SPAX vs. MRNY

Last updated Apr 1, 2026

Compare and contrast key facts about Robinson Alternative Yield Pre-merger SPAC ETF (SPAX) and YieldMax MRNA Option Income Strategy ETF (MRNY).

SPAX and MRNY are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. SPAX is an actively managed fund by Toroso Investments. It was launched on Jun 22, 2021. MRNY is an actively managed fund by YieldMax. It was launched on Oct 23, 2023.

Performance

SPAX vs. MRNY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Robinson Alternative Yield Pre-merger SPAC ETF (SPAX) and YieldMax MRNA Option Income Strategy ETF (MRNY). The values are adjusted to include any dividend payments, if applicable.

SPAX vs. MRNY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
SPAX Robinson Alternative Yield Pre-merger SPAC ETF	0.00%	0.02%	5.11%	0.78%
MRNY YieldMax MRNA Option Income Strategy ETF	57.12%	-35.72%	-59.32%	19.61%

Returns By Period

SPAX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

MRNY

• 1D: 5.03%
• 1M: -1.27%
• YTD: 57.12%
• 6M: 66.94%
• 1Y: 52.45%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SPAX vs. MRNY - Expense Ratio Comparison

SPAX has a 0.85% expense ratio, which is lower than MRNY's 0.99% expense ratio.

MRNY

YieldMax MRNA Option Income Strategy ETF

SPAX

Robinson Alternative Yield Pre-merger SPAC ETF

Return for Risk

SPAX vs. MRNY — Risk / Return Rank

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

MRNY

MRNY Risk / Return Rank: 54
MRNY Sharpe Ratio Rank: 59
MRNY Sortino Ratio Rank: 69
MRNY Omega Ratio Rank: 57
MRNY Calmar Ratio Rank: 53
MRNY Martin Ratio Rank: 30

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.

SPAX vs. MRNY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Robinson Alternative Yield Pre-merger SPAC ETF (SPAX) and YieldMax MRNA Option Income Strategy ETF (MRNY). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	SPAX	MRNY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.01	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	-0.50	—

Correlation

The correlation between SPAX and MRNY is -0.01. 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

SPAX vs. MRNY - Dividend Comparison

SPAX has not paid dividends to shareholders, while MRNY's dividend yield for the trailing twelve months is around 87.55%.

	TTM	2025	2024	2023	2022
SPAX Robinson Alternative Yield Pre-merger SPAC ETF	0.00%	0.00%	5.50%	7.54%	0.97%
MRNY YieldMax MRNA Option Income Strategy ETF	87.55%	145.98%	178.49%	1.75%	0.00%

Drawdowns

Drawdown Indicators

	SPAX	MRNY	Difference
Max Drawdown Largest peak-to-trough decline	—	-82.15%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-31.53%	—
Current Drawdown Current decline from peak	—	-66.92%	—
Average Drawdown Average peak-to-trough decline	—	-51.51%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	15.83%	—

Volatility

Volatility by Period

	SPAX	MRNY	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	17.53%	—
Volatility (6M) Calculated over the trailing 6-month period	—	39.40%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	52.68%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	51.44%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	51.44%	—