SLMMX vs. DFSMX

Last updated Jun 23, 2026

SLMMX (Western Asset Massachusetts Municipals Fund) and DFSMX (DFA Short Term Municipal Bond Portfolio) are both Municipal Bonds funds. Over the past 10 years, SLMMX returned 1.20%/yr vs 1.26%/yr for DFSMX. At a 0.30 correlation, their price movements are largely independent. SLMMX charges 0.75%/yr vs 0.20%/yr for DFSMX.

Performance

SLMMX vs. DFSMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Western Asset Massachusetts Municipals Fund (SLMMX) and DFA Short Term Municipal Bond Portfolio (DFSMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SLMMX achieves a 2.17% return, which is significantly higher than DFSMX's 1.15% return. Both investments have delivered pretty close results over the past 10 years, with SLMMX having a 1.20% annualized return and DFSMX not far ahead at 1.26%.

SLMMX

• 1D: 0.09%
• 1M: 2.06%
• YTD: 2.17%
• 6M: 2.67%
• 1Y: 8.00%
• 3Y*: 3.36%
• 5Y*: 0.11%
• 10Y*: 1.20%

DFSMX

• 1D: 0.10%
• 1M: 0.40%
• YTD: 1.15%
• 6M: 1.15%
• 1Y: 2.48%
• 3Y*: 2.71%
• 5Y*: 1.74%
• 10Y*: 1.26%

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

SLMMX vs. DFSMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SLMMX Western Asset Massachusetts Municipals Fund	2.17%	3.76%	1.22%	5.51%	-11.55%	1.73%	3.31%	6.85%	0.02%	5.10%
DFSMX DFA Short Term Municipal Bond Portfolio	1.15%	2.30%	2.84%	2.98%	-0.36%	-0.11%	0.83%	1.62%	1.22%	1.15%

Correlation

The correlation between SLMMX and DFSMX is 0.17, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.17
Correlation (3Y) Calculated over the trailing 3-year period	0.27
Correlation (5Y) Calculated over the trailing 5-year period	0.37
Correlation (10Y) Calculated over the trailing 10-year period	0.31
Correlation (All Time) Calculated using the full available price history since Aug 22, 2002	0.30

The correlation between SLMMX and DFSMX shifts across timeframes, from 0.17 (1 year) to 0.37 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

SLMMX vs. DFSMX — Risk / Return Rank

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

SLMMX

SLMMX Risk / Return Rank: 77
SLMMX Sharpe Ratio Rank: 88
SLMMX Sortino Ratio Rank: 90
SLMMX Omega Ratio Rank: 91
SLMMX Calmar Ratio Rank: 60
SLMMX Martin Ratio Rank: 54

DFSMX

DFSMX Risk / Return Rank: 99
DFSMX Sharpe Ratio Rank: 99
DFSMX Sortino Ratio Rank: 99
DFSMX Omega Ratio Rank: 99
DFSMX Calmar Ratio Rank: 99
DFSMX Martin Ratio Rank: 100

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.

SLMMX vs. DFSMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Western Asset Massachusetts Municipals Fund (SLMMX) and DFA Short Term Municipal Bond Portfolio (DFSMX). 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.

	SLMMX	DFSMX	Difference
Sharpe ratio: Return per unit of total volatility	2.67	4.16	-1.49
Sortino ratio: Return per unit of downside risk	4.11	8.56	-4.45
Omega ratio: Gain probability vs. loss probability	1.63	4.46	-2.82
Calmar ratio: Return relative to maximum drawdown	2.84	12.85	-10.01
Martin ratio: Return relative to average drawdown	10.26	76.73	-66.47

SLMMX vs. DFSMX - Sharpe Ratio Comparison

The current SLMMX Sharpe Ratio is 2.67, which is lower than the DFSMX Sharpe Ratio of 4.16. The chart below compares the historical Sharpe Ratios of SLMMX and DFSMX, 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

SLMMX vs. DFSMX - Drawdown Comparison

The maximum SLMMX drawdown since its inception was -16.75%, which is greater than DFSMX's maximum drawdown of -2.66%. Use the drawdown chart below to compare losses from any high point for SLMMX and DFSMX.

Drawdown Indicators

	SLMMX	DFSMX	Difference
Max Drawdown Largest peak-to-trough decline	-16.75%	-2.66%	-14.09%
Max Drawdown (1Y) Largest decline over 1 year	-2.83%	-0.20%	-2.63%
Max Drawdown (3Y) Largest decline over 3 years	-6.79%	-0.49%	-6.30%
Max Drawdown (5Y) Largest decline over 5 years	-16.75%	-1.66%	-15.09%
Max Drawdown (10Y) Largest decline over 10 years	-16.75%	-1.69%	-15.06%
Current Drawdown Current decline from peak	-0.20%	0.00%	-0.20%
Average Drawdown Average peak-to-trough decline	-2.27%	-0.23%	-2.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.78%	0.03%	+0.75%

Volatility

SLMMX vs. DFSMX - Volatility Comparison

Western Asset Massachusetts Municipals Fund (SLMMX) has a higher volatility of 0.90% compared to DFA Short Term Municipal Bond Portfolio (DFSMX) at 0.18%. This indicates that SLMMX's price experiences larger fluctuations and is considered to be riskier than DFSMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SLMMX	DFSMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.90%	0.18%	+0.72%
Volatility (6M) Calculated over the trailing 6-month period	2.25%	0.38%	+1.87%
Volatility (1Y) Calculated over the trailing 1-year period	3.02%	0.61%	+2.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.53%	0.79%	+3.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.32%	0.77%	+3.55%

SLMMX vs. DFSMX - Expense Ratio Comparison

SLMMX has a 0.75% expense ratio, which is higher than DFSMX's 0.20% expense ratio.

Dividends

SLMMX vs. DFSMX - Dividend Comparison

SLMMX's dividend yield for the trailing twelve months is around 2.34%, which matches DFSMX's 2.35% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFSMX DFA Short Term Municipal Bond Portfolio	2.35%	2.08%	2.80%	1.94%	0.63%	0.19%	0.83%	1.22%	1.11%	0.95%	0.94%	0.95%
SLMMX Western Asset Massachusetts Municipals Fund	2.34%	3.27%	2.62%	2.34%	1.81%	1.40%	2.29%	3.02%	3.13%	3.12%	3.10%	3.32%

Frequently Asked Questions

Can I hold both SLMMX and DFSMX in my portfolio?

SLMMX and DFSMX have a correlation of 0.17, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SLMMX or DFSMX?

SLMMX has higher volatility (0.90%) compared to DFSMX (0.18%). In terms of maximum drawdown, SLMMX dropped -16.75% vs DFSMX's -2.66%.

Which has better risk-adjusted returns?

DFSMX currently has the higher Sharpe Ratio (4.16 vs 2.67), 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.