GMMF vs. SBIL

Last updated Jul 22, 2026

GMMF (iShares Government Money Market ETF) and SBIL (Simplify Government Money Market ETF) are both Money Market funds. Both are actively managed. Over the past year, GMMF returned 3.75% vs 3.81% for SBIL. At a 0.14 correlation, their price movements are largely independent. GMMF charges 0.20%/yr vs 0.15%/yr for SBIL.

Performance

GMMF vs. SBIL - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with GMMF having a 1.92% return and SBIL slightly higher at 1.98%.

GMMF

• 1D: 0.01%
• 1M: 0.30%
• 6M: 1.73%
• YTD: 1.92%
• 1Y: 3.75%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.88%

SBIL

• 1D: 0.01%
• 1M: 0.31%
• 6M: 1.78%
• YTD: 1.98%
• 1Y: 3.81%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.83%

*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)
GMMF iShares Government Money Market ETF	$1.99M	$2.53M	$3.36M

GMMF vs. SBIL - Yearly Performance Comparison

	2026 (YTD)	2025
GMMF iShares Government Money Market ETF	1.92%	1.88%
SBIL Simplify Government Money Market ETF	1.98%	1.88%

Correlation

The correlation between GMMF and SBIL is 0.13, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.13
Correlation (All Time) Calculated using the full available price history since Jul 15, 2025	0.14

Return for Risk

GMMF vs. SBIL — Risk / Return Rank

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

GMMF

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

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

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.

GMMF vs. SBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Government Money Market ETF (GMMF) and Simplify Government Money Market ETF (SBIL). 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.

	GMMF	SBIL	Difference
Sharpe ratio: Return per unit of total volatility	18.86	14.58	+4.28
Sortino ratio: Return per unit of downside risk	139.34	52.18	+87.16
Omega ratio: Gain probability vs. loss probability	40.52	11.70	+28.83
Calmar ratio: Return relative to maximum drawdown	251.61	127.87	+123.74
Martin ratio: Return relative to average drawdown	2,214.08	780.95	+1,433.13

GMMF vs. SBIL - Sharpe Ratio Comparison

The current GMMF Sharpe Ratio is 18.86, which is comparable to the SBIL Sharpe Ratio of 14.58. The chart below compares the historical Sharpe Ratios of GMMF and SBIL, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

GMMF vs. SBIL - Drawdown Comparison

The maximum GMMF drawdown since its inception was -0.03%, roughly equal to the maximum SBIL drawdown of -0.03%. Use the drawdown chart below to compare losses from any high point for GMMF and SBIL.

Drawdown Indicators

	GMMF	SBIL	Difference
Max Drawdown Largest peak-to-trough decline	-0.03%	-0.03%	0.00%
Max Drawdown (1Y) Largest decline over 1 year	-0.01%	-0.03%	+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%	0.00%	0.00%

Volatility

GMMF vs. SBIL - Volatility Comparison

iShares Government Money Market ETF (GMMF) has a higher volatility of 0.05% compared to Simplify Government Money Market ETF (SBIL) at 0.04%. This indicates that GMMF's price experiences larger fluctuations and is considered to be riskier than SBIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GMMF	SBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	0.04%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	0.13%	0.18%	-0.05%
Volatility (1Y) Calculated over the trailing 1-year period	0.20%	0.26%	-0.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.24%	0.26%	-0.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.24%	0.26%	-0.02%

GMMF vs. SBIL - Expense Ratio Comparison

GMMF has a 0.20% expense ratio, which is higher than SBIL's 0.15% 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%.

Dividends

GMMF vs. SBIL - Dividend Comparison

GMMF's dividend yield for the trailing twelve months is around 3.72%, more than SBIL's 3.55% yield.

Position	TTM	2025
GMMF iShares Government Money Market ETF	3.72%	3.45%
SBIL Simplify Government Money Market ETF	3.55%	1.79%

Frequently Asked Questions

Can I hold both GMMF and SBIL in my portfolio?

GMMF and SBIL have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, GMMF or SBIL?

GMMF has higher volatility (0.05%) compared to SBIL (0.04%). In terms of maximum drawdown, GMMF dropped -0.03% vs SBIL's -0.03%.

Which ETF is better, GMMF or SBIL?

On 1-year performance, SBIL leads with 3.81% vs 3.75% for GMMF. On fees, SBIL is cheaper at 0.15% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, GMMF or SBIL?

Over the 1-year period, SBIL has performed better with a 3.81% return vs 3.75%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, GMMF or SBIL?

SBIL is cheaper with a 0.15% expense ratio, compared with 0.20% for GMMF.

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

GMMF has the higher dividend yield at 3.72%, compared with 3.55% for SBIL.

What is the main difference between GMMF and SBIL?

They also come from different issuers: iShares and Simplify. Their fees differ too: 0.20% for GMMF and 0.15% for SBIL.

Which has better risk-adjusted returns?

GMMF currently has the higher Sharpe Ratio (18.86 vs 14.58), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.