawdown chart below to compare losses from any high point for FNKFX and ATGAX.

Drawdown Indicators

	FNKFX	ATGAX	Difference
Max Drawdown Largest peak-to-trough decline	-41.25%	-3.70%	-37.55%
Max Drawdown (1Y) Largest decline over 1 year	-8.67%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-21.86%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-21.86%	—	—
Current Drawdown Current decline from peak	-0.80%	-1.92%	+1.12%
Average Drawdown Average peak-to-trough decline	-4.95%	-1.05%	-3.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.26%	—	—

Volatility

Volatility by Period

	FNKFX	ATGAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.74%	—	—
Volatility (6M) Calculated over the trailing 6-month period	13.10%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	16.49%	19.93%	-3.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.91%	19.93%	-1.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.96%	19.93%	+2.03%

FNKFX vs. ATGAX - Expense Ratio Comparison

FNKFX has a 0.52% expense ratio, which is lower than ATGAX's 1.50% expense ratio.

Dividends

FNKFX vs. ATGAX - Dividend Comparison

FNKFX's dividend yield for the trailing twelve months is around 3.88%, while ATGAX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
ATGAX Aquila Opportunity Growth Fund	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FNKFX Fidelity Mid-Cap Stock K6 Fund	3.88%	0.59%	12.35%	0.99%	2.91%	4.03%	1.45%	0.52%

Frequently Asked Questions

Can I hold both FNKFX and ATGAX in my portfolio?

FNKFX and ATGAX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.