AUSM vs. IBMM

Last updated Jun 4, 2026

AUSM (Allspring Ultra Short Municipal ETF) and IBMM (iShares iBonds Dec 2024 Term Muni Bond ETF) are both Municipal Bonds funds. AUSM is actively managed, while IBMM is passively managed. Both charge a 0.18% expense ratio.

Performance

AUSM vs. IBMM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Allspring Ultra Short Municipal ETF (AUSM) and iShares iBonds Dec 2024 Term Muni Bond ETF (IBMM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

AUSM

• 1D: -0.02%
• 1M: 0.21%
• YTD: 0.98%
• 6M: 1.34%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

IBMM

• 1D: 0.00%
• 1M: 0.00%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

AUSM vs. IBMM - Yearly Performance Comparison

	2026 (YTD)
AUSM Allspring Ultra Short Municipal ETF	0.50%
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%

Return for Risk

AUSM vs. IBMM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Allspring Ultra Short Municipal ETF (AUSM) and iShares iBonds Dec 2024 Term Muni Bond ETF (IBMM). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	AUSM	IBMM	Difference
Sharpe Ratio (All Time) Calculated using the full available price history	3.98	—	—

Drawdowns

AUSM vs. IBMM - Drawdown Comparison

The maximum AUSM drawdown since its inception was -0.42%, which is greater than IBMM's maximum drawdown of 0.00%. Use the drawdown chart below to compare losses from any high point for AUSM and IBMM.

Drawdown Indicators

	AUSM	IBMM	Difference
Max Drawdown Largest peak-to-trough decline	-0.42%	0.00%	-0.42%
Current Drawdown Current decline from peak	-0.02%	0.00%	-0.02%
Average Drawdown Average peak-to-trough decline	-0.09%	0.00%	-0.09%

Volatility

Volatility by Period

	AUSM	IBMM	Difference
Volatility (1Y) Calculated over the trailing 1-year period	0.73%	0.00%	+0.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.73%	0.00%	+0.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.73%	0.00%	+0.73%

AUSM vs. IBMM - Expense Ratio Comparison

Both AUSM and IBMM have an expense ratio of 0.18%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

AUSM vs. IBMM - Dividend Comparison

AUSM's dividend yield for the trailing twelve months is around 2.39%, while IBMM has not paid dividends to shareholders.

Position	TTM	2025
AUSM Allspring Ultra Short Municipal ETF	2.39%	1.26%
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%	0.00%

Frequently Asked Questions

Which ETF is better, AUSM or IBMM?

Both ETFs have the same 0.18% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, AUSM or IBMM?

AUSM and IBMM have the same expense ratio: 0.18% per year.

Which ETF pays a higher dividend yield, AUSM or IBMM?

AUSM has the higher dividend yield at 2.39%, compared with 0.00% for IBMM.

What is the main difference between AUSM and IBMM?

They also come from different issuers: Allspring and iShares.