SRV vs. XYLD

Last updated Aug 1, 2026

SRV (NXG Cushing® Midstream Energy Fund) and XYLD (Global X S&P 500 Covered Call ETF) are both funds - SRV is a Energy Equities fund actively managed by NXG, while XYLD is a Derivative Income fund tracking the Cboe S&P 500 BuyWrite Index. SRV is actively managed, while XYLD is passively managed. Over the past 10 years, SRV returned 11.81%/yr vs 8.34%/yr for XYLD. Their 0.35 correlation means their historical movements had little consistent relationship. SRV charges 1.00%/yr vs 0.60%/yr for XYLD.

Performance

SRV vs. XYLD - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in NXG Cushing® Midstream Energy Fund (SRV) 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, SRV achieves a 29.04% return, which is significantly higher than XYLD's 8.05% return. Over the past 10 years, SRV has outperformed XYLD with an annualized return of 11.81%, while XYLD has yielded a comparatively lower 8.34% annualized return.

SRV

• 1D: 4.38%
• 1M: -3.23%
• 6M: 22.64%
• YTD: 29.04%
• 1Y: 32.00%
• 3Y*: 21.45%
• 5Y*: 27.28%
• 10Y*: 11.81%
• ALL TIME*: -0.55%

XYLD

• 1D: 0.49%
• 1M: 1.82%
• 6M: 6.81%
• YTD: 8.05%
• 1Y: 18.90%
• 3Y*: 11.51%
• 5Y*: 7.90%
• 10Y*: 8.34%
• ALL TIME*: 8.37%

*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)
SRV NXG Cushing® Midstream Energy Fund	$3.49M	$3.96M	$3.22M
XYLD Global X S&P 500 Covered Call ETF	$36.93M	$37.58M	$32.35M

SRV vs. XYLD - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SRV NXG Cushing® Midstream Energy Fund	29.04%	5.05%	50.70%	19.88%	20.11%	50.45%	-41.65%	33.99%	-21.61%	-4.21%
XYLD Global X S&P 500 Covered Call ETF	8.05%	8.02%	19.49%	11.10%	-12.05%	19.59%	-0.56%	21.41%	-6.09%	16.49%

Correlation

The correlation between SRV and XYLD is 0.07, meaning there was essentially no consistent relationship between their historical price movements. Each responded to its own set of market drivers.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.07
Correlation (3Y) Balances recent behavior with more history.	0.21
Correlation (5Y) Shows whether the relationship held over a longer period.	0.30
Correlation (10Y) Provides a long-term view across more market conditions.	0.34
Correlation (All Time) Calculated using the full available price history since Jun 24, 2013	0.35

Over the past year, the correlation between SRV and XYLD has dropped to 0.07 - well below their long-term average of 0.35, suggesting their price drivers have been diverging.

Return for Risk

SRV vs. XYLD — Risk / Return Rank

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

SRV

SRV Risk / Return Rank: 58
SRV Sharpe Ratio Rank: 59
SRV Sortino Ratio Rank: 53
SRV Omega Ratio Rank: 58
SRV Calmar Ratio Rank: 73
SRV Martin Ratio Rank: 46

XYLD

XYLD Risk / Return Rank: 93
XYLD Sharpe Ratio Rank: 93
XYLD Sortino Ratio Rank: 94
XYLD Omega Ratio Rank: 95
XYLD Calmar Ratio Rank: 87
XYLD Martin Ratio Rank: 94

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.

SRV vs. XYLD - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for NXG Cushing® Midstream Energy Fund (SRV) 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.

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.

	SRV	XYLD	Difference
Sharpe ratio: Return per unit of total volatility	1.42	2.53	-1.11
Sortino ratio: Return per unit of downside risk	1.93	3.60	-1.66
Omega ratio: Gain probability vs. loss probability	1.26	1.56	-0.31
Calmar ratio: Return relative to maximum drawdown	2.32	3.40	-1.08
Martin ratio: Return relative to average drawdown	6.32	17.69	-11.37

SRV vs. XYLD - Sharpe Ratio Comparison

The current SRV Sharpe Ratio is 1.42, which is lower than the XYLD Sharpe Ratio of 2.53. The chart below compares the historical Sharpe Ratios of SRV 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.

Drawdowns

SRV vs. XYLD - Drawdown Comparison

The maximum SRV drawdown since its inception was -92.97%, which is greater than XYLD's maximum drawdown of -33.46%. Use the drawdown chart below to compare losses from any high point for SRV and XYLD.

Drawdown Indicators

	SRV	XYLD	Difference
Max Drawdown Largest peak-to-trough decline	-92.97%	-33.46%	-59.51%
Max Drawdown (1Y) Largest decline over 1 year	-13.13%	-5.29%	-7.84%
Max Drawdown (3Y) Largest decline over 3 years	-26.26%	-15.53%	-10.73%
Max Drawdown (5Y) Largest decline over 5 years	-26.26%	-18.66%	-7.60%
Max Drawdown (10Y) Largest decline over 10 years	-81.70%	-33.46%	-48.24%
Current Drawdown Current decline from peak	-9.98%	0.00%	-9.98%
Average Drawdown Average peak-to-trough decline	-48.41%	-3.68%	-44.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.81%	1.02%	+3.79%

Volatility

SRV vs. XYLD - Volatility Comparison

NXG Cushing® Midstream Energy Fund (SRV) has a higher volatility of 9.35% compared to Global X S&P 500 Covered Call ETF (XYLD) at 1.92%. This indicates that SRV'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

	SRV	XYLD	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.35%	1.92%	+7.43%
Volatility (6M) Calculated over the trailing 6-month period	17.97%	5.97%	+12.00%
Volatility (1Y) Calculated over the trailing 1-year period	21.49%	7.13%	+14.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.44%	11.27%	+15.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	38.35%	14.15%	+24.20%

SRV vs. XYLD - Expense Ratio Comparison

SRV has a 1.00% expense ratio, which is higher than XYLD's 0.60% expense ratio.

Dividends

SRV vs. XYLD - Dividend Comparison

SRV's dividend yield for the trailing twelve months is around 16.27%, more than XYLD's 10.53% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SRV NXG Cushing® Midstream Energy Fund	16.27%	19.31%	12.85%	15.56%	8.85%	4.72%	12.05%	10.59%	12.73%	9.07%	7.95%	11.01%
XYLD Global X S&P 500 Covered Call ETF	10.53%	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 SRV and XYLD in my portfolio?

SRV and XYLD 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 is riskier, SRV or XYLD?

SRV has higher volatility (9.35%) compared to XYLD (1.92%). In terms of maximum drawdown, SRV dropped -92.97% vs XYLD's -33.46%.

Which has better risk-adjusted returns?

XYLD currently has the higher Sharpe Ratio (2.53 vs 1.42), 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.