PMMF vs. HYMU

Last updated Jun 3, 2026

PMMF (iShares Prime Money Market ETF) and HYMU (BlackRock High Yield Muni Income Bond ETF) are both exchange-traded funds - PMMF is a Money Market fund actively managed by BlackRock, while HYMU is a High Yield Muni fund actively managed by BlackRock. Both are actively managed. PMMF charges 0.20%/yr vs 0.35%/yr for HYMU.

Performance

PMMF vs. HYMU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Prime Money Market ETF (PMMF) and BlackRock High Yield Muni Income Bond ETF (HYMU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

PMMF

• 1D: 0.01%
• 1M: 0.31%
• YTD: 1.51%
• 6M: 1.82%
• 1Y: 4.01%
• 3Y*: —
• 5Y*: —
• 10Y*: —

HYMU

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

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

PMMF vs. HYMU - Yearly Performance Comparison

	2026 (YTD)
PMMF iShares Prime Money Market ETF	0.05%
HYMU BlackRock High Yield Muni Income Bond ETF	0.00%

Return for Risk

PMMF vs. HYMU — Risk / Return Rank

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

PMMF

PMMF Risk / Return Rank: 100
PMMF Sharpe Ratio Rank: 100
PMMF Sortino Ratio Rank: 100
PMMF Omega Ratio Rank: 100
PMMF Calmar Ratio Rank: 100
PMMF 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.

PMMF vs. HYMU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Prime Money Market ETF (PMMF) and BlackRock High Yield Muni Income Bond ETF (HYMU). 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.

	PMMF	HYMU	Difference
Sharpe ratio Return per unit of total volatility	19.78	—	—
Sortino ratio Return per unit of downside risk	95.43	—	—
Omega ratio Gain probability vs. loss probability	38.46	—	—
Calmar ratio Return relative to maximum drawdown	162.38	—	—
Martin ratio Return relative to average drawdown	1,502.39	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	PMMF	HYMU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	19.78	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	11.98	—	—

Drawdowns

PMMF vs. HYMU - Drawdown Comparison

The maximum PMMF drawdown since its inception was -0.13%, which is greater than HYMU's maximum drawdown of 0.00%. Use the drawdown chart below to compare losses from any high point for PMMF and HYMU.

Drawdown Indicators

	PMMF	HYMU	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	0.00%	-0.13%
Max Drawdown (1Y) Largest decline over 1 year	-0.02%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.00%	0.00%	0.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.00%	—	—

Volatility

Volatility by Period

	PMMF	HYMU	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	—	—
Volatility (6M) Calculated over the trailing 6-month period	0.12%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	0.20%	0.00%	+0.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.34%	0.00%	+0.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.34%	0.00%	+0.34%

PMMF vs. HYMU - Expense Ratio Comparison

PMMF has a 0.20% expense ratio, which is lower than HYMU's 0.35% expense ratio.

Dividends

PMMF vs. HYMU - Dividend Comparison

PMMF's dividend yield for the trailing twelve months is around 3.76%, while HYMU has not paid dividends to shareholders.

Position	TTM	2025
HYMU BlackRock High Yield Muni Income Bond ETF	0.00%	0.00%
PMMF iShares Prime Money Market ETF	3.76%	3.59%

Frequently Asked Questions

Which ETF is better, PMMF or HYMU?

On fees, PMMF is cheaper at 0.20% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, PMMF or HYMU?

PMMF is cheaper with a 0.20% expense ratio, compared with 0.35% for HYMU.

Which ETF pays a higher dividend yield, PMMF or HYMU?

PMMF has the higher dividend yield at 3.76%, compared with 0.00% for HYMU.

What is the main difference between PMMF and HYMU?

PMMF is categorized as Money Market, while HYMU is High Yield Muni. Their fees differ too: 0.20% for PMMF and 0.35% for HYMU.