DUALX vs. SPTS

Last updated Jun 4, 2026

DUALX (Dupree Alabama Tax Free Income Series Fund) and SPTS (SPDR Portfolio Short Term Treasury ETF) are both funds - DUALX is a Municipal Bonds fund managed by Dupree, while SPTS is a Government Bonds fund tracking the Bloomberg U.S. Treasury 1-3 Year Index. Over the past 10 years, DUALX returned 2.85%/yr vs 1.67%/yr for SPTS. At a 0.32 correlation, their price movements are largely independent. DUALX charges 0.70%/yr vs 0.03%/yr for SPTS.

Performance

DUALX vs. SPTS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Dupree Alabama Tax Free Income Series Fund (DUALX) and SPDR Portfolio Short Term Treasury ETF (SPTS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DUALX achieves a 1.58% return, which is significantly higher than SPTS's 0.45% return. Over the past 10 years, DUALX has outperformed SPTS with an annualized return of 2.85%, while SPTS has yielded a comparatively lower 1.67% annualized return.

DUALX

• 1D: 0.17%
• 1M: 0.35%
• YTD: 1.58%
• 6M: 2.47%
• 1Y: 8.17%
• 3Y*: 4.03%
• 5Y*: 1.31%
• 10Y*: 2.85%

SPTS

• 1D: -0.07%
• 1M: 0.05%
• YTD: 0.45%
• 6M: 0.77%
• 1Y: 3.45%
• 3Y*: 4.18%
• 5Y*: 1.81%
• 10Y*: 1.67%

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

DUALX vs. SPTS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
DUALX Dupree Alabama Tax Free Income Series Fund	1.58%	4.52%	1.88%	5.58%	-7.77%	2.26%	6.13%	8.36%	2.44%	5.69%
SPTS SPDR Portfolio Short Term Treasury ETF	0.45%	5.05%	4.20%	4.27%	-3.86%	-0.72%	3.23%	3.56%	1.08%	0.59%

Correlation

The correlation between DUALX and SPTS is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.30
Correlation (3Y) Calculated over the trailing 3-year period	0.32
Correlation (5Y) Calculated over the trailing 5-year period	0.33
Correlation (10Y) Calculated over the trailing 10-year period	0.34
Correlation (All Time) Calculated using the full available price history since Dec 2, 2011	0.32

Return for Risk

DUALX vs. SPTS — Risk / Return Rank

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

DUALX

DUALX Risk / Return Rank: 69
DUALX Sharpe Ratio Rank: 68
DUALX Sortino Ratio Rank: 86
DUALX Omega Ratio Rank: 95
DUALX Calmar Ratio Rank: 48
DUALX Martin Ratio Rank: 51

SPTS

SPTS Risk / Return Rank: 84
SPTS Sharpe Ratio Rank: 79
SPTS Sortino Ratio Rank: 91
SPTS Omega Ratio Rank: 87
SPTS Calmar Ratio Rank: 79
SPTS Martin Ratio Rank: 82

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.

DUALX vs. SPTS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Dupree Alabama Tax Free Income Series Fund (DUALX) and SPDR Portfolio Short Term Treasury ETF (SPTS). 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.

	DUALX	SPTS	Difference
Sharpe ratio: Return per unit of total volatility	2.40	2.63	-0.23
Sortino ratio: Return per unit of downside risk	4.09	4.47	-0.37
Omega ratio: Gain probability vs. loss probability	1.77	1.55	+0.22
Calmar ratio: Return relative to maximum drawdown	2.65	4.13	-1.48
Martin ratio: Return relative to average drawdown	10.41	16.52	-6.12
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

DUALX vs. SPTS - Sharpe Ratio Comparison

The current DUALX Sharpe Ratio is 2.40, which is comparable to the SPTS Sharpe Ratio of 2.63. The chart below compares the historical Sharpe Ratios of DUALX and SPTS, 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

	DUALX	SPTS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.40	2.63	-0.23
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	0.92	-0.65
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.67	0.98	-0.31
Sharpe Ratio (All Time) Calculated using the full available price history	1.12	0.49	+0.63

Drawdowns

DUALX vs. SPTS - Drawdown Comparison

The maximum DUALX drawdown since its inception was -12.15%, which is greater than SPTS's maximum drawdown of -5.83%. Use the drawdown chart below to compare losses from any high point for DUALX and SPTS.

Drawdown Indicators

	DUALX	SPTS	Difference
Max Drawdown Largest peak-to-trough decline	-12.15%	-5.83%	-6.32%
Max Drawdown (1Y) Largest decline over 1 year	-3.10%	-0.84%	-2.26%
Max Drawdown (3Y) Largest decline over 3 years	-7.27%	-0.96%	-6.31%
Max Drawdown (5Y) Largest decline over 5 years	-12.11%	-5.71%	-6.40%
Max Drawdown (10Y) Largest decline over 10 years	-12.11%	-5.71%	-6.40%
Current Drawdown Current decline from peak	-0.25%	-0.28%	+0.03%
Average Drawdown Average peak-to-trough decline	-1.58%	-1.72%	+0.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.79%	0.21%	+0.58%

Volatility

DUALX vs. SPTS - Volatility Comparison

Dupree Alabama Tax Free Income Series Fund (DUALX) has a higher volatility of 1.13% compared to SPDR Portfolio Short Term Treasury ETF (SPTS) at 0.34%. This indicates that DUALX's price experiences larger fluctuations and is considered to be riskier than SPTS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DUALX	SPTS	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.13%	0.34%	+0.79%
Volatility (6M) Calculated over the trailing 6-month period	2.58%	0.86%	+1.72%
Volatility (1Y) Calculated over the trailing 1-year period	3.42%	1.32%	+2.10%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.89%	1.98%	+2.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.29%	1.72%	+2.57%

DUALX vs. SPTS - Expense Ratio Comparison

DUALX has a 0.70% expense ratio, which is higher than SPTS's 0.03% expense ratio.

Dividends

DUALX vs. SPTS - Dividend Comparison

DUALX's dividend yield for the trailing twelve months is around 3.05%, less than SPTS's 3.91% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DUALX Dupree Alabama Tax Free Income Series Fund	3.05%	3.79%	4.33%	3.08%	3.49%	3.09%	3.24%	3.75%	4.87%	4.44%	3.13%	3.20%
SPTS SPDR Portfolio Short Term Treasury ETF	3.91%	3.99%	4.25%	3.61%	1.27%	0.19%	0.70%	2.21%	2.04%	1.20%	0.95%	0.83%

Frequently Asked Questions

Can I hold both DUALX and SPTS in my portfolio?

DUALX and SPTS have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DUALX or SPTS?

DUALX has higher volatility (1.13%) compared to SPTS (0.34%). In terms of maximum drawdown, DUALX dropped -12.15% vs SPTS's -5.83%.

Which has better risk-adjusted returns?

SPTS currently has the higher Sharpe Ratio (2.63 vs 2.40), 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.