MIGNX vs. ANFFX

Last updated Jun 4, 2026

MIGNX (MFS Massachusetts Investors Growth Stock Fund Class R6) and ANFFX (American Funds The New Economy Fund Class F-1) are both Large Cap Growth Equities funds. MIGNX is passively managed, while ANFFX is actively managed. Over the past 10 years, MIGNX returned 14.98%/yr vs 16.32%/yr for ANFFX. Their correlation of 0.88 suggests significant overlap in exposure. MIGNX charges 0.37%/yr vs 0.78%/yr for ANFFX.

Performance

MIGNX vs. ANFFX - 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 American Funds The New Economy Fund Class F-1 (ANFFX). 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 ANFFX's 22.86% return. Over the past 10 years, MIGNX has underperformed ANFFX with an annualized return of 14.98%, while ANFFX has yielded a comparatively higher 16.32% annualized 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%

ANFFX

• 1D: 0.02%
• 1M: 10.68%
• YTD: 22.86%
• 6M: 25.32%
• 1Y: 54.64%
• 3Y*: 30.64%
• 5Y*: 14.27%
• 10Y*: 16.32%

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

MIGNX vs. ANFFX - 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%
ANFFX American Funds The New Economy Fund Class F-1	22.86%	30.96%	23.52%	29.10%	-29.69%	11.98%	33.43%	26.38%	-4.41%	34.27%

Correlation

The correlation between MIGNX and ANFFX is 0.76, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.76
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Jun 4, 2012	0.88

The correlation between MIGNX and ANFFX shifts across timeframes, from 0.76 (1 year) to 0.88 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

MIGNX vs. ANFFX — 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

ANFFX

ANFFX Risk / Return Rank: 88
ANFFX Sharpe Ratio Rank: 94
ANFFX Sortino Ratio Rank: 86
ANFFX Omega Ratio Rank: 83
ANFFX Calmar Ratio Rank: 87
ANFFX Martin Ratio Rank: 91

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. ANFFX - 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 American Funds The New Economy Fund Class F-1 (ANFFX). 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	ANFFX	Difference
Sharpe ratio: Return per unit of total volatility	0.86	3.26	-2.39
Sortino ratio: Return per unit of downside risk	1.26	4.07	-2.81
Omega ratio: Gain probability vs. loss probability	1.15	1.55	-0.40
Calmar ratio: Return relative to maximum drawdown	0.80	4.19	-3.39
Martin ratio: Return relative to average drawdown	2.67	18.73	-16.06
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. ANFFX - Sharpe Ratio Comparison

The current MIGNX Sharpe Ratio is 0.86, which is lower than the ANFFX Sharpe Ratio of 3.26. The chart below compares the historical Sharpe Ratios of MIGNX and ANFFX, 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	ANFFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.86	3.26	-2.39
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.74	-0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.83	0.86	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.88	0.53	+0.35

Drawdowns

MIGNX vs. ANFFX - Drawdown Comparison

The maximum MIGNX drawdown since its inception was -32.40%, smaller than the maximum ANFFX drawdown of -55.37%. Use the drawdown chart below to compare losses from any high point for MIGNX and ANFFX.

Drawdown Indicators

	MIGNX	ANFFX	Difference
Max Drawdown Largest peak-to-trough decline	-32.40%	-55.37%	+22.97%
Max Drawdown (1Y) Largest decline over 1 year	-13.68%	-13.36%	-0.32%
Max Drawdown (3Y) Largest decline over 3 years	-18.63%	-20.81%	+2.18%
Max Drawdown (5Y) Largest decline over 5 years	-26.48%	-37.10%	+10.62%
Max Drawdown (10Y) Largest decline over 10 years	-32.40%	-37.10%	+4.70%
Current Drawdown Current decline from peak	-2.26%	0.00%	-2.26%
Average Drawdown Average peak-to-trough decline	-3.89%	-11.37%	+7.48%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.06%	2.98%	+1.08%

Volatility

MIGNX vs. ANFFX - Volatility Comparison

The current volatility for MFS Massachusetts Investors Growth Stock Fund Class R6 (MIGNX) is 3.40%, while American Funds The New Economy Fund Class F-1 (ANFFX) has a volatility of 5.30%. This indicates that MIGNX experiences smaller price fluctuations and is considered to be less risky than ANFFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MIGNX	ANFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.40%	5.30%	-1.90%
Volatility (6M) Calculated over the trailing 6-month period	9.79%	13.71%	-3.92%
Volatility (1Y) Calculated over the trailing 1-year period	12.64%	17.19%	-4.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.51%	19.39%	-1.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.21%	19.11%	-0.90%

MIGNX vs. ANFFX - Expense Ratio Comparison

MIGNX has a 0.37% expense ratio, which is lower than ANFFX's 0.78% expense ratio.

Dividends

MIGNX vs. ANFFX - Dividend Comparison

MIGNX's dividend yield for the trailing twelve months is around 11.17%, more than ANFFX's 8.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ANFFX American Funds The New Economy Fund Class F-1	8.06%	9.90%	9.56%	3.89%	0.00%	7.53%	2.45%	7.26%	9.84%	8.19%	2.13%	6.07%
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 ANFFX in my portfolio?

MIGNX and ANFFX have a correlation of 0.76, 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 ANFFX?

ANFFX has higher volatility (5.30%) compared to MIGNX (3.40%). In terms of maximum drawdown, MIGNX dropped -32.40% vs ANFFX's -55.37%.

Which has better risk-adjusted returns?

ANFFX currently has the higher Sharpe Ratio (3.26 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.