IBMM vs. DFNM

Last updated Apr 1, 2026

Compare and contrast key facts about iShares iBonds Dec 2024 Term Muni Bond ETF (IBMM) and Dimensional National Municipal Bond ETF (DFNM).

IBMM and DFNM are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. IBMM is a passively managed fund by iShares that tracks the performance of the S&P AMT-Free Municipal Series Dec 2024 Index. It was launched on Mar 20, 2018. DFNM is an actively managed fund by Dimensional. It was launched on Nov 15, 2021.

Performance

IBMM vs. DFNM - Performance Comparison

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

IBMM vs. DFNM - Yearly Performance Comparison

	2026 (YTD)
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%
DFNM Dimensional National Municipal Bond ETF	-0.97%

Returns By Period

IBMM

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

DFNM

• 1D: 0.17%
• 1M: -1.55%
• YTD: 0.08%
• 6M: 1.40%
• 1Y: 3.80%
• 3Y*: 2.47%
• 5Y*: —
• 10Y*: —

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

IBMM vs. DFNM - Expense Ratio Comparison

IBMM has a 0.18% expense ratio, which is higher than DFNM's 0.17% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

IBMM

iShares iBonds Dec 2024 Term Muni Bond ETF

DFNM

Dimensional National Municipal Bond ETF

Return for Risk

IBMM vs. DFNM — Risk / Return Rank

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

DFNM

DFNM Risk / Return Rank: 73
DFNM Sharpe Ratio Rank: 78
DFNM Sortino Ratio Rank: 73
DFNM Omega Ratio Rank: 87
DFNM Calmar Ratio Rank: 68
DFNM Martin Ratio Rank: 61

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.

IBMM vs. DFNM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2024 Term Muni Bond ETF (IBMM) and Dimensional National Municipal Bond ETF (DFNM). 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

	IBMM	DFNM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.46	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.48	—

Dividends

IBMM vs. DFNM - Dividend Comparison

IBMM has not paid dividends to shareholders, while DFNM's dividend yield for the trailing twelve months is around 2.97%.

	TTM	2025	2024	2023	2022	2021
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
DFNM Dimensional National Municipal Bond ETF	2.97%	2.94%	2.74%	2.39%	1.16%	0.05%

Drawdowns

IBMM vs. DFNM - Drawdown Comparison

The maximum IBMM drawdown since its inception was 0.00%, smaller than the maximum DFNM drawdown of -6.99%. Use the drawdown chart below to compare losses from any high point for IBMM and DFNM.

Drawdown Indicators

	IBMM	DFNM	Difference
Max Drawdown Largest peak-to-trough decline	0.00%	-6.99%	+6.99%
Max Drawdown (1Y) Largest decline over 1 year	—	-2.34%	—
Current Drawdown Current decline from peak	0.00%	-1.55%	+1.55%
Average Drawdown Average peak-to-trough decline	0.00%	-2.01%	+2.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.67%	—

Volatility

Volatility by Period

	IBMM	DFNM	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.86%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.22%	—
Volatility (1Y) Calculated over the trailing 1-year period	0.00%	2.62%	-2.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.00%	2.57%	-2.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.00%	2.57%	-2.57%