BKUI vs. BUCK

Last updated Jun 23, 2026

BKUI (BNY Mellon Ultra Short Income ETF) and BUCK (Simplify Treasury Option Income ETF) are both exchange-traded funds - BKUI is a Ultrashort Bond fund actively managed by BNY Mellon, while BUCK is a Government Bonds fund actively managed by Simplify. Both are actively managed. Over the past 3 years, BKUI returned 5.11%/yr vs 5.23%/yr for BUCK. At a 0.05 correlation, their price movements are largely independent. BKUI charges 0.12%/yr vs 0.35%/yr for BUCK.

Performance

BKUI vs. BUCK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BNY Mellon Ultra Short Income ETF (BKUI) 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, BKUI achieves a 1.49% return, which is significantly lower than BUCK's 2.07% return.

BKUI

• 1D: -0.01%
• 1M: 0.25%
• YTD: 1.49%
• 6M: 1.60%
• 1Y: 4.12%
• 3Y*: 5.11%
• 5Y*: —
• 10Y*: —

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)

BKUI vs. BUCK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
BKUI BNY Mellon Ultra Short Income ETF	1.49%	4.93%	5.50%	5.75%	0.94%
BUCK Simplify Treasury Option Income ETF	2.07%	4.13%	7.25%	4.63%	0.59%

Correlation

The correlation between BKUI and BUCK is 0.05, 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	0.05
Correlation (3Y) Calculated over the trailing 3-year period	0.08
Correlation (All Time) Calculated using the full available price history since Oct 28, 2022	0.05

Return for Risk

BKUI vs. BUCK — Risk / Return Rank

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

BKUI

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

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.

BKUI vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BNY Mellon Ultra Short Income ETF (BKUI) 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.

	BKUI	BUCK	Difference
Sharpe ratio: Return per unit of total volatility	9.91	2.35	+7.55
Sortino ratio: Return per unit of downside risk	22.44	3.46	+18.98
Omega ratio: Gain probability vs. loss probability	5.43	1.50	+3.92
Calmar ratio: Return relative to maximum drawdown	31.06	5.35	+25.70
Martin ratio: Return relative to average drawdown	211.18	28.90	+182.27

BKUI vs. BUCK - Sharpe Ratio Comparison

The current BKUI Sharpe Ratio is 9.91, which is higher than the BUCK Sharpe Ratio of 2.35. The chart below compares the historical Sharpe Ratios of BKUI 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

BKUI vs. BUCK - Drawdown Comparison

The maximum BKUI drawdown since its inception was -1.72%, smaller than the maximum BUCK drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for BKUI and BUCK.

Drawdown Indicators

	BKUI	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-1.72%	-5.43%	+3.71%
Max Drawdown (1Y) Largest decline over 1 year	-0.13%	-1.31%	+1.18%
Max Drawdown (3Y) Largest decline over 3 years	-0.25%	-5.43%	+5.18%
Current Drawdown Current decline from peak	-0.05%	-0.09%	+0.04%
Average Drawdown Average peak-to-trough decline	-0.27%	-0.49%	+0.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.02%	0.24%	-0.22%

Volatility

BKUI vs. BUCK - Volatility Comparison

The current volatility for BNY Mellon Ultra Short Income ETF (BKUI) is 0.17%, while Simplify Treasury Option Income ETF (BUCK) has a volatility of 0.28%. This indicates that BKUI 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

	BKUI	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.17%	0.28%	-0.11%
Volatility (6M) Calculated over the trailing 6-month period	0.33%	1.38%	-1.05%
Volatility (1Y) Calculated over the trailing 1-year period	0.42%	2.98%	-2.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.59%	3.46%	-2.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.59%	3.46%	-2.87%

BKUI vs. BUCK - Expense Ratio Comparison

BKUI has a 0.12% expense ratio, which is lower than BUCK's 0.35% expense ratio.

Dividends

BKUI vs. BUCK - Dividend Comparison

BKUI's dividend yield for the trailing twelve months is around 4.21%, less than BUCK's 7.40% yield.

Position	TTM	2025	2024	2023	2022	2021
BKUI BNY Mellon Ultra Short Income ETF	4.21%	4.48%	5.11%	4.29%	1.82%	0.22%
BUCK Simplify Treasury Option Income ETF	7.40%	7.59%	8.84%	4.84%	0.59%	0.00%

Frequently Asked Questions

Can I hold both BKUI and BUCK in my portfolio?

BKUI and BUCK have a correlation of 0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BKUI or BUCK?

BUCK has higher volatility (0.28%) compared to BKUI (0.17%). In terms of maximum drawdown, BKUI dropped -1.72% vs BUCK's -5.43%.

Which ETF is better, BKUI or BUCK?

On 3-year performance, BUCK leads with 5.23% vs 5.11% for BKUI. On fees, BKUI is cheaper at 0.12% per year. On volatility, BKUI has been the lower-risk option at 0.17%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, BKUI or BUCK?

Over the 3-year period, BUCK has performed better with a 5.23% return vs 5.11%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, BKUI or BUCK?

BKUI is cheaper with a 0.12% expense ratio, compared with 0.35% for BUCK.

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

BUCK has the higher dividend yield at 7.40%, compared with 4.21% for BKUI.

What is the main difference between BKUI and BUCK?

BKUI is categorized as Ultrashort Bond, while BUCK is Government Bonds. They also come from different issuers: BNY Mellon and Simplify. Their fees differ too: 0.12% for BKUI and 0.35% for BUCK.

Which has better risk-adjusted returns?

BKUI currently has the higher Sharpe Ratio (9.90 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.