PMMF vs. ZMMK.TO

Last updated Apr 1, 2026

Compare and contrast key facts about iShares Prime Money Market ETF (PMMF) and BMO Money Market Fund ETF Series (ZMMK.TO).

PMMF and ZMMK.TO are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. PMMF is an actively managed fund by BlackRock. It was launched on Feb 4, 2025. ZMMK.TO is an actively managed fund by BMO. It was launched on Nov 28, 2021.

Performance

PMMF vs. ZMMK.TO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Prime Money Market ETF (PMMF) and BMO Money Market Fund ETF Series (ZMMK.TO). The values are adjusted to include any dividend payments, if applicable.

PMMF vs. ZMMK.TO - Yearly Performance Comparison

	2026 (YTD)	2025
PMMF iShares Prime Money Market ETF	0.86%	3.85%
ZMMK.TO BMO Money Market Fund ETF Series	-0.71%	6.78%

Different Trading Currencies

PMMF is traded in USD, while ZMMK.TO is traded in CAD. To make them comparable, the ZMMK.TO values have been converted to USD using the latest available exchange rates.

Returns By Period

In the year-to-date period, PMMF achieves a 0.86% return, which is significantly higher than ZMMK.TO's -0.71% return.

PMMF

• 1D: 0.01%
• 1M: 0.28%
• YTD: 0.86%
• 6M: 1.87%
• 1Y: 4.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

ZMMK.TO

• 1D: 0.13%
• 1M: -1.66%
• YTD: -0.71%
• 6M: 1.32%
• 1Y: 6.17%
• 3Y*: 3.02%
• 5Y*: —
• 10Y*: —

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

PMMF vs. ZMMK.TO - Expense Ratio Comparison

PMMF has a 0.20% expense ratio, which is higher than ZMMK.TO's 0.13% 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%.

PMMF

iShares Prime Money Market ETF

ZMMK.TO

BMO Money Market Fund ETF Series

Return for Risk

PMMF vs. ZMMK.TO — 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: 99
PMMF Martin Ratio Rank: 100

ZMMK.TO

ZMMK.TO Risk / Return Rank: 100
ZMMK.TO Sharpe Ratio Rank: 100
ZMMK.TO Sortino Ratio Rank: 100
ZMMK.TO Omega Ratio Rank: 100
ZMMK.TO Calmar Ratio Rank: 100
ZMMK.TO 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. ZMMK.TO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Prime Money Market ETF (PMMF) and BMO Money Market Fund ETF Series (ZMMK.TO). 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	ZMMK.TO	Difference
Sharpe ratio Return per unit of total volatility	13.39	1.18	+12.21
Sortino ratio Return per unit of downside risk	25.27	1.94	+23.33
Omega ratio Gain probability vs. loss probability	11.71	1.22	+10.49
Calmar ratio Return relative to maximum drawdown	31.70	1.97	+29.73
Martin ratio Return relative to average drawdown	381.69	4.34	+377.35
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PMMF vs. ZMMK.TO - Sharpe Ratio Comparison

The current PMMF Sharpe Ratio is 13.39, which is higher than the ZMMK.TO Sharpe Ratio of 1.18. The chart below compares the historical Sharpe Ratios of PMMF and ZMMK.TO, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	PMMF	ZMMK.TO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	13.39	1.18	+12.21
Sharpe Ratio (All Time) Calculated using the full available price history	11.51	0.25	+11.26

Correlation

The correlation between PMMF and ZMMK.TO is -0.06. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.

Dividends

PMMF vs. ZMMK.TO - Dividend Comparison

PMMF's dividend yield for the trailing twelve months is around 3.91%, more than ZMMK.TO's 2.68% yield.

	TTM	2025	2024	2023	2022	2021
PMMF iShares Prime Money Market ETF	3.91%	3.59%	0.00%	0.00%	0.00%	0.00%
ZMMK.TO BMO Money Market Fund ETF Series	2.68%	3.02%	4.66%	4.98%	1.95%	0.04%

Drawdowns

PMMF vs. ZMMK.TO - Drawdown Comparison

The maximum PMMF drawdown since its inception was -0.13%, smaller than the maximum ZMMK.TO drawdown of -9.20%. Use the drawdown chart below to compare losses from any high point for PMMF and ZMMK.TO.

Drawdown Indicators

	PMMF	ZMMK.TO	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-0.16%	+0.03%
Max Drawdown (1Y) Largest decline over 1 year	-0.13%	-0.03%	-0.10%
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	0.01%	0.01%	0.00%

Volatility

PMMF vs. ZMMK.TO - Volatility Comparison

The current volatility for iShares Prime Money Market ETF (PMMF) is 0.05%, while BMO Money Market Fund ETF Series (ZMMK.TO) has a volatility of 1.40%. This indicates that PMMF experiences smaller price fluctuations and is considered to be less risky than ZMMK.TO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PMMF	ZMMK.TO	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	1.40%	-1.35%
Volatility (6M) Calculated over the trailing 6-month period	0.13%	3.35%	-3.22%
Volatility (1Y) Calculated over the trailing 1-year period	0.31%	5.26%	-4.95%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.36%	6.30%	-5.94%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.36%	6.30%	-5.94%