GMOC vs. BUCK

Last updated Jun 26, 2026

GMOC (GMO Ultra-Short Income ETF) and BUCK (Simplify Treasury Option Income ETF) are both exchange-traded funds - GMOC is a Ultrashort Bond fund actively managed by GMO, while BUCK is a Government Bonds fund actively managed by Simplify. Both are actively managed. At a 0.10 correlation, their price movements are largely independent. GMOC charges 0.20%/yr vs 0.35%/yr for BUCK.

Performance

GMOC vs. BUCK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in GMO Ultra-Short Income ETF (GMOC) and Simplify Treasury Option Income ETF (BUCK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, GMOC achieves a 1.85% return, which is significantly lower than BUCK's 2.14% return.

GMOC

• 1D: -0.02%
• 1M: 0.35%
• YTD: 1.85%
• 6M: 1.96%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

BUCK

• 1D: 0.06%
• 1M: 0.19%
• YTD: 2.14%
• 6M: 2.25%
• 1Y: 6.14%
• 3Y*: 5.23%
• 5Y*: —
• 10Y*: —

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

GMOC vs. BUCK - Yearly Performance Comparison

	2026 (YTD)	2025
GMOC GMO Ultra-Short Income ETF	1.85%	0.70%
BUCK Simplify Treasury Option Income ETF	2.14%	0.61%

Correlation

The correlation between GMOC and BUCK is 0.10, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Oct 28, 2025	0.10

Return for Risk

GMOC vs. BUCK — Risk / Return Rank

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

GMOC

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

BUCK

BUCK Risk / Return Rank: 84
BUCK Sharpe Ratio Rank: 75
BUCK Sortino Ratio Rank: 78
BUCK Omega Ratio Rank: 84
BUCK Calmar Ratio Rank: 89
BUCK Martin Ratio Rank: 95

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.

GMOC vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for GMO Ultra-Short Income ETF (GMOC) and Simplify Treasury Option Income ETF (BUCK). 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.

	GMOC	BUCK	Difference
Sharpe ratio: Return per unit of total volatility	—	2.09	—
Sortino ratio: Return per unit of downside risk	—	3.04	—
Omega ratio: Gain probability vs. loss probability	—	1.44	—
Calmar ratio: Return relative to maximum drawdown	—	4.71	—
Martin ratio: Return relative to average drawdown	—	25.53	—

Drawdowns

GMOC vs. BUCK - Drawdown Comparison

The maximum GMOC drawdown since its inception was -0.14%, smaller than the maximum BUCK drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for GMOC and BUCK.

Drawdown Indicators

	GMOC	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-0.14%	-5.43%	+5.29%
Max Drawdown (1Y) Largest decline over 1 year	—	-1.31%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-5.43%	—
Current Drawdown Current decline from peak	-0.02%	-0.15%	+0.13%
Average Drawdown Average peak-to-trough decline	-0.01%	-0.49%	+0.48%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.24%	—

Volatility

Volatility by Period

	GMOC	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.39%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.39%	—
Volatility (1Y) Calculated over the trailing 1-year period	0.50%	2.97%	-2.47%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.50%	3.46%	-2.96%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.50%	3.46%	-2.96%

GMOC vs. BUCK - Expense Ratio Comparison

GMOC has a 0.20% expense ratio, which is lower than BUCK's 0.35% expense ratio.

Dividends

GMOC vs. BUCK - Dividend Comparison

GMOC's dividend yield for the trailing twelve months is around 2.33%, less than BUCK's 7.31% yield.

Position	TTM	2025	2024	2023	2022
BUCK Simplify Treasury Option Income ETF	7.31%	7.59%	8.84%	4.84%	0.59%
GMOC GMO Ultra-Short Income ETF	2.33%	0.84%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both GMOC and BUCK in my portfolio?

GMOC and BUCK have a correlation of 0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, GMOC or BUCK?

On fees, GMOC 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, GMOC or BUCK?

GMOC is cheaper with a 0.20% expense ratio, compared with 0.35% for BUCK.

Which ETF pays a higher dividend yield, GMOC or BUCK?

BUCK has the higher dividend yield at 7.31%, compared with 2.33% for GMOC.

What is the main difference between GMOC and BUCK?

GMOC is categorized as Ultrashort Bond, while BUCK is Government Bonds. They also come from different issuers: GMO and Simplify. Their fees differ too: 0.20% for GMOC and 0.35% for BUCK.