MFEGX vs. TAFTX

Last updated Jun 4, 2026

MFEGX (MFS Growth Fund Class A) and TAFTX (American Funds Tax-Exempt Fund of California) are both mutual funds - MFEGX is a Large Cap Growth Equities fund tracking the Russell 1000® Growth Index, while TAFTX is a Municipal Bonds fund managed by American Funds. Over the past 10 years, MFEGX returned 17.98%/yr vs 2.09%/yr for TAFTX. At a correlation of -0.02, they often move in opposite directions. MFEGX charges 0.83%/yr vs 0.57%/yr for TAFTX.

Performance

MFEGX vs. TAFTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Growth Fund Class A (MFEGX) and American Funds Tax-Exempt Fund of California (TAFTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFEGX achieves a 6.18% return, which is significantly higher than TAFTX's 1.58% return. Over the past 10 years, MFEGX has outperformed TAFTX with an annualized return of 17.98%, while TAFTX has yielded a comparatively lower 2.09% annualized return.

MFEGX

• 1D: -0.34%
• 1M: 4.73%
• YTD: 6.18%
• 6M: 5.82%
• 1Y: 17.35%
• 3Y*: 26.91%
• 5Y*: 14.42%
• 10Y*: 17.98%

TAFTX

• 1D: 0.18%
• 1M: 0.86%
• YTD: 1.58%
• 6M: 1.91%
• 1Y: 7.46%
• 3Y*: 4.15%
• 5Y*: 0.88%
• 10Y*: 2.09%

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

MFEGX vs. TAFTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MFEGX MFS Growth Fund Class A	6.18%	12.06%	51.46%	35.81%	-31.31%	23.28%	36.29%	37.35%	2.04%	30.52%
TAFTX American Funds Tax-Exempt Fund of California	1.58%	4.73%	2.31%	5.76%	-9.78%	1.88%	4.43%	7.33%	0.71%	5.96%

Correlation

The correlation between MFEGX and TAFTX is 0.13, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.13
Correlation (3Y) Calculated over the trailing 3-year period	0.09
Correlation (5Y) Calculated over the trailing 5-year period	0.10
Correlation (10Y) Calculated over the trailing 10-year period	0.04
Correlation (All Time) Calculated using the full available price history since Sep 14, 1993	-0.02

The correlation between MFEGX and TAFTX shifts across timeframes, from -0.02 (all time) to 0.13 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MFEGX vs. TAFTX — Risk / Return Rank

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

MFEGX

MFEGX Risk / Return Rank: 14
MFEGX Sharpe Ratio Rank: 16
MFEGX Sortino Ratio Rank: 15
MFEGX Omega Ratio Rank: 15
MFEGX Calmar Ratio Rank: 11
MFEGX Martin Ratio Rank: 11

TAFTX

TAFTX Risk / Return Rank: 67
TAFTX Sharpe Ratio Rank: 80
TAFTX Sortino Ratio Rank: 85
TAFTX Omega Ratio Rank: 89
TAFTX Calmar Ratio Rank: 41
TAFTX Martin Ratio Rank: 39

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.

MFEGX vs. TAFTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Growth Fund Class A (MFEGX) and American Funds Tax-Exempt Fund of California (TAFTX). 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.

	MFEGX	TAFTX	Difference
Sharpe ratio: Return per unit of total volatility	1.13	2.60	-1.47
Sortino ratio: Return per unit of downside risk	1.61	4.06	-2.45
Omega ratio: Gain probability vs. loss probability	1.20	1.63	-0.42
Calmar ratio: Return relative to maximum drawdown	1.03	2.42	-1.38
Martin ratio: Return relative to average drawdown	3.34	8.51	-5.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MFEGX vs. TAFTX - Sharpe Ratio Comparison

The current MFEGX Sharpe Ratio is 1.13, which is lower than the TAFTX Sharpe Ratio of 2.60. The chart below compares the historical Sharpe Ratios of MFEGX and TAFTX, 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

	MFEGX	TAFTX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.13	2.60	-1.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.66	0.22	+0.44
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.85	0.53	+0.31
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	1.28	-0.78

Drawdowns

MFEGX vs. TAFTX - Drawdown Comparison

The maximum MFEGX drawdown since its inception was -72.42%, which is greater than TAFTX's maximum drawdown of -18.83%. Use the drawdown chart below to compare losses from any high point for MFEGX and TAFTX.

Drawdown Indicators

	MFEGX	TAFTX	Difference
Max Drawdown Largest peak-to-trough decline	-72.42%	-18.83%	-53.59%
Max Drawdown (1Y) Largest decline over 1 year	-17.39%	-3.05%	-14.34%
Max Drawdown (3Y) Largest decline over 3 years	-23.28%	-5.66%	-17.62%
Max Drawdown (5Y) Largest decline over 5 years	-36.27%	-14.82%	-21.45%
Max Drawdown (10Y) Largest decline over 10 years	-36.27%	-14.82%	-21.45%
Current Drawdown Current decline from peak	-0.34%	-0.46%	+0.12%
Average Drawdown Average peak-to-trough decline	-22.23%	-1.94%	-20.29%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.36%	0.86%	+4.50%

Volatility

MFEGX vs. TAFTX - Volatility Comparison

MFS Growth Fund Class A (MFEGX) has a higher volatility of 3.60% compared to American Funds Tax-Exempt Fund of California (TAFTX) at 1.15%. This indicates that MFEGX's price experiences larger fluctuations and is considered to be riskier than TAFTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFEGX	TAFTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.60%	1.15%	+2.45%
Volatility (6M) Calculated over the trailing 6-month period	12.24%	2.15%	+10.09%
Volatility (1Y) Calculated over the trailing 1-year period	15.83%	2.84%	+12.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.11%	4.05%	+18.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.35%	3.92%	+17.43%

MFEGX vs. TAFTX - Expense Ratio Comparison

MFEGX has a 0.83% expense ratio, which is higher than TAFTX's 0.57% expense ratio.

Dividends

MFEGX vs. TAFTX - Dividend Comparison

MFEGX's dividend yield for the trailing twelve months is around 15.90%, more than TAFTX's 3.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFEGX MFS Growth Fund Class A	15.90%	16.88%	28.04%	5.30%	1.14%	2.98%	7.45%	1.68%	3.96%	2.65%	1.68%	3.84%
TAFTX American Funds Tax-Exempt Fund of California	3.04%	3.96%	2.64%	2.19%	1.82%	2.19%	2.65%	3.15%	2.93%	2.95%	3.13%	3.32%

Frequently Asked Questions

Can I hold both MFEGX and TAFTX in my portfolio?

MFEGX and TAFTX have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFEGX or TAFTX?

MFEGX has higher volatility (3.60%) compared to TAFTX (1.15%). In terms of maximum drawdown, MFEGX dropped -72.42% vs TAFTX's -18.83%.

Which has better risk-adjusted returns?

TAFTX currently has the higher Sharpe Ratio (2.60 vs 1.13), 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.