IBMM vs. FXAIX

Last updated Apr 1, 2026

Compare and contrast key facts about iShares iBonds Dec 2024 Term Muni Bond ETF (IBMM) and Fidelity 500 Index Fund (FXAIX).

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. FXAIX is a passively managed fund by Fidelity that tracks the performance of the S&P 500 Index. It was launched on Feb 17, 1988. Both IBMM and FXAIX are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

IBMM vs. FXAIX - 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 Fidelity 500 Index Fund (FXAIX). The values are adjusted to include any dividend payments, if applicable.

IBMM vs. FXAIX - Yearly Performance Comparison

	2026 (YTD)
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%
FXAIX Fidelity 500 Index Fund	-8.30%

Returns By Period

IBMM

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

FXAIX

• 1D: -0.39%
• 1M: -7.68%
• YTD: -7.05%
• 6M: -4.59%
• 1Y: 14.42%
• 3Y*: 17.17%
• 5Y*: 11.40%
• 10Y*: 13.75%

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

IBMM vs. FXAIX - Expense Ratio Comparison

IBMM has a 0.18% expense ratio, which is higher than FXAIX's 0.02% 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

FXAIX

Fidelity 500 Index Fund

Return for Risk

IBMM vs. FXAIX — Risk / Return Rank

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

FXAIX

FXAIX Risk / Return Rank: 46
FXAIX Sharpe Ratio Rank: 41
FXAIX Sortino Ratio Rank: 45
FXAIX Omega Ratio Rank: 50
FXAIX Calmar Ratio Rank: 41
FXAIX Martin Ratio Rank: 53

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. FXAIX - 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 Fidelity 500 Index Fund (FXAIX). 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	FXAIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	0.84	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.68	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.77	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.75	—

Dividends

IBMM vs. FXAIX - Dividend Comparison

IBMM has not paid dividends to shareholders, while FXAIX's dividend yield for the trailing twelve months is around 1.20%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IBMM iShares iBonds Dec 2024 Term Muni Bond ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FXAIX Fidelity 500 Index Fund	1.20%	1.11%	1.25%	1.45%	1.69%	1.22%	1.60%	2.06%	2.72%	1.97%	2.52%	2.83%

Drawdowns

IBMM vs. FXAIX - Drawdown Comparison

The maximum IBMM drawdown since its inception was 0.00%, smaller than the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for IBMM and FXAIX.

Drawdown Indicators

	IBMM	FXAIX	Difference
Max Drawdown Largest peak-to-trough decline	0.00%	-33.79%	+33.79%
Max Drawdown (1Y) Largest decline over 1 year	—	-12.13%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.79%	—
Current Drawdown Current decline from peak	0.00%	-8.89%	+8.89%
Average Drawdown Average peak-to-trough decline	0.00%	-3.83%	+3.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	2.50%	—

Volatility

Volatility by Period

	IBMM	FXAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.24%	—
Volatility (6M) Calculated over the trailing 6-month period	—	9.08%	—
Volatility (1Y) Calculated over the trailing 1-year period	0.00%	18.13%	-18.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.00%	16.88%	-16.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.00%	18.03%	-18.03%