UFO vs. WEEK

Last updated Jun 24, 2026

UFO (Procure Space ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - UFO is a Global Equities fund tracking the S-Network Space Index, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. UFO is passively managed, while WEEK is actively managed. Over the past year, UFO returned 76.34% vs 3.72% for WEEK. At a correlation of -0.07, they often move in opposite directions. UFO charges 0.75%/yr vs 0.19%/yr for WEEK.

Performance

UFO vs. WEEK - Performance Comparison

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

Returns By Period

In the year-to-date period, UFO achieves a 24.53% return, which is significantly higher than WEEK's 1.56% return.

UFO

• 1D: -1.21%
• 1M: -22.25%
• YTD: 24.53%
• 6M: 20.15%
• 1Y: 76.34%
• 3Y*: 39.04%
• 5Y*: 11.11%
• 10Y*: —

WEEK

• 1D: -0.09%
• 1M: 0.24%
• YTD: 1.56%
• 6M: 1.70%
• 1Y: 3.72%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

UFO vs. WEEK - Yearly Performance Comparison

	2026 (YTD)	2025
UFO Procure Space ETF	24.53%	60.92%
WEEK Roundhill Weekly T-Bill ETF	1.56%	3.37%

Correlation

The correlation between UFO and WEEK is -0.08, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.08
Correlation (All Time) Calculated using the full available price history since Mar 6, 2025	-0.07

Return for Risk

UFO vs. WEEK — Risk / Return Rank

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

UFO

UFO Risk / Return Rank: 54
UFO Sharpe Ratio Rank: 59
UFO Sortino Ratio Rank: 53
UFO Omega Ratio Rank: 48
UFO Calmar Ratio Rank: 56
UFO Martin Ratio Rank: 54

WEEK

WEEK Risk / Return Rank: 99
WEEK Sharpe Ratio Rank: 99
WEEK Sortino Ratio Rank: 99
WEEK Omega Ratio Rank: 99
WEEK Calmar Ratio Rank: 99
WEEK Martin Ratio Rank: 99

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. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Procure Space ETF (UFO) and Roundhill Weekly T-Bill ETF (WEEK). 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	WEEK	Difference
Sharpe ratio: Return per unit of total volatility	1.89	8.53	-6.64
Sortino ratio: Return per unit of downside risk	2.47	16.60	-14.13
Omega ratio: Gain probability vs. loss probability	1.29	4.07	-2.78
Calmar ratio: Return relative to maximum drawdown	2.64	28.78	-26.13
Martin ratio: Return relative to average drawdown	9.06	233.16	-224.11

UFO vs. WEEK - Sharpe Ratio Comparison

The current UFO Sharpe Ratio is 1.89, which is lower than the WEEK Sharpe Ratio of 8.53. The chart below compares the historical Sharpe Ratios of UFO and WEEK, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

UFO vs. WEEK - Drawdown Comparison

The maximum UFO drawdown since its inception was -50.33%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for UFO and WEEK.

Drawdown Indicators

	UFO	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-50.33%	-0.13%	-50.20%
Max Drawdown (1Y) Largest decline over 1 year	-29.02%	-0.13%	-28.89%
Max Drawdown (3Y) Largest decline over 3 years	-29.02%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-50.33%	—	—
Current Drawdown Current decline from peak	-29.02%	-0.09%	-28.93%
Average Drawdown Average peak-to-trough decline	-21.81%	-0.01%	-21.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.46%	0.02%	+8.44%

Volatility

UFO vs. WEEK - Volatility Comparison

Procure Space ETF (UFO) has a higher volatility of 19.63% compared to Roundhill Weekly T-Bill ETF (WEEK) at 0.16%. This indicates that UFO's price experiences larger fluctuations and is considered to be riskier than WEEK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	UFO	WEEK	Difference
Volatility (1M) Calculated over the trailing 1-month period	19.63%	0.16%	+19.47%
Volatility (6M) Calculated over the trailing 6-month period	33.65%	0.29%	+33.36%
Volatility (1Y) Calculated over the trailing 1-year period	40.71%	0.44%	+40.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.64%	0.40%	+30.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	31.16%	0.40%	+30.76%

UFO vs. WEEK - Expense Ratio Comparison

UFO has a 0.75% expense ratio, which is higher than WEEK's 0.19% expense ratio.

Dividends

UFO vs. WEEK - Dividend Comparison

UFO's dividend yield for the trailing twelve months is around 0.34%, less than WEEK's 3.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
UFO Procure Space ETF	0.34%	0.46%	1.98%	1.90%	3.19%	1.00%	1.07%	0.45%
WEEK Roundhill Weekly T-Bill ETF	3.70%	3.27%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both UFO and WEEK in my portfolio?

UFO and WEEK have a correlation of -0.08, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, UFO or WEEK?

UFO has higher volatility (19.63%) compared to WEEK (0.16%). In terms of maximum drawdown, UFO dropped -50.33% vs WEEK's -0.13%.

Which ETF is better, UFO or WEEK?

On 1-year performance, UFO leads with 76.34% vs 3.72% for WEEK. On fees, WEEK is cheaper at 0.19% per year. On volatility, WEEK has been the lower-risk option at 0.16%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, UFO or WEEK?

Over the 1-year period, UFO has performed better with a 76.34% return vs 3.72%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, UFO or WEEK?

WEEK is cheaper with a 0.19% expense ratio, compared with 0.75% for UFO.

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

WEEK has the higher dividend yield at 3.70%, compared with 0.34% for UFO.

What is the main difference between UFO and WEEK?

UFO is categorized as Global Equities, while WEEK is Ultrashort Bond. They also come from different issuers: ProcureAM and Roundhill. Their fees differ too: 0.75% for UFO and 0.19% for WEEK.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (8.53 vs 1.89), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.