MARS vs. UFO
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. Their 0.97 correlation means they have historically moved very closely together. Both charge a 0.75% expense ratio.
Performance
MARS vs. UFO - Performance Comparison
Loading charts...
Returns By Period
MARS
- 1D
- 4.78%
- 1M
- -21.72%
- 6M
- —
- YTD
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
- ALL TIME*
- —
UFO
- 1D
- 3.79%
- 1M
- -10.30%
- 6M
- 2.22%
- YTD
- 17.74%
- 1Y
- 54.84%
- 3Y*
- 34.13%
- 5Y*
- 10.61%
- 10Y*
- —
- ALL TIME*
- 10.03%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $836.37K | $1.07M | $6.11M | |
| $26.10M | $26.53M | $70.91M |
MARS vs. UFO - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
MARS Roundhill Space & Technology ETF | -3.65% |
UFO Procure Space ETF | -2.01% |
Correlation
The correlation between MARS and UFO is 0.97 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Mar 5, 2026 | 0.97 |
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
MARS vs. UFO — Risk / Return Rank
MARS
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
UFO
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.
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.
| MARS | UFO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.22 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.50 | — |
| Martin ratioReturn relative to average drawdown | — | 4.02 | — |
Loading charts...
Drawdowns
MARS vs. UFO - Drawdown Comparison
The maximum MARS drawdown since its inception was -50.89%, roughly equal to the maximum UFO drawdown of -50.33%. Use the drawdown chart below to compare losses from any high point for MARS and UFO.
Loading charts...
Drawdown Indicators
| MARS | UFO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -50.89% | -50.33% | -0.56% |
Max Drawdown (1Y)Largest decline over 1 year | — | -36.71% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -36.71% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -49.95% | — |
Current DrawdownCurrent decline from peak | -46.15% | -32.89% | -13.26% |
Average DrawdownAverage peak-to-trough decline | -16.50% | -21.97% | +5.47% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 13.68% | — |
Volatility
MARS vs. UFO - Volatility Comparison
Loading charts...
Volatility by Period
| MARS | UFO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 8.94% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 32.80% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 65.69% | 41.96% | +23.73% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 65.69% | 30.95% | +34.74% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 65.69% | 31.26% | +34.43% |
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 0.33%.
| 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 | 0.33% | 0.46% | 1.98% | 1.90% | 3.19% | 1.00% | 1.07% | 0.45% |
Frequently Asked Questions
With a correlation of 0.97, 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.
Both ETFs have the same 0.75% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.
MARS and UFO have the same expense ratio: 0.75% per year.
UFO has the higher dividend yield at 0.33%, compared with 0.00% for MARS.
MARS is categorized as Technology Equities, while UFO is Global Equities. They also come from different issuers: Roundhill and Procure.
Find the right allocation for MARS and UFO
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer