MIGNX vs. MIGFX

Last updated Jun 4, 2026

MIGNX (MFS Massachusetts Investors Growth Stock Fund Class R6) and MIGFX (MFS Massachusetts Investors Growth Stock Fund) are both Large Cap Growth Equities funds from MFS. Over the past 10 years, MIGNX returned 14.98%/yr vs 14.65%/yr for MIGFX. With a 1.00 correlation, they move nearly in lockstep. MIGNX charges 0.37%/yr vs 0.70%/yr for MIGFX.

Performance

MIGNX vs. MIGFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Massachusetts Investors Growth Stock Fund Class R6 (MIGNX) and MFS Massachusetts Investors Growth Stock Fund (MIGFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MIGNX achieves a -0.18% return, which is significantly higher than MIGFX's -0.34% return. Both investments have delivered pretty close results over the past 10 years, with MIGNX having a 14.98% annualized return and MIGFX not far behind at 14.65%.

MIGNX

• 1D: -0.61%
• 1M: 3.16%
• YTD: -0.18%
• 6M: 0.32%
• 1Y: 10.06%
• 3Y*: 16.00%
• 5Y*: 10.42%
• 10Y*: 14.98%

MIGFX

• 1D: -0.62%
• 1M: 3.14%
• YTD: -0.34%
• 6M: 0.15%
• 1Y: 9.70%
• 3Y*: 15.64%
• 5Y*: 10.07%
• 10Y*: 14.65%

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

MIGNX vs. MIGFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MIGNX MFS Massachusetts Investors Growth Stock Fund Class R6	-0.18%	10.31%	27.60%	24.51%	-18.92%	26.52%	22.96%	40.34%	1.14%	29.12%
MIGFX MFS Massachusetts Investors Growth Stock Fund	-0.34%	9.97%	27.25%	24.13%	-19.20%	26.06%	22.55%	39.89%	0.81%	28.68%

Correlation

The correlation between MIGNX and MIGFX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	1.00
Correlation (All Time) Calculated using the full available price history since Jun 4, 2012	1.00

The correlation between MIGNX and MIGFX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

MIGNX vs. MIGFX — Risk / Return Rank

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

MIGNX

MIGNX Risk / Return Rank: 10
MIGNX Sharpe Ratio Rank: 11
MIGNX Sortino Ratio Rank: 11
MIGNX Omega Ratio Rank: 10
MIGNX Calmar Ratio Rank: 8
MIGNX Martin Ratio Rank: 9

MIGFX

MIGFX Risk / Return Rank: 9
MIGFX Sharpe Ratio Rank: 11
MIGFX Sortino Ratio Rank: 10
MIGFX Omega Ratio Rank: 10
MIGFX Calmar Ratio Rank: 8
MIGFX Martin Ratio Rank: 8

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.

MIGNX vs. MIGFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Massachusetts Investors Growth Stock Fund Class R6 (MIGNX) and MFS Massachusetts Investors Growth Stock Fund (MIGFX). 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.

	MIGNX	MIGFX	Difference
Sharpe ratio: Return per unit of total volatility	0.86	0.83	+0.03
Sortino ratio: Return per unit of downside risk	1.26	1.22	+0.04
Omega ratio: Gain probability vs. loss probability	1.15	1.15	+0.01
Calmar ratio: Return relative to maximum drawdown	0.80	0.76	+0.03
Martin ratio: Return relative to average drawdown	2.67	2.55	+0.12
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MIGNX vs. MIGFX - Sharpe Ratio Comparison

The current MIGNX Sharpe Ratio is 0.86, which is comparable to the MIGFX Sharpe Ratio of 0.83. The chart below compares the historical Sharpe Ratios of MIGNX and MIGFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	MIGNX	MIGFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.86	0.83	+0.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.58	+0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.83	0.81	+0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.88	0.39	+0.49

Drawdowns

MIGNX vs. MIGFX - Drawdown Comparison

The maximum MIGNX drawdown since its inception was -32.40%, smaller than the maximum MIGFX drawdown of -61.83%. Use the drawdown chart below to compare losses from any high point for MIGNX and MIGFX.

Drawdown Indicators

	MIGNX	MIGFX	Difference
Max Drawdown Largest peak-to-trough decline	-32.40%	-61.83%	+29.43%
Max Drawdown (1Y) Largest decline over 1 year	-13.68%	-13.77%	+0.09%
Max Drawdown (3Y) Largest decline over 3 years	-18.63%	-18.68%	+0.05%
Max Drawdown (5Y) Largest decline over 5 years	-26.48%	-26.67%	+0.19%
Max Drawdown (10Y) Largest decline over 10 years	-32.40%	-32.42%	+0.02%
Current Drawdown Current decline from peak	-2.26%	-2.40%	+0.14%
Average Drawdown Average peak-to-trough decline	-3.89%	-18.96%	+15.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.06%	4.11%	-0.05%

Volatility

MIGNX vs. MIGFX - Volatility Comparison

MFS Massachusetts Investors Growth Stock Fund Class R6 (MIGNX) and MFS Massachusetts Investors Growth Stock Fund (MIGFX) have volatilities of 3.40% and 3.42%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MIGNX	MIGFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.40%	3.42%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	9.79%	9.84%	-0.05%
Volatility (1Y) Calculated over the trailing 1-year period	12.64%	12.68%	-0.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.51%	17.52%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.21%	18.21%	0.00%

MIGNX vs. MIGFX - Expense Ratio Comparison

MIGNX has a 0.37% expense ratio, which is lower than MIGFX's 0.70% expense ratio.

Dividends

MIGNX vs. MIGFX - Dividend Comparison

MIGNX's dividend yield for the trailing twelve months is around 11.17%, less than MIGFX's 11.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MIGFX MFS Massachusetts Investors Growth Stock Fund	11.43%	11.39%	17.15%	4.11%	4.49%	10.47%	7.43%	7.39%	10.76%	6.87%	5.12%	6.51%
MIGNX MFS Massachusetts Investors Growth Stock Fund Class R6	11.17%	11.15%	16.98%	4.25%	4.67%	10.36%	7.48%	7.46%	10.83%	7.02%	4.99%	6.73%

Frequently Asked Questions

Can I hold both MIGNX and MIGFX in my portfolio?

With a correlation of 1.00, MIGNX and MIGFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, MIGNX or MIGFX?

MIGFX has higher volatility (3.42%) compared to MIGNX (3.40%). In terms of maximum drawdown, MIGNX dropped -32.40% vs MIGFX's -61.83%.

Which has better risk-adjusted returns?

MIGNX currently has the higher Sharpe Ratio (0.86 vs 0.83), 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.