THNMX vs. DFABX

Last updated Jun 24, 2026

THNMX (Thornburg New Mexico Intermediate Municipal Fund) and DFABX (DFA Short-Term Selective State Municipal Bond Portfolio) are both Municipal Bonds funds. Over the past 3 years, THNMX returned 3.33%/yr vs 2.78%/yr for DFABX. At a 0.38 correlation, their price movements are largely independent. THNMX charges 0.99%/yr vs 0.25%/yr for DFABX.

Performance

THNMX vs. DFABX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thornburg New Mexico Intermediate Municipal Fund (THNMX) and DFA Short-Term Selective State Municipal Bond Portfolio (DFABX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with THNMX having a 1.24% return and DFABX slightly lower at 1.18%.

THNMX

• 1D: 0.00%
• 1M: 1.22%
• YTD: 1.24%
• 6M: 1.48%
• 1Y: 4.96%
• 3Y*: 3.33%
• 5Y*: 0.85%
• 10Y*: 1.29%

DFABX

• 1D: 0.00%
• 1M: 0.30%
• YTD: 1.18%
• 6M: 1.18%
• 1Y: 2.66%
• 3Y*: 2.78%
• 5Y*: —
• 10Y*: —

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

THNMX vs. DFABX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
THNMX Thornburg New Mexico Intermediate Municipal Fund	1.24%	5.08%	1.10%	3.52%	-0.56%
DFABX DFA Short-Term Selective State Municipal Bond Portfolio	1.18%	2.46%	2.90%	2.87%	0.55%

Correlation

The correlation between THNMX and DFABX is 0.10, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.10
Correlation (3Y) Calculated over the trailing 3-year period	0.26
Correlation (All Time) Calculated using the full available price history since Apr 14, 2022	0.38

Over the past year, the correlation between THNMX and DFABX has dropped to 0.10 - well below their long-term average of 0.38, suggesting their price drivers have been diverging.

Return for Risk

THNMX vs. DFABX — Risk / Return Rank

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

THNMX

THNMX Risk / Return Rank: 74
THNMX Sharpe Ratio Rank: 88
THNMX Sortino Ratio Rank: 95
THNMX Omega Ratio Rank: 95
THNMX Calmar Ratio Rank: 49
THNMX Martin Ratio Rank: 42

DFABX

DFABX Risk / Return Rank: 100
DFABX Sharpe Ratio Rank: 99
DFABX Sortino Ratio Rank: 100
DFABX Omega Ratio Rank: 100
DFABX Calmar Ratio Rank: 100
DFABX 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.

THNMX vs. DFABX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thornburg New Mexico Intermediate Municipal Fund (THNMX) and DFA Short-Term Selective State Municipal Bond Portfolio (DFABX). 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.

	THNMX	DFABX	Difference
Sharpe ratio: Return per unit of total volatility	2.68	4.77	-2.08
Sortino ratio: Return per unit of downside risk	4.63	12.57	-7.94
Omega ratio: Gain probability vs. loss probability	1.75	6.47	-4.71
Calmar ratio: Return relative to maximum drawdown	2.54	24.96	-22.41
Martin ratio: Return relative to average drawdown	8.58	107.63	-99.06

THNMX vs. DFABX - Sharpe Ratio Comparison

The current THNMX Sharpe Ratio is 2.68, which is lower than the DFABX Sharpe Ratio of 4.77. The chart below compares the historical Sharpe Ratios of THNMX and DFABX, 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

THNMX vs. DFABX - Drawdown Comparison

The maximum THNMX drawdown since its inception was -9.86%, which is greater than DFABX's maximum drawdown of -2.46%. Use the drawdown chart below to compare losses from any high point for THNMX and DFABX.

Drawdown Indicators

	THNMX	DFABX	Difference
Max Drawdown Largest peak-to-trough decline	-9.86%	-2.46%	-7.40%
Max Drawdown (1Y) Largest decline over 1 year	-1.99%	-0.11%	-1.88%
Max Drawdown (3Y) Largest decline over 3 years	-3.52%	-0.60%	-2.92%
Max Drawdown (5Y) Largest decline over 5 years	-9.86%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-9.86%	—	—
Current Drawdown Current decline from peak	-0.22%	0.00%	-0.22%
Average Drawdown Average peak-to-trough decline	-1.22%	-0.23%	-0.99%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.59%	0.02%	+0.57%

Volatility

THNMX vs. DFABX - Volatility Comparison

Thornburg New Mexico Intermediate Municipal Fund (THNMX) has a higher volatility of 0.67% compared to DFA Short-Term Selective State Municipal Bond Portfolio (DFABX) at 0.17%. This indicates that THNMX's price experiences larger fluctuations and is considered to be riskier than DFABX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	THNMX	DFABX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.67%	0.17%	+0.50%
Volatility (6M) Calculated over the trailing 6-month period	1.41%	0.42%	+0.99%
Volatility (1Y) Calculated over the trailing 1-year period	1.89%	0.56%	+1.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.77%	0.96%	+1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.80%	0.96%	+1.84%

THNMX vs. DFABX - Expense Ratio Comparison

THNMX has a 0.99% expense ratio, which is higher than DFABX's 0.25% expense ratio.

Dividends

THNMX vs. DFABX - Dividend Comparison

THNMX's dividend yield for the trailing twelve months is around 2.95%, more than DFABX's 2.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFABX DFA Short-Term Selective State Municipal Bond Portfolio	2.62%	2.33%	2.86%	2.52%	1.25%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
THNMX Thornburg New Mexico Intermediate Municipal Fund	2.95%	3.86%	3.13%	1.75%	1.42%	1.45%	1.68%	2.44%	2.53%	2.41%	2.07%	2.35%

Frequently Asked Questions

Can I hold both THNMX and DFABX in my portfolio?

THNMX and DFABX have a correlation of 0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, THNMX or DFABX?

THNMX has higher volatility (0.67%) compared to DFABX (0.17%). In terms of maximum drawdown, THNMX dropped -9.86% vs DFABX's -2.46%.

Which has better risk-adjusted returns?

DFABX currently has the higher Sharpe Ratio (4.77 vs 2.68), 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.