MSII vs. WEEK

Last updated Jun 24, 2026

MSII (REX MSTR Growth & Income ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - MSII is a Leveraged Equities fund actively managed by REX, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. Both are actively managed. Over the past year, MSII returned -70.57% vs 3.72% for WEEK. At a correlation of -0.07, they often move in opposite directions. MSII charges 0.99%/yr vs 0.19%/yr for WEEK.

Performance

MSII vs. WEEK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX MSTR Growth & Income ETF (MSII) 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, MSII achieves a -28.10% return, which is significantly lower than WEEK's 1.56% return.

MSII

• 1D: 0.00%
• 1M: -30.37%
• YTD: -28.10%
• 6M: -30.19%
• 1Y: -70.57%
• 3Y*: —
• 5Y*: —
• 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)

MSII vs. WEEK - Yearly Performance Comparison

	2026 (YTD)	2025
MSII REX MSTR Growth & Income ETF	-28.10%	-61.03%
WEEK Roundhill Weekly T-Bill ETF	1.56%	2.34%

Correlation

The correlation between MSII 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 Jun 4, 2025	-0.07

Return for Risk

MSII vs. WEEK — Risk / Return Rank

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

MSII

MSII Risk / Return Rank: 1
MSII Sharpe Ratio Rank: 1
MSII Sortino Ratio Rank: 1
MSII Omega Ratio Rank: 1
MSII Calmar Ratio Rank: 1
MSII Martin Ratio Rank: 3

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.

MSII vs. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX MSTR Growth & Income ETF (MSII) 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.

	MSII	WEEK	Difference
Sharpe ratio: Return per unit of total volatility	-0.98	8.53	-9.51
Sortino ratio: Return per unit of downside risk	-1.76	16.60	-18.36
Omega ratio: Gain probability vs. loss probability	0.79	4.07	-3.28
Calmar ratio: Return relative to maximum drawdown	-0.90	28.78	-29.68
Martin ratio: Return relative to average drawdown	-1.28	233.16	-234.44

MSII vs. WEEK - Sharpe Ratio Comparison

The current MSII Sharpe Ratio is -0.98, which is lower than the WEEK Sharpe Ratio of 8.53. The chart below compares the historical Sharpe Ratios of MSII 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

MSII vs. WEEK - Drawdown Comparison

The maximum MSII drawdown since its inception was -78.73%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for MSII and WEEK.

Drawdown Indicators

	MSII	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-78.73%	-0.13%	-78.60%
Max Drawdown (1Y) Largest decline over 1 year	-78.73%	-0.13%	-78.60%
Current Drawdown Current decline from peak	-76.65%	-0.09%	-76.56%
Average Drawdown Average peak-to-trough decline	-47.49%	-0.01%	-47.48%
Ulcer Index Depth and duration of drawdowns from previous peaks	55.34%	0.02%	+55.32%

Volatility

MSII vs. WEEK - Volatility Comparison

REX MSTR Growth & Income ETF (MSII) has a higher volatility of 21.17% compared to Roundhill Weekly T-Bill ETF (WEEK) at 0.16%. This indicates that MSII'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

	MSII	WEEK	Difference
Volatility (1M) Calculated over the trailing 1-month period	21.17%	0.16%	+21.01%
Volatility (6M) Calculated over the trailing 6-month period	56.72%	0.29%	+56.43%
Volatility (1Y) Calculated over the trailing 1-year period	71.96%	0.44%	+71.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	70.62%	0.40%	+70.22%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	70.62%	0.40%	+70.22%

MSII vs. WEEK - Expense Ratio Comparison

MSII has a 0.99% expense ratio, which is higher than WEEK's 0.19% expense ratio.

Dividends

MSII vs. WEEK - Dividend Comparison

MSII's dividend yield for the trailing twelve months is around 97.58%, more than WEEK's 3.70% yield.

Position	TTM	2025
MSII REX MSTR Growth & Income ETF	97.58%	48.93%
WEEK Roundhill Weekly T-Bill ETF	3.70%	3.27%

Frequently Asked Questions

Can I hold both MSII and WEEK in my portfolio?

MSII 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, MSII or WEEK?

MSII has higher volatility (21.17%) compared to WEEK (0.16%). In terms of maximum drawdown, MSII dropped -78.73% vs WEEK's -0.13%.

Which ETF is better, MSII or WEEK?

On 1-year performance, WEEK leads with 3.72% vs -70.57% for MSII. 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, MSII or WEEK?

Over the 1-year period, WEEK has performed better with a 3.72% return vs -70.57%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MSII or WEEK?

WEEK is cheaper with a 0.19% expense ratio, compared with 0.99% for MSII.

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

MSII has the higher dividend yield at 97.58%, compared with 3.70% for WEEK.

What is the main difference between MSII and WEEK?

MSII is categorized as Leveraged Equities, while WEEK is Ultrashort Bond. They also come from different issuers: REX and Roundhill. Their fees differ too: 0.99% for MSII and 0.19% for WEEK.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (8.53 vs -0.98), 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.