OBIL vs. BUCK

Last updated Apr 1, 2026

Compare and contrast key facts about US Treasury 12 Month Bill ETF (OBIL) and Simplify Stable Income ETF (BUCK).

OBIL and BUCK are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. OBIL is a passively managed fund by US Benchmark Series that tracks the performance of the ICE BofA US 1-Year Treasury Bill Index - Benchmark TR Gross. It was launched on Nov 14, 2022. BUCK is an actively managed fund by Simplify. It was launched on Oct 27, 2022.

Performance

OBIL vs. BUCK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in US Treasury 12 Month Bill ETF (OBIL) and Simplify Stable Income ETF (BUCK). The values are adjusted to include any dividend payments, if applicable.

OBIL vs. BUCK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
OBIL US Treasury 12 Month Bill ETF	0.63%	4.19%	4.94%	4.69%	0.53%
BUCK Simplify Stable Income ETF	1.15%	4.13%	7.25%	4.63%	0.67%

Returns By Period

In the year-to-date period, OBIL achieves a 0.63% return, which is significantly lower than BUCK's 1.15% return.

OBIL

• 1D: 0.03%
• 1M: 0.11%
• YTD: 0.63%
• 6M: 1.60%
• 1Y: 3.85%
• 3Y*: 4.41%
• 5Y*: —
• 10Y*: —

BUCK

• 1D: 0.17%
• 1M: 0.19%
• YTD: 1.15%
• 6M: 2.45%
• 1Y: 2.84%
• 3Y*: 5.36%
• 5Y*: —
• 10Y*: —

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

OBIL vs. BUCK - Expense Ratio Comparison

OBIL has a 0.15% expense ratio, which is lower than BUCK's 0.35% expense ratio.

BUCK

Simplify Stable Income ETF

OBIL

US Treasury 12 Month Bill ETF

Return for Risk

OBIL vs. BUCK — Risk / Return Rank

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

OBIL

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

BUCK

BUCK Risk / Return Rank: 26
BUCK Sharpe Ratio Rank: 30
BUCK Sortino Ratio Rank: 25
BUCK Omega Ratio Rank: 28
BUCK Calmar Ratio Rank: 23
BUCK Martin Ratio Rank: 21

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.

OBIL vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for US Treasury 12 Month Bill ETF (OBIL) and Simplify Stable 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.

	OBIL	BUCK	Difference
Sharpe ratio Return per unit of total volatility	6.69	0.59	+6.10
Sortino ratio Return per unit of downside risk	14.31	0.76	+13.54
Omega ratio Gain probability vs. loss probability	3.34	1.12	+2.22
Calmar ratio Return relative to maximum drawdown	27.71	0.52	+27.19
Martin ratio Return relative to average drawdown	108.97	1.39	+107.58
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OBIL vs. BUCK - Sharpe Ratio Comparison

The current OBIL Sharpe Ratio is 6.69, which is higher than the BUCK Sharpe Ratio of 0.59. The chart below compares the historical Sharpe Ratios of OBIL and BUCK, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	OBIL	BUCK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	6.69	0.59	+6.10
Sharpe Ratio (All Time) Calculated using the full available price history	5.36	1.45	+3.90

Correlation

The correlation between OBIL and BUCK is 0.05, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

OBIL vs. BUCK - Dividend Comparison

OBIL's dividend yield for the trailing twelve months is around 4.04%, less than BUCK's 7.56% yield.

	TTM	2025	2024	2023	2022
OBIL US Treasury 12 Month Bill ETF	3.70%	3.83%	4.56%	4.92%	0.52%
BUCK Simplify Stable Income ETF	7.56%	7.59%	8.84%	4.84%	0.59%

Drawdowns

OBIL vs. BUCK - Drawdown Comparison

The maximum OBIL drawdown since its inception was -0.33%, smaller than the maximum BUCK drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for OBIL and BUCK.

Drawdown Indicators

	OBIL	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-0.33%	-5.43%	+5.10%
Max Drawdown (1Y) Largest decline over 1 year	-0.14%	-5.43%	+5.29%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.03%	-0.52%	+0.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.04%	2.04%	-2.00%

Volatility

OBIL vs. BUCK - Volatility Comparison

The current volatility for US Treasury 12 Month Bill ETF (OBIL) is 0.21%, while Simplify Stable Income ETF (BUCK) has a volatility of 0.37%. This indicates that OBIL 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

	OBIL	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.21%	0.37%	-0.16%
Volatility (6M) Calculated over the trailing 6-month period	0.35%	1.68%	-1.33%
Volatility (1Y) Calculated over the trailing 1-year period	0.58%	4.83%	-4.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.84%	3.55%	-2.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.84%	3.55%	-2.71%