MRNY vs. COSW

Last updated Jun 4, 2026

MRNY (YieldMax MRNA Option Income Strategy ETF) and COSW (Roundhill COST WeeklyPay ETF) are both Derivative Income funds. Both are actively managed. At a correlation of -0.06, they often move in opposite directions. Both charge a 0.99% expense ratio.

Performance

MRNY vs. COSW - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in YieldMax MRNA Option Income Strategy ETF (MRNY) and Roundhill COST WeeklyPay ETF (COSW). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MRNY achieves a 51.59% return, which is significantly higher than COSW's 12.13% return.

MRNY

• 1D: 5.73%
• 1M: 4.23%
• YTD: 51.59%
• 6M: 62.21%
• 1Y: 47.46%
• 3Y*: —
• 5Y*: —
• 10Y*: —

COSW

• 1D: 0.92%
• 1M: -6.40%
• YTD: 12.13%
• 6M: 2.92%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MRNY vs. COSW - Yearly Performance Comparison

	2026 (YTD)	2025
MRNY YieldMax MRNA Option Income Strategy ETF	51.59%	4.11%
COSW Roundhill COST WeeklyPay ETF	12.13%	-10.71%

Correlation

The correlation between MRNY and COSW is -0.06, 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 (All Time) Calculated using the full available price history since Oct 24, 2025	-0.06

Return for Risk

MRNY vs. COSW — Risk / Return Rank

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

MRNY

MRNY Risk / Return Rank: 28
MRNY Sharpe Ratio Rank: 27
MRNY Sortino Ratio Rank: 31
MRNY Omega Ratio Rank: 29
MRNY Calmar Ratio Rank: 30
MRNY Martin Ratio Rank: 23

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.

MRNY vs. COSW - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for YieldMax MRNA Option Income Strategy ETF (MRNY) and Roundhill COST WeeklyPay ETF (COSW). 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.

	MRNY	COSW	Difference
Sharpe ratio Return per unit of total volatility	0.97	—	—
Sortino ratio Return per unit of downside risk	1.69	—	—
Omega ratio Gain probability vs. loss probability	1.20	—	—
Calmar ratio Return relative to maximum drawdown	1.51	—	—
Martin ratio Return relative to average drawdown	2.95	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	MRNY	COSW	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.97	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.49	0.01	-0.50

Drawdowns

MRNY vs. COSW - Drawdown Comparison

The maximum MRNY drawdown since its inception was -82.15%, which is greater than COSW's maximum drawdown of -16.24%. Use the drawdown chart below to compare losses from any high point for MRNY and COSW.

Drawdown Indicators

	MRNY	COSW	Difference
Max Drawdown Largest peak-to-trough decline	-82.15%	-16.24%	-65.91%
Max Drawdown (1Y) Largest decline over 1 year	-31.53%	—	—
Current Drawdown Current decline from peak	-68.09%	-14.62%	-53.47%
Average Drawdown Average peak-to-trough decline	-52.62%	-4.17%	-48.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	16.15%	—	—

Volatility

Volatility by Period

	MRNY	COSW	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.36%	—	—
Volatility (6M) Calculated over the trailing 6-month period	37.05%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	49.37%	26.10%	+23.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	50.76%	26.10%	+24.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	50.76%	26.10%	+24.66%

MRNY vs. COSW - Expense Ratio Comparison

Both MRNY and COSW have an expense ratio of 0.99%.

Dividends

MRNY vs. COSW - Dividend Comparison

MRNY's dividend yield for the trailing twelve months is around 100.06%, more than COSW's 18.13% yield.

Position	TTM	2025	2024	2023
COSW Roundhill COST WeeklyPay ETF	18.13%	4.96%	0.00%	0.00%
MRNY YieldMax MRNA Option Income Strategy ETF	100.06%	145.98%	178.49%	1.75%

Frequently Asked Questions

Can I hold both MRNY and COSW in my portfolio?

MRNY and COSW have a correlation of -0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MRNY or COSW?

Both ETFs have the same 0.99% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MRNY or COSW?

MRNY and COSW have the same expense ratio: 0.99% per year.

Which ETF pays a higher dividend yield, MRNY or COSW?

MRNY has the higher dividend yield at 100.06%, compared with 18.13% for COSW.

What is the main difference between MRNY and COSW?

They also come from different issuers: YieldMax and Roundhill.