MARS vs. UFO

Last updated Jun 4, 2026

MARS (Roundhill Space & Technology ETF) and UFO (Procure Space ETF) are both exchange-traded funds - MARS is a Technology Equities fund actively managed by Roundhill, while UFO is a Global Equities fund tracking the S-Network Space Index. MARS is actively managed, while UFO is passively managed. With a 0.98 correlation, they move nearly in lockstep. Both charge a 0.75% expense ratio.

Performance

MARS vs. UFO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill Space & Technology ETF (MARS) and Procure Space ETF (UFO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MARS

• 1D: -6.85%
• 1M: 20.13%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

UFO

• 1D: -5.68%
• 1M: 12.53%
• YTD: 49.39%
• 6M: 71.06%
• 1Y: 135.88%
• 3Y*: 46.01%
• 5Y*: 15.60%
• 10Y*: —

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

MARS vs. UFO - Yearly Performance Comparison

	2026 (YTD)
MARS Roundhill Space & Technology ETF	48.10%
UFO Procure Space ETF	28.60%

Correlation

The correlation between MARS and UFO is 0.98 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (All Time) Calculated using the full available price history since Mar 6, 2026	0.98

Return for Risk

MARS vs. UFO — Risk / Return Rank

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

UFO

UFO Risk / Return Rank: 88
UFO Sharpe Ratio Rank: 93
UFO Sortino Ratio Rank: 86
UFO Omega Ratio Rank: 78
UFO Calmar Ratio Rank: 92
UFO Martin Ratio Rank: 89

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.

MARS vs. UFO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Space & Technology ETF (MARS) and Procure Space ETF (UFO). 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

	MARS	UFO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	3.59	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.52	—
Sharpe Ratio (All Time) Calculated using the full available price history	6.31	0.46	+5.85

Drawdowns

MARS vs. UFO - Drawdown Comparison

The maximum MARS drawdown since its inception was -19.50%, smaller than the maximum UFO drawdown of -50.33%. Use the drawdown chart below to compare losses from any high point for MARS and UFO.

Drawdown Indicators

	MARS	UFO	Difference
Max Drawdown Largest peak-to-trough decline	-19.50%	-50.33%	+30.83%
Max Drawdown (1Y) Largest decline over 1 year	—	-21.95%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-25.91%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-50.33%	—
Current Drawdown Current decline from peak	-19.50%	-14.84%	-4.66%
Average Drawdown Average peak-to-trough decline	-3.31%	-21.82%	+18.51%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	6.72%	—

Volatility

Volatility by Period

	MARS	UFO	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	16.64%	—
Volatility (6M) Calculated over the trailing 6-month period	—	31.27%	—
Volatility (1Y) Calculated over the trailing 1-year period	62.89%	38.08%	+24.81%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	62.89%	29.92%	+32.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	62.89%	30.76%	+32.13%

MARS vs. UFO - Expense Ratio Comparison

Both MARS and UFO have an expense ratio of 0.75%.

Dividends

MARS vs. UFO - Dividend Comparison

MARS has not paid dividends to shareholders, while UFO's dividend yield for the trailing twelve months is around 0.29%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
MARS Roundhill Space & Technology ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
UFO Procure Space ETF	0.29%	0.46%	1.98%	1.90%	3.19%	1.00%	1.07%	0.45%

Frequently Asked Questions

Can I hold both MARS and UFO in my portfolio?

With a correlation of 0.98, MARS and UFO move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which ETF is better, MARS or UFO?

Both ETFs have the same 0.75% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MARS or UFO?

MARS and UFO have the same expense ratio: 0.75% per year.

Which ETF pays a higher dividend yield, MARS or UFO?

UFO has the higher dividend yield at 0.29%, compared with 0.00% for MARS.

What is the main difference between MARS and UFO?

MARS is categorized as Technology Equities, while UFO is Global Equities. They also come from different issuers: Roundhill and ProcureAM.