ULTY vs. WEEK

Last updated Jul 21, 2026

ULTY (YieldMax Ultra Option Income Strategy ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - ULTY is a Derivative Income fund actively managed by YieldMax, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. Both are actively managed. Over the past year, ULTY returned -10.84% vs 3.75% for WEEK. At a correlation of -0.04, they often move in opposite directions. ULTY charges 1.14%/yr vs 0.19%/yr for WEEK.

Performance

ULTY vs. WEEK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in YieldMax Ultra Option Income Strategy ETF (ULTY) 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, ULTY achieves a 4.58% return, which is significantly higher than WEEK's 1.89% return.

ULTY

• 1D: 0.48%
• 1M: -6.07%
• 6M: 1.30%
• YTD: 4.58%
• 1Y: -10.84%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: -0.50%

WEEK

• 1D: 0.05%
• 1M: 0.25%
• 6M: 1.81%
• YTD: 1.89%
• 1Y: 3.75%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.86%

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

ULTY vs. WEEK - Yearly Performance Comparison

	2026 (YTD)	2025
ULTY YieldMax Ultra Option Income Strategy ETF	4.58%	3.75%
WEEK Roundhill Weekly T-Bill ETF	1.89%	3.37%

Correlation

The correlation between ULTY and WEEK is -0.00, 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	-0.00
Correlation (All Time) Calculated using the full available price history since Mar 6, 2025	-0.04

Return for Risk

ULTY vs. WEEK — Risk / Return Rank

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

ULTY

ULTY Risk / Return Rank: 6
ULTY Sharpe Ratio Rank: 6
ULTY Sortino Ratio Rank: 6
ULTY Omega Ratio Rank: 5
ULTY Calmar Ratio Rank: 6
ULTY Martin Ratio Rank: 6

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.

ULTY vs. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for YieldMax Ultra Option Income Strategy ETF (ULTY) 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.

	ULTY	WEEK	Difference
Sharpe ratio: Return per unit of total volatility	-0.50	8.90	-9.40
Sortino ratio: Return per unit of downside risk	-0.55	18.45	-19.00
Omega ratio: Gain probability vs. loss probability	0.93	4.41	-3.47
Calmar ratio: Return relative to maximum drawdown	-0.45	29.00	-29.45
Martin ratio: Return relative to average drawdown	-0.84	250.19	-251.03

ULTY vs. WEEK - Sharpe Ratio Comparison

The current ULTY Sharpe Ratio is -0.50, which is lower than the WEEK Sharpe Ratio of 8.90. The chart below compares the historical Sharpe Ratios of ULTY 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

ULTY vs. WEEK - Drawdown Comparison

The maximum ULTY drawdown since its inception was -26.85%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for ULTY and WEEK.

Drawdown Indicators

	ULTY	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-26.85%	-0.13%	-26.72%
Max Drawdown (1Y) Largest decline over 1 year	-24.16%	-0.13%	-24.03%
Current Drawdown Current decline from peak	-14.25%	0.00%	-14.25%
Average Drawdown Average peak-to-trough decline	-9.95%	-0.01%	-9.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.95%	0.02%	+12.93%

Volatility

ULTY vs. WEEK - Volatility Comparison

YieldMax Ultra Option Income Strategy ETF (ULTY) has a higher volatility of 6.15% compared to Roundhill Weekly T-Bill ETF (WEEK) at 0.12%. This indicates that ULTY'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

	ULTY	WEEK	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.15%	0.12%	+6.03%
Volatility (6M) Calculated over the trailing 6-month period	16.65%	0.26%	+16.39%
Volatility (1Y) Calculated over the trailing 1-year period	21.80%	0.42%	+21.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.12%	0.39%	+26.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.12%	0.39%	+26.73%

ULTY vs. WEEK - Expense Ratio Comparison

ULTY has a 1.14% expense ratio, which is higher than WEEK's 0.19% expense ratio.

Dividends

ULTY vs. WEEK - Dividend Comparison

ULTY's dividend yield for the trailing twelve months is around 114.49%, more than WEEK's 3.65% yield.

Position	TTM	2025	2024
ULTY YieldMax Ultra Option Income Strategy ETF	114.49%	142.99%	111.70%
WEEK Roundhill Weekly T-Bill ETF	3.65%	3.27%	0.00%

Frequently Asked Questions

Can I hold both ULTY and WEEK in my portfolio?

ULTY and WEEK have a correlation of -0.00, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ULTY or WEEK?

ULTY has higher volatility (6.15%) compared to WEEK (0.12%). In terms of maximum drawdown, ULTY dropped -26.85% vs WEEK's -0.13%.

Which ETF is better, ULTY or WEEK?

On 1-year performance, WEEK leads with 3.75% vs -10.84% for ULTY. On fees, WEEK is cheaper at 0.19% per year. On volatility, WEEK has been the lower-risk option at 0.12%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, ULTY or WEEK?

Over the 1-year period, WEEK has performed better with a 3.75% return vs -10.84%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, ULTY or WEEK?

WEEK is cheaper with a 0.19% expense ratio, compared with 1.14% for ULTY.

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

ULTY has the higher dividend yield at 114.49%, compared with 3.65% for WEEK.

What is the main difference between ULTY and WEEK?

ULTY is categorized as Derivative Income, while WEEK is Ultrashort Bond. They also come from different issuers: YieldMax and Roundhill. Their fees differ too: 1.14% for ULTY and 0.19% for WEEK.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (8.90 vs -0.50), 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.