EIBSX vs. ATOIX

Last updated Jun 23, 2026

EIBSX (Parametric TABS Short-Term Municipal Bond Fund) and ATOIX (abrdn Ultra Short Municipal Income Fund) are both Municipal Bonds funds. Over the past 10 years, EIBSX returned 2.05%/yr vs 1.79%/yr for ATOIX. At a 0.20 correlation, their price movements are largely independent. EIBSX charges 0.55%/yr vs 0.44%/yr for ATOIX.

Performance

EIBSX vs. ATOIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Parametric TABS Short-Term Municipal Bond Fund (EIBSX) and abrdn Ultra Short Municipal Income Fund (ATOIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, EIBSX achieves a 1.32% return, which is significantly higher than ATOIX's 1.01% return. Over the past 10 years, EIBSX has outperformed ATOIX with an annualized return of 2.05%, while ATOIX has yielded a comparatively lower 1.79% annualized return.

EIBSX

• 1D: 0.00%
• 1M: 1.05%
• YTD: 1.32%
• 6M: 1.70%
• 1Y: 5.87%
• 3Y*: 4.32%
• 5Y*: 1.87%
• 10Y*: 2.05%

ATOIX

• 1D: 0.00%
• 1M: 0.20%
• YTD: 1.01%
• 6M: 1.54%
• 1Y: 3.02%
• 3Y*: 3.08%
• 5Y*: 2.30%
• 10Y*: 1.79%

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

EIBSX vs. ATOIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
EIBSX Parametric TABS Short-Term Municipal Bond Fund	1.32%	6.85%	2.14%	4.24%	-4.76%	-0.09%	5.95%	4.56%	0.69%	2.32%
ATOIX abrdn Ultra Short Municipal Income Fund	1.01%	3.33%	3.14%	3.27%	0.87%	-0.04%	0.88%	1.40%	1.54%	2.24%

Correlation

The correlation between EIBSX and ATOIX is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.25
Correlation (3Y) Calculated over the trailing 3-year period	0.29
Correlation (5Y) Calculated over the trailing 5-year period	0.27
Correlation (10Y) Calculated over the trailing 10-year period	0.27
Correlation (All Time) Calculated using the full available price history since Mar 30, 2009	0.21

Return for Risk

EIBSX vs. ATOIX — Risk / Return Rank

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

EIBSX

EIBSX Risk / Return Rank: 79
EIBSX Sharpe Ratio Rank: 95
EIBSX Sortino Ratio Rank: 97
EIBSX Omega Ratio Rank: 96
EIBSX Calmar Ratio Rank: 58
EIBSX Martin Ratio Rank: 49

ATOIX

ATOIX Risk / Return Rank: 99
ATOIX Sharpe Ratio Rank: 98
ATOIX Sortino Ratio Rank: 100
ATOIX Omega Ratio Rank: 100
ATOIX Calmar Ratio Rank: 100
ATOIX 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.

EIBSX vs. ATOIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Parametric TABS Short-Term Municipal Bond Fund (EIBSX) and abrdn Ultra Short Municipal Income Fund (ATOIX). 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.

	EIBSX	ATOIX	Difference
Sharpe ratio: Return per unit of total volatility	3.06	3.50	-0.43
Sortino ratio: Return per unit of downside risk	5.17	17.32	-12.15
Omega ratio: Gain probability vs. loss probability	1.85	10.98	-9.13
Calmar ratio: Return relative to maximum drawdown	2.78	30.48	-27.70
Martin ratio: Return relative to average drawdown	9.49	89.66	-80.17

EIBSX vs. ATOIX - Sharpe Ratio Comparison

The current EIBSX Sharpe Ratio is 3.06, which is comparable to the ATOIX Sharpe Ratio of 3.50. The chart below compares the historical Sharpe Ratios of EIBSX and ATOIX, 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

EIBSX vs. ATOIX - Drawdown Comparison

The maximum EIBSX drawdown since its inception was -9.75%, which is greater than ATOIX's maximum drawdown of -1.46%. Use the drawdown chart below to compare losses from any high point for EIBSX and ATOIX.

Drawdown Indicators

	EIBSX	ATOIX	Difference
Max Drawdown Largest peak-to-trough decline	-9.75%	-1.46%	-8.29%
Max Drawdown (1Y) Largest decline over 1 year	-2.12%	-0.10%	-2.02%
Max Drawdown (3Y) Largest decline over 3 years	-4.19%	-0.10%	-4.09%
Max Drawdown (5Y) Largest decline over 5 years	-8.99%	-0.37%	-8.62%
Max Drawdown (10Y) Largest decline over 10 years	-9.75%	-0.43%	-9.32%
Current Drawdown Current decline from peak	-0.46%	0.00%	-0.46%
Average Drawdown Average peak-to-trough decline	-1.43%	-0.06%	-1.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.62%	0.03%	+0.59%

Volatility

EIBSX vs. ATOIX - Volatility Comparison

Parametric TABS Short-Term Municipal Bond Fund (EIBSX) has a higher volatility of 0.54% compared to abrdn Ultra Short Municipal Income Fund (ATOIX) at 0.20%. This indicates that EIBSX's price experiences larger fluctuations and is considered to be riskier than ATOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	EIBSX	ATOIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.54%	0.20%	+0.34%
Volatility (6M) Calculated over the trailing 6-month period	1.51%	0.61%	+0.90%
Volatility (1Y) Calculated over the trailing 1-year period	1.93%	0.87%	+1.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.97%	0.83%	+2.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.01%	0.79%	+2.22%

EIBSX vs. ATOIX - Expense Ratio Comparison

EIBSX has a 0.55% expense ratio, which is higher than ATOIX's 0.44% expense ratio.

Dividends

EIBSX vs. ATOIX - Dividend Comparison

EIBSX's dividend yield for the trailing twelve months is around 3.22%, more than ATOIX's 2.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ATOIX abrdn Ultra Short Municipal Income Fund	2.98%	3.27%	3.09%	3.02%	1.07%	0.06%	0.88%	1.39%	1.42%	2.20%	0.61%	0.52%
EIBSX Parametric TABS Short-Term Municipal Bond Fund	3.22%	4.18%	3.81%	2.14%	1.62%	1.41%	3.17%	2.05%	1.75%	1.63%	2.15%	2.08%

Frequently Asked Questions

Can I hold both EIBSX and ATOIX in my portfolio?

EIBSX and ATOIX have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, EIBSX or ATOIX?

EIBSX has higher volatility (0.54%) compared to ATOIX (0.20%). In terms of maximum drawdown, EIBSX dropped -9.75% vs ATOIX's -1.46%.

Which has better risk-adjusted returns?

ATOIX currently has the higher Sharpe Ratio (3.50 vs 3.06), 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.