ATCL vs. BUCK

Last updated Aug 1, 2026

ATCL (REX Autocallable Income ETF) and BUCK (Simplify Treasury Option Income ETF) are both exchange-traded funds - ATCL is a Derivative Income fund actively managed by REX Shares, while BUCK is a Government Bonds fund actively managed by Simplify. Both are actively managed. Their 0.19 correlation means their historical movements had little consistent relationship. ATCL charges 0.65%/yr vs 0.35%/yr for BUCK.

Performance

ATCL vs. BUCK - Performance Comparison

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

Returns By Period

ATCL

• 1D: 0.62%
• 1M: 0.73%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

BUCK

• 1D: -0.04%
• 1M: 0.17%
• 6M: 1.84%
• YTD: 2.42%
• 1Y: 5.36%
• 3Y*: 5.15%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 5.06%

*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)
ATCL REX Autocallable Income ETF	$407.20K	$547.21K	$849.08K
BUCK Simplify Treasury Option Income ETF	$3.71M	$3.63M	$3.94M

ATCL vs. BUCK - Yearly Performance Comparison

	2026 (YTD)
ATCL REX Autocallable Income ETF	4.45%
BUCK Simplify Treasury Option Income ETF	1.84%

Correlation

The correlation between ATCL and BUCK is 0.19, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (All Time) Calculated using the full available price history since Feb 18, 2026	0.19

Return for Risk

ATCL vs. BUCK — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

ATCL

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

BUCK

BUCK Risk / Return Rank: 95
BUCK Sharpe Ratio Rank: 92
BUCK Sortino Ratio Rank: 93
BUCK Omega Ratio Rank: 94
BUCK Calmar Ratio Rank: 97
BUCK Martin Ratio Rank: 97

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

ATCL vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX Autocallable Income ETF (ATCL) 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.

	ATCL	BUCK	Difference
Sharpe ratio: Return per unit of total volatility	—	2.41	—
Sortino ratio: Return per unit of downside risk	—	3.58	—
Omega ratio: Gain probability vs. loss probability	—	1.52	—
Calmar ratio: Return relative to maximum drawdown	—	7.39	—
Martin ratio: Return relative to average drawdown	—	34.83	—

Drawdowns

ATCL vs. BUCK - Drawdown Comparison

The maximum ATCL drawdown since its inception was -6.08%, which is greater than BUCK's maximum drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for ATCL and BUCK.

Drawdown Indicators

	ATCL	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-6.08%	-5.43%	-0.65%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.84%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-5.43%	—
Current Drawdown Current decline from peak	-0.10%	-0.11%	+0.01%
Average Drawdown Average peak-to-trough decline	-0.73%	-0.47%	-0.26%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.18%	—

Volatility

Volatility by Period

	ATCL	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.39%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.24%	—
Volatility (1Y) Calculated over the trailing 1-year period	7.71%	2.59%	+5.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.71%	3.42%	+4.29%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.71%	3.42%	+4.29%

ATCL vs. BUCK - Expense Ratio Comparison

ATCL has a 0.65% expense ratio, which is higher than BUCK's 0.35% expense ratio.

Dividends

ATCL vs. BUCK - Dividend Comparison

ATCL's dividend yield for the trailing twelve months is around 5.72%, less than BUCK's 7.20% yield.

Position	TTM	2025	2024	2023	2022
ATCL REX Autocallable Income ETF	5.72%	0.00%	0.00%	0.00%	0.00%
BUCK Simplify Treasury Option Income ETF	7.20%	7.59%	8.84%	4.84%	0.59%

Frequently Asked Questions

Can I hold both ATCL and BUCK in my portfolio?

ATCL and BUCK have a correlation of 0.19, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, ATCL or BUCK?

On fees, BUCK is cheaper at 0.35% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, ATCL or BUCK?

BUCK is cheaper with a 0.35% expense ratio, compared with 0.65% for ATCL.

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

BUCK has the higher dividend yield at 7.20%, compared with 5.72% for ATCL.

What is the main difference between ATCL and BUCK?

ATCL is categorized as Derivative Income, while BUCK is Government Bonds. They also come from different issuers: REX Shares and Simplify. Their fees differ too: 0.65% for ATCL and 0.35% for BUCK.