XYLU.L vs. BUCK

Last updated Jun 5, 2026

XYLU.L (Global X S&P 500 Covered Call UCITS ETF USD) and BUCK (Simplify Treasury Option Income ETF) are both exchange-traded funds - XYLU.L is a Derivative Income fund tracking the Cboe S&P 500 BuyWrite 15% WHT Index, while BUCK is a Government Bonds fund actively managed by Simplify. XYLU.L is passively managed, while BUCK is actively managed. Over the past year, XYLU.L returned 18.07% vs 7.46% for BUCK. At a 0.08 correlation, their price movements are largely independent. XYLU.L charges 0.45%/yr vs 0.35%/yr for BUCK.

Performance

XYLU.L vs. BUCK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Global X S&P 500 Covered Call UCITS ETF USD (XYLU.L) 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, XYLU.L achieves a 5.28% return, which is significantly higher than BUCK's 1.99% return.

XYLU.L

• 1D: 0.03%
• 1M: 2.15%
• YTD: 5.28%
• 6M: 6.77%
• 1Y: 18.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BUCK

• 1D: 0.09%
• 1M: 0.43%
• YTD: 1.99%
• 6M: 1.92%
• 1Y: 7.46%
• 3Y*: 5.27%
• 5Y*: —
• 10Y*: —

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

XYLU.L vs. BUCK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
XYLU.L Global X S&P 500 Covered Call UCITS ETF USD	5.28%	7.85%	19.71%	0.64%
BUCK Simplify Treasury Option Income ETF	1.99%	4.13%	7.25%	1.81%

Correlation

The correlation between XYLU.L and BUCK is 0.07, 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	0.07
Correlation (All Time) Calculated using the full available price history since Jul 17, 2023	0.08

Return for Risk

XYLU.L vs. BUCK — Risk / Return Rank

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

XYLU.L

XYLU.L Risk / Return Rank: 83
XYLU.L Sharpe Ratio Rank: 82
XYLU.L Sortino Ratio Rank: 88
XYLU.L Omega Ratio Rank: 89
XYLU.L Calmar Ratio Rank: 71
XYLU.L Martin Ratio Rank: 87

BUCK

BUCK Risk / Return Rank: 85
BUCK Sharpe Ratio Rank: 76
BUCK Sortino Ratio Rank: 81
BUCK Omega Ratio Rank: 85
BUCK Calmar Ratio Rank: 91
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.

XYLU.L vs. BUCK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Global X S&P 500 Covered Call UCITS ETF USD (XYLU.L) 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.

	XYLU.L	BUCK	Difference
Sharpe ratio: Return per unit of total volatility	2.61	2.42	+0.20
Sortino ratio: Return per unit of downside risk	3.93	3.60	+0.33
Omega ratio: Gain probability vs. loss probability	1.56	1.51	+0.04
Calmar ratio: Return relative to maximum drawdown	3.48	5.73	-2.25
Martin ratio: Return relative to average drawdown	18.28	30.33	-12.05
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

XYLU.L vs. BUCK - Sharpe Ratio Comparison

The current XYLU.L Sharpe Ratio is 2.61, which is comparable to the BUCK Sharpe Ratio of 2.42. The chart below compares the historical Sharpe Ratios of XYLU.L 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.

Sharpe Ratios by Period

	XYLU.L	BUCK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.61	2.42	+0.20
Sharpe Ratio (All Time) Calculated using the full available price history	1.11	1.48	-0.36

Drawdowns

XYLU.L vs. BUCK - Drawdown Comparison

The maximum XYLU.L drawdown since its inception was -17.20%, which is greater than BUCK's maximum drawdown of -5.43%. Use the drawdown chart below to compare losses from any high point for XYLU.L and BUCK.

Drawdown Indicators

	XYLU.L	BUCK	Difference
Max Drawdown Largest peak-to-trough decline	-17.20%	-5.43%	-11.77%
Max Drawdown (1Y) Largest decline over 1 year	-5.17%	-1.31%	-3.86%
Max Drawdown (3Y) Largest decline over 3 years	—	-5.43%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-2.02%	-0.49%	-1.53%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.99%	0.25%	+0.74%

Volatility

XYLU.L vs. BUCK - Volatility Comparison

Global X S&P 500 Covered Call UCITS ETF USD (XYLU.L) has a higher volatility of 1.52% compared to Simplify Treasury Option Income ETF (BUCK) at 0.70%. This indicates that XYLU.L's price experiences larger fluctuations and is considered to be riskier than BUCK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	XYLU.L	BUCK	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.52%	0.70%	+0.82%
Volatility (6M) Calculated over the trailing 6-month period	5.45%	1.52%	+3.93%
Volatility (1Y) Calculated over the trailing 1-year period	6.89%	3.14%	+3.75%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.44%	3.48%	+6.96%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.44%	3.48%	+6.96%

XYLU.L vs. BUCK - Expense Ratio Comparison

XYLU.L has a 0.45% expense ratio, which is higher than BUCK's 0.35% expense ratio.

Dividends

XYLU.L vs. BUCK - Dividend Comparison

XYLU.L's dividend yield for the trailing twelve months is around 10.27%, more than BUCK's 7.41% yield.

Position	TTM	2025	2024	2023	2022
BUCK Simplify Treasury Option Income ETF	7.41%	7.59%	8.84%	4.84%	0.59%
XYLU.L Global X S&P 500 Covered Call UCITS ETF USD	10.27%	10.48%	8.49%	3.88%	0.00%

Frequently Asked Questions

Can I hold both XYLU.L and BUCK in my portfolio?

XYLU.L and BUCK have a correlation of 0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, XYLU.L 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, XYLU.L or BUCK?

BUCK is cheaper with a 0.35% expense ratio, compared with 0.45% for XYLU.L.

What is the main difference between XYLU.L and BUCK?

XYLU.L is categorized as Derivative Income, while BUCK is Government Bonds. They also come from different issuers: Global X and Simplify. Their fees differ too: 0.45% for XYLU.L and 0.35% for BUCK.