SPYGX vs. FMDGX

Last updated Jul 21, 2026

SPYGX (Spyglass Growth Fund) and FMDGX (Fidelity Mid Cap Growth Index Fund) are both Mid Cap Growth Equities funds. Over the past 5 years, SPYGX returned 0.06%/yr vs 5.27%/yr for FMDGX. Their correlation of 0.89 suggests significant overlap in exposure. SPYGX charges 1.05%/yr vs 0.05%/yr for FMDGX.

Performance

SPYGX vs. FMDGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Spyglass Growth Fund (SPYGX) and Fidelity Mid Cap Growth Index Fund (FMDGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPYGX achieves a -8.18% return, which is significantly lower than FMDGX's 0.83% return.

SPYGX

• 1D: -1.66%
• 1M: 2.06%
• 6M: -6.97%
• YTD: -8.18%
• 1Y: 1.81%
• 3Y*: 19.14%
• 5Y*: 0.06%
• 10Y*: —

FMDGX

• 1D: -0.51%
• 1M: -2.99%
• 6M: -2.32%
• YTD: 0.83%
• 1Y: -1.61%
• 3Y*: 11.78%
• 5Y*: 5.27%
• 10Y*: —

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

SPYGX vs. FMDGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
SPYGX Spyglass Growth Fund	-8.18%	15.74%	38.10%	54.03%	-47.17%	-11.45%	61.87%	3.93%
FMDGX Fidelity Mid Cap Growth Index Fund	0.83%	8.60%	22.03%	25.79%	-26.67%	12.67%	34.84%	4.63%

Correlation

The correlation between SPYGX and FMDGX is 0.81, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.89
Correlation (All Time) Calculated using the full available price history since Jul 17, 2019	0.89

The correlation between SPYGX and FMDGX has been stable across timeframes, ranging from 0.81 to 0.89 - a consistent structural relationship.

Return for Risk

SPYGX vs. FMDGX — Risk / Return Rank

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

SPYGX

SPYGX Risk / Return Rank: 4
SPYGX Sharpe Ratio Rank: 4
SPYGX Sortino Ratio Rank: 4
SPYGX Omega Ratio Rank: 4
SPYGX Calmar Ratio Rank: 4
SPYGX Martin Ratio Rank: 4

FMDGX

FMDGX Risk / Return Rank: 3
FMDGX Sharpe Ratio Rank: 3
FMDGX Sortino Ratio Rank: 3
FMDGX Omega Ratio Rank: 3
FMDGX Calmar Ratio Rank: 3
FMDGX Martin Ratio Rank: 3

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.

SPYGX vs. FMDGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Spyglass Growth Fund (SPYGX) and Fidelity Mid Cap Growth Index Fund (FMDGX). 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.

	SPYGX	FMDGX	Difference
Sharpe ratio: Return per unit of total volatility	0.09	-0.06	+0.15
Sortino ratio: Return per unit of downside risk	0.31	0.04	+0.27
Omega ratio: Gain probability vs. loss probability	1.04	1.00	+0.03
Calmar ratio: Return relative to maximum drawdown	0.08	-0.07	+0.15
Martin ratio: Return relative to average drawdown	0.18	-0.20	+0.38

SPYGX vs. FMDGX - Sharpe Ratio Comparison

The current SPYGX Sharpe Ratio is 0.09, which is higher than the FMDGX Sharpe Ratio of -0.06. The chart below compares the historical Sharpe Ratios of SPYGX and FMDGX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

SPYGX vs. FMDGX - Drawdown Comparison

The maximum SPYGX drawdown since its inception was -60.08%, which is greater than FMDGX's maximum drawdown of -38.59%. Use the drawdown chart below to compare losses from any high point for SPYGX and FMDGX.

Drawdown Indicators

	SPYGX	FMDGX	Difference
Max Drawdown Largest peak-to-trough decline	-60.08%	-38.59%	-21.49%
Max Drawdown (1Y) Largest decline over 1 year	-30.05%	-14.75%	-15.30%
Max Drawdown (3Y) Largest decline over 3 years	-32.90%	-25.30%	-7.60%
Max Drawdown (5Y) Largest decline over 5 years	-59.08%	-38.59%	-20.49%
Current Drawdown Current decline from peak	-11.78%	-5.98%	-5.80%
Average Drawdown Average peak-to-trough decline	-19.55%	-11.05%	-8.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.12%	5.16%	+7.96%

Volatility

SPYGX vs. FMDGX - Volatility Comparison

Spyglass Growth Fund (SPYGX) has a higher volatility of 6.57% compared to Fidelity Mid Cap Growth Index Fund (FMDGX) at 5.15%. This indicates that SPYGX's price experiences larger fluctuations and is considered to be riskier than FMDGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPYGX	FMDGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.57%	5.15%	+1.42%
Volatility (6M) Calculated over the trailing 6-month period	21.93%	13.83%	+8.10%
Volatility (1Y) Calculated over the trailing 1-year period	26.68%	17.36%	+9.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.75%	22.52%	+8.23%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	29.20%	24.25%	+4.95%

SPYGX vs. FMDGX - Expense Ratio Comparison

SPYGX has a 1.05% expense ratio, which is higher than FMDGX's 0.05% expense ratio.

Dividends

SPYGX vs. FMDGX - Dividend Comparison

SPYGX has not paid dividends to shareholders, while FMDGX's dividend yield for the trailing twelve months is around 1.84%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
FMDGX Fidelity Mid Cap Growth Index Fund	1.84%	1.85%	0.47%	0.63%	0.81%	6.43%	0.36%	0.29%	0.00%
SPYGX Spyglass Growth Fund	0.00%	0.00%	0.00%	0.00%	0.06%	10.07%	2.71%	0.25%	4.95%

Frequently Asked Questions

Can I hold both SPYGX and FMDGX in my portfolio?

SPYGX and FMDGX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPYGX or FMDGX?

SPYGX has higher volatility (6.57%) compared to FMDGX (5.15%). In terms of maximum drawdown, SPYGX dropped -60.08% vs FMDGX's -38.59%.

Which has better risk-adjusted returns?

SPYGX currently has the higher Sharpe Ratio (0.09 vs -0.06), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.