MIGNX vs. SWLGX

Last updated Jun 4, 2026

MIGNX (MFS Massachusetts Investors Growth Stock Fund Class R6) and SWLGX (Schwab U.S. Large-Cap Growth Index Fund) are both Large Cap Growth Equities funds tracking the Russell 1000 Growth Index, from MFS and Charles Schwab respectively. Both are passively managed. Over the past 5 years, MIGNX returned 10.42%/yr vs 16.03%/yr for SWLGX. Their correlation of 0.92 suggests significant overlap in exposure. MIGNX charges 0.37%/yr vs 0.04%/yr for SWLGX.

Performance

MIGNX vs. SWLGX - 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 Schwab U.S. Large-Cap Growth Index Fund (SWLGX). 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 lower than SWLGX's 8.61% return.

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%

SWLGX

• 1D: -0.37%
• 1M: 7.15%
• YTD: 8.61%
• 6M: 8.00%
• 1Y: 27.46%
• 3Y*: 25.54%
• 5Y*: 16.03%
• 10Y*: —

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

MIGNX vs. SWLGX - 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%	-0.31%
SWLGX Schwab U.S. Large-Cap Growth Index Fund	8.61%	18.55%	33.30%	42.67%	-29.17%	27.55%	38.43%	36.30%	-1.59%	-0.60%

Correlation

The correlation between MIGNX and SWLGX 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 (1Y) Calculated over the trailing 1-year period	0.86
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (All Time) Calculated using the full available price history since Dec 20, 2017	0.92

The correlation between MIGNX and SWLGX has been stable across timeframes, ranging from 0.86 to 0.92 - a consistent structural relationship.

Return for Risk

MIGNX vs. SWLGX — 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

SWLGX

SWLGX Risk / Return Rank: 32
SWLGX Sharpe Ratio Rank: 40
SWLGX Sortino Ratio Rank: 36
SWLGX Omega Ratio Rank: 37
SWLGX Calmar Ratio Rank: 22
SWLGX Martin Ratio Rank: 23

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. SWLGX - 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 Schwab U.S. Large-Cap Growth Index Fund (SWLGX). 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	SWLGX	Difference
Sharpe ratio: Return per unit of total volatility	0.86	1.85	-0.99
Sortino ratio: Return per unit of downside risk	1.26	2.50	-1.24
Omega ratio: Gain probability vs. loss probability	1.15	1.32	-0.17
Calmar ratio: Return relative to maximum drawdown	0.80	1.76	-0.96
Martin ratio: Return relative to average drawdown	2.67	5.92	-3.25
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. SWLGX - Sharpe Ratio Comparison

The current MIGNX Sharpe Ratio is 0.86, which is lower than the SWLGX Sharpe Ratio of 1.85. The chart below compares the historical Sharpe Ratios of MIGNX and SWLGX, 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	SWLGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.86	1.85	-0.99
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.75	-0.15
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.83	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.88	0.80	+0.08

Drawdowns

MIGNX vs. SWLGX - Drawdown Comparison

The maximum MIGNX drawdown since its inception was -32.40%, roughly equal to the maximum SWLGX drawdown of -32.69%. Use the drawdown chart below to compare losses from any high point for MIGNX and SWLGX.

Drawdown Indicators

	MIGNX	SWLGX	Difference
Max Drawdown Largest peak-to-trough decline	-32.40%	-32.69%	+0.29%
Max Drawdown (1Y) Largest decline over 1 year	-13.68%	-16.16%	+2.48%
Max Drawdown (3Y) Largest decline over 3 years	-18.63%	-23.30%	+4.67%
Max Drawdown (5Y) Largest decline over 5 years	-26.48%	-32.69%	+6.21%
Max Drawdown (10Y) Largest decline over 10 years	-32.40%	—	—
Current Drawdown Current decline from peak	-2.26%	-0.37%	-1.89%
Average Drawdown Average peak-to-trough decline	-3.89%	-7.05%	+3.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.06%	4.80%	-0.74%

Volatility

MIGNX vs. SWLGX - Volatility Comparison

MFS Massachusetts Investors Growth Stock Fund Class R6 (MIGNX) and Schwab U.S. Large-Cap Growth Index Fund (SWLGX) have volatilities of 3.40% and 3.30%, 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	SWLGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.40%	3.30%	+0.10%
Volatility (6M) Calculated over the trailing 6-month period	9.79%	11.59%	-1.80%
Volatility (1Y) Calculated over the trailing 1-year period	12.64%	15.40%	-2.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.51%	21.49%	-3.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.21%	22.68%	-4.47%

MIGNX vs. SWLGX - Expense Ratio Comparison

MIGNX has a 0.37% expense ratio, which is higher than SWLGX's 0.04% expense ratio.

Dividends

MIGNX vs. SWLGX - Dividend Comparison

MIGNX's dividend yield for the trailing twelve months is around 11.17%, more than SWLGX's 0.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
SWLGX Schwab U.S. Large-Cap Growth Index Fund	0.42%	0.46%	0.52%	0.67%	0.93%	1.76%	0.67%	0.96%	1.03%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MIGNX and SWLGX in my portfolio?

MIGNX and SWLGX 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.

Which is riskier, MIGNX or SWLGX?

MIGNX has higher volatility (3.40%) compared to SWLGX (3.30%). In terms of maximum drawdown, MIGNX dropped -32.40% vs SWLGX's -32.69%.

Which has better risk-adjusted returns?

SWLGX currently has the higher Sharpe Ratio (1.85 vs 0.86), 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.