MRNY vs. COSW

Last updated Apr 2, 2026

Compare and contrast key facts about YieldMax MRNA Option Income Strategy ETF (MRNY) and Roundhill COST WeeklyPay ETF (COSW).

MRNY and COSW are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. MRNY is an actively managed fund by YieldMax. It was launched on Oct 23, 2023. COSW is an actively managed fund by Roundhill. It was launched on Oct 23, 2025.

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.

MRNY vs. COSW - Yearly Performance Comparison

	2026 (YTD)	2025
MRNY YieldMax MRNA Option Income Strategy ETF	55.26%	4.11%
COSW Roundhill COST WeeklyPay ETF	17.85%	-10.71%

Returns By Period

In the year-to-date period, MRNY achieves a 55.26% return, which is significantly higher than COSW's 17.85% return.

MRNY

• 1D: -1.18%
• 1M: -1.56%
• YTD: 55.26%
• 6M: 60.43%
• 1Y: 57.50%
• 3Y*: —
• 5Y*: —
• 10Y*: —

COSW

• 1D: 0.56%
• 1M: -1.19%
• YTD: 17.85%
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MRNY vs. COSW - Expense Ratio Comparison

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

MRNY

YieldMax MRNA Option Income Strategy ETF

COSW

Roundhill COST WeeklyPay ETF

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: 56
MRNY Sharpe Ratio Rank: 61
MRNY Sortino Ratio Rank: 68
MRNY Omega Ratio Rank: 56
MRNY Calmar Ratio Rank: 60
MRNY Martin Ratio Rank: 34

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	1.11	—	—
Sortino ratio Return per unit of downside risk	1.78	—	—
Omega ratio Gain probability vs. loss probability	1.22	—	—
Calmar ratio Return relative to maximum drawdown	1.61	—	—
Martin ratio Return relative to average drawdown	3.21	—	—
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	1.11	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.50	0.50	-1.00

Correlation

The correlation between MRNY and COSW is -0.05. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.

Dividends

MRNY vs. COSW - Dividend Comparison

MRNY's dividend yield for the trailing twelve months is around 88.60%, more than COSW's 12.19% yield.

	TTM	2025	2024	2023
MRNY YieldMax MRNA Option Income Strategy ETF	88.60%	145.98%	178.49%	1.75%
COSW Roundhill COST WeeklyPay ETF	12.19%	4.96%	0.00%	0.00%

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 -12.17%. 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%	-12.17%	-69.98%
Max Drawdown (1Y) Largest decline over 1 year	-31.53%	—	—
Current Drawdown Current decline from peak	-67.31%	-2.74%	-64.57%
Average Drawdown Average peak-to-trough decline	-51.53%	-4.04%	-47.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	15.78%	—	—

Volatility

Volatility by Period

	MRNY	COSW	Difference
Volatility (1M) Calculated over the trailing 1-month period	16.90%	—	—
Volatility (6M) Calculated over the trailing 6-month period	39.43%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	52.05%	25.26%	+26.79%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.40%	25.26%	+26.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	51.40%	25.26%	+26.14%