SBIL vs. MMK

Last updated Aug 1, 2026

SBIL (Simplify Government Money Market ETF) and MMK (State Street Prime Money Market ETF) are both Money Market funds. Both are actively managed. Their 0.11 correlation means their historical movements had little consistent relationship. SBIL charges 0.15%/yr vs 0.18%/yr for MMK.

Performance

SBIL vs. MMK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Simplify Government Money Market ETF (SBIL) and State Street Prime Money Market ETF (MMK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

SBIL

• 1D: 0.02%
• 1M: 0.31%
• 6M: 1.75%
• YTD: 2.09%
• 1Y: 3.85%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.84%

MMK

• 1D: 0.04%
• 1M: 0.29%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
MMK State Street Prime Money Market ETF	$172.00K	$210.46K	$196.21K
SBIL Simplify Government Money Market ETF	$31.14M	$24.02M	$26.67M

SBIL vs. MMK - Yearly Performance Comparison

	2026 (YTD)
SBIL Simplify Government Money Market ETF	1.68%
MMK State Street Prime Money Market ETF	1.70%

Correlation

The correlation between SBIL and MMK is 0.11, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (All Time) Calculated using the full available price history since Feb 12, 2026	0.11

Return for Risk

SBIL vs. MMK — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

SBIL

SBIL Risk / Return Rank: 100
SBIL Sharpe Ratio Rank: 100
SBIL Sortino Ratio Rank: 100
SBIL Omega Ratio Rank: 100
SBIL Calmar Ratio Rank: 100
SBIL Martin Ratio Rank: 100

MMK

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

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

SBIL vs. MMK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Simplify Government Money Market ETF (SBIL) and State Street Prime Money Market ETF (MMK). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	SBIL	MMK	Difference
Sharpe ratio: Return per unit of total volatility	15.08	—	—
Sortino ratio: Return per unit of downside risk	58.38	—	—
Omega ratio: Gain probability vs. loss probability	12.98	—	—
Calmar ratio: Return relative to maximum drawdown	154.53	—	—
Martin ratio: Return relative to average drawdown	868.15	—	—

Drawdowns

SBIL vs. MMK - Drawdown Comparison

The maximum SBIL drawdown since its inception was -0.03%, which is greater than MMK's maximum drawdown of -0.01%. Use the drawdown chart below to compare losses from any high point for SBIL and MMK.

Drawdown Indicators

	SBIL	MMK	Difference
Max Drawdown Largest peak-to-trough decline	-0.03%	-0.01%	-0.02%
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

	SBIL	MMK	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	—	—
Volatility (6M) Calculated over the trailing 6-month period	0.18%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	0.26%	0.18%	+0.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.26%	0.18%	+0.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.26%	0.18%	+0.08%

SBIL vs. MMK - Expense Ratio Comparison

SBIL has a 0.15% expense ratio, which is lower than MMK's 0.18% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

SBIL vs. MMK - Dividend Comparison

SBIL's dividend yield for the trailing twelve months is around 3.87%, more than MMK's 1.37% yield.

Position	TTM	2025
MMK State Street Prime Money Market ETF	1.37%	0.00%
SBIL Simplify Government Money Market ETF	3.87%	1.79%

Frequently Asked Questions

Can I hold both SBIL and MMK in my portfolio?

SBIL and MMK have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, SBIL or MMK?

On fees, SBIL is cheaper at 0.15% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, SBIL or MMK?

SBIL is cheaper with a 0.15% expense ratio, compared with 0.18% for MMK.

Which ETF pays a higher dividend yield, SBIL or MMK?

SBIL has the higher dividend yield at 3.87%, compared with 1.37% for MMK.

What is the main difference between SBIL and MMK?

They also come from different issuers: Simplify and State Street. Their fees differ too: 0.15% for SBIL and 0.18% for MMK.