UFO vs. MARS

Last updated Jul 17, 2026

UFO (Procure Space ETF) and MARS (Roundhill Space & Technology ETF) are both exchange-traded funds - UFO is a Global Equities fund tracking the S-Network Space Index, while MARS is a Technology Equities fund actively managed by Roundhill. UFO is passively managed, while MARS is actively managed. With a 0.97 correlation, they move nearly in lockstep. Both charge a 0.75% expense ratio.

Performance

UFO vs. MARS - Performance Comparison

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

Returns By Period

UFO

• 1D: -3.72%
• 1M: -14.71%
• 6M: -4.90%
• YTD: 13.16%
• 1Y: 43.87%
• 3Y*: 32.66%
• 5Y*: 10.29%
• 10Y*: —

MARS

• 1D: -5.56%
• 1M: -26.71%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

UFO vs. MARS - Yearly Performance Comparison

	2026 (YTD)
UFO Procure Space ETF	-5.82%
MARS Roundhill Space & Technology ETF	-2.67%

Correlation

The correlation between UFO and MARS is 0.97 - 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 5, 2026	0.97

Return for Risk

UFO vs. MARS — Risk / Return Rank

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

UFO

UFO Risk / Return Rank: 34
UFO Sharpe Ratio Rank: 35
UFO Sortino Ratio Rank: 37
UFO Omega Ratio Rank: 33
UFO Calmar Ratio Rank: 30
UFO Martin Ratio Rank: 33

MARS

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

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.

UFO vs. MARS - Risk-Adjusted Trends Comparison

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

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	UFO	MARS	Difference
Sharpe ratio: Return per unit of total volatility	1.05	—	—
Sortino ratio: Return per unit of downside risk	1.65	—	—
Omega ratio: Gain probability vs. loss probability	1.19	—	—
Calmar ratio: Return relative to maximum drawdown	1.24	—	—
Martin ratio: Return relative to average drawdown	3.88	—	—

Drawdowns

UFO vs. MARS - Drawdown Comparison

The maximum UFO drawdown since its inception was -50.33%, which is greater than MARS's maximum drawdown of -45.60%. Use the drawdown chart below to compare losses from any high point for UFO and MARS.

Drawdown Indicators

	UFO	MARS	Difference
Max Drawdown Largest peak-to-trough decline	-50.33%	-45.60%	-4.73%
Max Drawdown (1Y) Largest decline over 1 year	-35.50%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-35.50%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-49.95%	—	—
Current Drawdown Current decline from peak	-35.50%	-45.60%	+10.10%
Average Drawdown Average peak-to-trough decline	-21.88%	-12.45%	-9.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	11.35%	—	—

Volatility

Volatility by Period

	UFO	MARS	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.09%	—	—
Volatility (6M) Calculated over the trailing 6-month period	33.46%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	41.87%	67.55%	-25.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.90%	67.55%	-36.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	31.28%	67.55%	-36.27%

UFO vs. MARS - Expense Ratio Comparison

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

Dividends

UFO vs. MARS - Dividend Comparison

UFO's dividend yield for the trailing twelve months is around 0.34%, while MARS has not paid dividends to shareholders.

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	0.34%	0.46%	1.98%	1.90%	3.19%	1.00%	1.07%	0.45%

Frequently Asked Questions

Can I hold both UFO and MARS in my portfolio?

With a correlation of 0.97, UFO and MARS 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, UFO or MARS?

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, UFO or MARS?

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

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

UFO has the higher dividend yield at 0.34%, compared with 0.00% for MARS.

What is the main difference between UFO and MARS?

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