MNTK vs. XYLD

Last updated Jun 3, 2026

MNTK (Montauk Renewables, Inc.) is a stock, while XYLD (Global X S&P 500 Covered Call ETF) is Derivative Income fund tracking the Cboe S&P 500 BuyWrite Index. Over the past 5 years, MNTK returned -29.90%/yr vs 7.82%/yr for XYLD. At a 0.28 correlation, their price movements are largely independent.

Performance

MNTK vs. XYLD - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Montauk Renewables, Inc. (MNTK) and Global X S&P 500 Covered Call ETF (XYLD). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MNTK achieves a 2.40% return, which is significantly lower than XYLD's 5.11% return.

MNTK

• 1D: -4.47%
• 1M: 22.14%
• YTD: 2.40%
• 6M: 4.91%
• 1Y: -1.72%
• 3Y*: -38.19%
• 5Y*: -29.90%
• 10Y*: —

XYLD

• 1D: 0.10%
• 1M: 2.13%
• YTD: 5.11%
• 6M: 6.72%
• 1Y: 18.23%
• 3Y*: 11.32%
• 5Y*: 7.82%
• 10Y*: 8.27%

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

MNTK vs. XYLD - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
MNTK Montauk Renewables, Inc.	2.40%	-58.04%	-55.33%	-19.22%	7.61%	-12.62%
XYLD Global X S&P 500 Covered Call ETF	5.11%	8.02%	19.49%	11.10%	-12.05%	17.06%

Correlation

The correlation between MNTK and XYLD is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.21
Correlation (3Y) Calculated over the trailing 3-year period	0.20
Correlation (5Y) Calculated over the trailing 5-year period	0.26
Correlation (All Time) Calculated using the full available price history since Jan 25, 2021	0.28

Return for Risk

MNTK vs. XYLD — Risk / Return Rank

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

MNTK

MNTK Risk / Return Rank: 39
MNTK Sharpe Ratio Rank: 39
MNTK Sortino Ratio Rank: 43
MNTK Omega Ratio Rank: 41
MNTK Calmar Ratio Rank: 36
MNTK Martin Ratio Rank: 36

XYLD

XYLD Risk / Return Rank: 84
XYLD Sharpe Ratio Rank: 84
XYLD Sortino Ratio Rank: 88
XYLD Omega Ratio Rank: 94
XYLD Calmar Ratio Rank: 70
XYLD Martin Ratio Rank: 87

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.

MNTK vs. XYLD - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Montauk Renewables, Inc. (MNTK) and Global X S&P 500 Covered Call ETF (XYLD). 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.

	MNTK	XYLD	Difference
Sharpe ratio Return per unit of total volatility	-0.02	2.80	-2.82
Sortino ratio Return per unit of downside risk	0.56	3.98	-3.42
Omega ratio Gain probability vs. loss probability	1.06	1.67	-0.60
Calmar ratio Return relative to maximum drawdown	-0.12	3.52	-3.64
Martin ratio Return relative to average drawdown	-0.20	18.78	-18.98
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MNTK vs. XYLD - Sharpe Ratio Comparison

The current MNTK Sharpe Ratio is -0.02, which is lower than the XYLD Sharpe Ratio of 2.80. The chart below compares the historical Sharpe Ratios of MNTK and XYLD, 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

	MNTK	XYLD	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.02	2.80	-2.82
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.41	0.70	-1.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.58	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.41	0.60	-1.02

Drawdowns

MNTK vs. XYLD - Drawdown Comparison

The maximum MNTK drawdown since its inception was -94.49%, which is greater than XYLD's maximum drawdown of -33.46%. Use the drawdown chart below to compare losses from any high point for MNTK and XYLD.

Drawdown Indicators

	MNTK	XYLD	Difference
Max Drawdown Largest peak-to-trough decline	-94.49%	-33.46%	-61.03%
Max Drawdown (1Y) Largest decline over 1 year	-58.67%	-5.29%	-53.38%
Max Drawdown (3Y) Largest decline over 3 years	-89.61%	-15.53%	-74.08%
Max Drawdown (5Y) Largest decline over 5 years	-94.49%	-18.66%	-75.83%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.46%	—
Current Drawdown Current decline from peak	-91.58%	0.00%	-91.58%
Average Drawdown Average peak-to-trough decline	-57.24%	-3.72%	-53.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	35.17%	0.99%	+34.18%

Volatility

MNTK vs. XYLD - Volatility Comparison

Montauk Renewables, Inc. (MNTK) has a higher volatility of 25.09% compared to Global X S&P 500 Covered Call ETF (XYLD) at 0.85%. This indicates that MNTK's price experiences larger fluctuations and is considered to be riskier than XYLD based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MNTK	XYLD	Difference
Volatility (1M) Calculated over the trailing 1-month period	25.09%	0.85%	+24.24%
Volatility (6M) Calculated over the trailing 6-month period	49.73%	5.37%	+44.36%
Volatility (1Y) Calculated over the trailing 1-year period	78.90%	6.55%	+72.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	72.80%	11.22%	+61.58%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	73.37%	14.21%	+59.16%

Dividends

MNTK vs. XYLD - Dividend Comparison

MNTK has not paid dividends to shareholders, while XYLD's dividend yield for the trailing twelve months is around 10.50%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MNTK Montauk Renewables, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
XYLD Global X S&P 500 Covered Call ETF	10.50%	10.51%	11.54%	10.51%	13.43%	9.07%	7.93%	5.76%	7.12%	5.18%	3.23%	4.65%

Frequently Asked Questions

Can I hold both MNTK and XYLD in my portfolio?

MNTK and XYLD have a correlation of 0.21, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MNTK or XYLD?

MNTK has higher volatility (25.09%) compared to XYLD (0.85%). In terms of maximum drawdown, MNTK dropped -94.49% vs XYLD's -33.46%.

Which has better risk-adjusted returns?

XYLD currently has the higher Sharpe Ratio (2.80 vs -0.02), 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.