GSY vs. BUCK

Last updated Jun 23, 2026

GSY (Invesco Ultra Short Duration ETF) and BUCK (Simplify Treasury Option Income ETF) are both exchange-traded funds - GSY is a Ultrashort Bond fund actively managed by Invesco, while BUCK is a Government Bonds fund actively managed by Simplify. Both are actively managed. Over the past 3 years, GSY returned 5.42%/yr vs 5.23%/yr for BUCK. At a 0.03 correlation, their price movements are largely independent. GSY charges 0.22%/yr vs 0.35%/yr for BUCK.

Performance

GSY vs. BUCK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Ultra Short Duration ETF (GSY) 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, GSY achieves a 1.79% return, which is significantly lower than BUCK's 2.07% return.

GSY

• 1D: 0.03%
• 1M: 0.35%
• YTD: 1.79%
• 6M: 1.87%
• 1Y: 4.45%
• 3Y*: 5.42%
• 5Y*: 3.69%
• 10Y*: 2.86%

BUCK

• 1D: -0.09%
• 1M: 0.17%
• YTD: 2.07%
• 6M: 2.14%
• 1Y: 6.97%
• 3Y*: 5.23%
• 5Y*: —
• 10Y*: —

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

GSY vs. BUCK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
GSY Invesco Ultra Short Duration ETF	1.79%	4.96%	5.95%	5.99%	1.04%
BUCK Simplify Treasury Option Income ETF	2.07%	4.13%	7.25%	4.63%	0.59%

Correlation

The correlation between GSY and BUCK is 0.06, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.06
Correlation (3Y) Calculated over the trailing 3-year period	0.05
Correlation (All Time) Calculated using the full available price history since Oct 28, 2022	0.03

Return for Risk

GSY vs. BUCK — Risk / Return Rank

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

GSY

GSY Risk / Return Rank: 99
GSY Sharpe Ratio Rank: 99
GSY Sortino Ratio Rank: 99
GSY Omega Ratio Rank: 99
GSY Calmar Ratio Rank: 100
GSY Martin Ratio Rank: 100

BUCK

BUCK Risk / Return Rank: 86
BUCK Sharpe Ratio Rank: 77
BUCK Sortino Ratio Rank: 81
BUCK Omega Ratio Rank: 86
BUCK Calmar Ratio Rank: 90
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.

GSY vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Ultra Short Duration ETF (GSY) 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.

	GSY	BUCK	Difference
Sharpe ratio: Return per unit of total volatility	10.83	2.35	+8.48
Sortino ratio: Return per unit of downside risk	25.27	3.46	+21.82
Omega ratio: Gain probability vs. loss probability	6.07	1.50	+4.57
Calmar ratio: Return relative to maximum drawdown	74.56	5.35	+69.20
Martin ratio: Return relative to average drawdown	349.93	28.90	+321.03

GSY vs. BUCK - Sharpe Ratio Comparison

The current GSY Sharpe Ratio is 10.83, which is higher than the BUCK Sharpe Ratio of 2.35. The chart below compares the historical Sharpe Ratios of GSY and BUCK, 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

GSY vs. BUCK - Drawdown Comparison

The maximum GSY drawdown since its inception was -12.14%, which is greater than BUCK's maximum drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for GSY and BUCK.

Drawdown Indicators

	GSY	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-12.14%	-5.43%	-6.71%
Max Drawdown (1Y) Largest decline over 1 year	-0.06%	-1.31%	+1.25%
Max Drawdown (3Y) Largest decline over 3 years	-0.18%	-5.43%	+5.25%
Max Drawdown (5Y) Largest decline over 5 years	-1.48%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-5.25%	—	—
Current Drawdown Current decline from peak	0.00%	-0.09%	+0.09%
Average Drawdown Average peak-to-trough decline	-2.38%	-0.49%	-1.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.24%	-0.23%

Volatility

GSY vs. BUCK - Volatility Comparison

The current volatility for Invesco Ultra Short Duration ETF (GSY) is 0.15%, while Simplify Treasury Option Income ETF (BUCK) has a volatility of 0.28%. This indicates that GSY experiences smaller price fluctuations and is considered to be less risky than BUCK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GSY	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.15%	0.28%	-0.13%
Volatility (6M) Calculated over the trailing 6-month period	0.31%	1.38%	-1.07%
Volatility (1Y) Calculated over the trailing 1-year period	0.41%	2.98%	-2.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.58%	3.46%	-2.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.22%	3.46%	-2.24%

GSY vs. BUCK - Expense Ratio Comparison

GSY has a 0.22% expense ratio, which is lower than BUCK's 0.35% expense ratio.

Dividends

GSY vs. BUCK - Dividend Comparison

GSY's dividend yield for the trailing twelve months is around 4.70%, less than BUCK's 7.40% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUCK Simplify Treasury Option Income ETF	7.40%	7.59%	8.84%	4.84%	0.59%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
GSY Invesco Ultra Short Duration ETF	4.70%	4.56%	5.31%	4.95%	1.70%	0.58%	1.45%	2.71%	2.30%	1.80%	1.21%	1.17%

Frequently Asked Questions

Can I hold both GSY and BUCK in my portfolio?

GSY and BUCK have a correlation of 0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, GSY or BUCK?

BUCK has higher volatility (0.28%) compared to GSY (0.15%). In terms of maximum drawdown, GSY dropped -12.14% vs BUCK's -5.43%.

Which ETF is better, GSY or BUCK?

On 3-year performance, GSY leads with 5.42% vs 5.23% for BUCK. On fees, GSY is cheaper at 0.22% per year. On volatility, GSY has been the lower-risk option at 0.15%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, GSY or BUCK?

Over the 3-year period, GSY has performed better with a 5.42% return vs 5.23%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, GSY or BUCK?

GSY is cheaper with a 0.22% expense ratio, compared with 0.35% for BUCK.

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

BUCK has the higher dividend yield at 7.40%, compared with 4.70% for GSY.

What is the main difference between GSY and BUCK?

GSY is categorized as Ultrashort Bond, while BUCK is Government Bonds. They also come from different issuers: Invesco and Simplify. Their fees differ too: 0.22% for GSY and 0.35% for BUCK.

Which has better risk-adjusted returns?

GSY currently has the higher Sharpe Ratio (10.83 vs 2.35), 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.