STEM vs. RYLD

Last updated Jun 4, 2026

STEM (Stem, Inc.) is a stock, while RYLD (Global X Russell 2000 Covered Call ETF) is Hedge Fund fund tracking the CBOE Russell 2000 BuyWrite Index. Over the past 5 years, STEM returned -57.40%/yr vs 2.69%/yr for RYLD. At a 0.49 correlation, their price movements are largely independent.

Performance

STEM vs. RYLD - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Stem, Inc. (STEM) and Global X Russell 2000 Covered Call ETF (RYLD). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, STEM achieves a -39.93% return, which is significantly lower than RYLD's 8.33% return.

STEM

• 1D: -9.78%
• 1M: -10.76%
• YTD: -39.93%
• 6M: -47.56%
• 1Y: -10.39%
• 3Y*: -56.34%
• 5Y*: -57.40%
• 10Y*: —

RYLD

• 1D: -0.19%
• 1M: 2.78%
• YTD: 8.33%
• 6M: 9.14%
• 1Y: 21.47%
• 3Y*: 7.45%
• 5Y*: 2.69%
• 10Y*: —

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

STEM vs. RYLD - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
STEM Stem, Inc.	-39.93%	24.79%	-84.46%	-56.60%	-52.87%	-7.28%	110.93%
RYLD Global X Russell 2000 Covered Call ETF	8.33%	5.65%	10.13%	0.27%	-13.03%	22.13%	8.55%

Correlation

The correlation between STEM and RYLD is 0.47, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.47
Correlation (3Y) Calculated over the trailing 3-year period	0.45
Correlation (5Y) Calculated over the trailing 5-year period	0.50
Correlation (All Time) Calculated using the full available price history since Oct 9, 2020	0.49

Return for Risk

STEM vs. RYLD — Risk / Return Rank

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

STEM

STEM Risk / Return Rank: 41
STEM Sharpe Ratio Rank: 37
STEM Sortino Ratio Rank: 49
STEM Omega Ratio Rank: 47
STEM Calmar Ratio Rank: 36
STEM Martin Ratio Rank: 36

RYLD

RYLD Risk / Return Rank: 66
RYLD Sharpe Ratio Rank: 59
RYLD Sortino Ratio Rank: 59
RYLD Omega Ratio Rank: 69
RYLD Calmar Ratio Rank: 68
RYLD Martin Ratio Rank: 73

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.

STEM vs. RYLD - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Stem, Inc. (STEM) and Global X Russell 2000 Covered Call ETF (RYLD). 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.

	STEM	RYLD	Difference
Sharpe ratio: Return per unit of total volatility	-0.09	2.03	-2.11
Sortino ratio: Return per unit of downside risk	0.79	2.86	-2.06
Omega ratio: Gain probability vs. loss probability	1.09	1.42	-0.33
Calmar ratio: Return relative to maximum drawdown	-0.14	3.43	-3.57
Martin ratio: Return relative to average drawdown	-0.23	13.86	-14.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

STEM vs. RYLD - Sharpe Ratio Comparison

The current STEM Sharpe Ratio is -0.09, which is lower than the RYLD Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of STEM and RYLD, 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

	STEM	RYLD	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.09	2.03	-2.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.50	0.19	-0.70
Sharpe Ratio (All Time) Calculated using the full available price history	-0.36	0.32	-0.67

Drawdowns

STEM vs. RYLD - Drawdown Comparison

The maximum STEM drawdown since its inception was -99.41%, which is greater than RYLD's maximum drawdown of -41.53%. Use the drawdown chart below to compare losses from any high point for STEM and RYLD.

Drawdown Indicators

	STEM	RYLD	Difference
Max Drawdown Largest peak-to-trough decline	-99.41%	-41.53%	-57.88%
Max Drawdown (1Y) Largest decline over 1 year	-72.31%	-6.29%	-66.02%
Max Drawdown (3Y) Largest decline over 3 years	-95.98%	-19.05%	-76.93%
Max Drawdown (5Y) Largest decline over 5 years	-99.20%	-21.33%	-77.87%
Current Drawdown Current decline from peak	-99.10%	-0.19%	-98.91%
Average Drawdown Average peak-to-trough decline	-79.12%	-8.84%	-70.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	45.79%	1.55%	+44.24%

Volatility

STEM vs. RYLD - Volatility Comparison

Stem, Inc. (STEM) has a higher volatility of 30.04% compared to Global X Russell 2000 Covered Call ETF (RYLD) at 2.02%. This indicates that STEM's price experiences larger fluctuations and is considered to be riskier than RYLD based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STEM	RYLD	Difference
Volatility (1M) Calculated over the trailing 1-month period	30.04%	2.02%	+28.02%
Volatility (6M) Calculated over the trailing 6-month period	63.04%	7.60%	+55.44%
Volatility (1Y) Calculated over the trailing 1-year period	121.65%	10.67%	+110.98%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	114.11%	14.03%	+100.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	117.40%	17.20%	+100.20%

Dividends

STEM vs. RYLD - Dividend Comparison

STEM has not paid dividends to shareholders, while RYLD's dividend yield for the trailing twelve months is around 11.65%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
RYLD Global X Russell 2000 Covered Call ETF	11.65%	12.00%	12.03%	12.64%	13.49%	12.35%	10.76%	6.43%
STEM Stem, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both STEM and RYLD in my portfolio?

STEM and RYLD have a correlation of 0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, STEM or RYLD?

STEM has higher volatility (30.04%) compared to RYLD (2.02%). In terms of maximum drawdown, STEM dropped -99.41% vs RYLD's -41.53%.

Which has better risk-adjusted returns?

RYLD currently has the higher Sharpe Ratio (2.03 vs -0.09), 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.