WEEK vs. BOXX

Last updated Jun 23, 2026

WEEK (Roundhill Weekly T-Bill ETF) and BOXX (Alpha Architect 1-3 Month Box ETF) are both Ultrashort Bond funds. WEEK is actively managed, while BOXX is passively managed. Over the past year, WEEK returned 3.83% vs 4.02% for BOXX. At a 0.15 correlation, their price movements are largely independent. Both charge a 0.19% expense ratio.

Performance

WEEK vs. BOXX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill Weekly T-Bill ETF (WEEK) and Alpha Architect 1-3 Month Box ETF (BOXX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with WEEK having a 1.65% return and BOXX slightly higher at 1.72%.

WEEK

• 1D: 0.01%
• 1M: 0.33%
• YTD: 1.65%
• 6M: 1.77%
• 1Y: 3.83%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BOXX

• 1D: 0.02%
• 1M: 0.18%
• YTD: 1.72%
• 6M: 1.87%
• 1Y: 4.02%
• 3Y*: 4.71%
• 5Y*: —
• 10Y*: —

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

WEEK vs. BOXX - Yearly Performance Comparison

	2026 (YTD)	2025
WEEK Roundhill Weekly T-Bill ETF	1.65%	3.37%
BOXX Alpha Architect 1-3 Month Box ETF	1.72%	3.53%

Correlation

The correlation between WEEK and BOXX 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	0.15

Return for Risk

WEEK vs. BOXX — Risk / Return Rank

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

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

BOXX

BOXX Risk / Return Rank: 100
BOXX Sharpe Ratio Rank: 100
BOXX Sortino Ratio Rank: 99
BOXX Omega Ratio Rank: 99
BOXX Calmar Ratio Rank: 99
BOXX Martin Ratio Rank: 100

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.

WEEK vs. BOXX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Weekly T-Bill ETF (WEEK) and Alpha Architect 1-3 Month Box ETF (BOXX). 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.

	WEEK	BOXX	Difference
Sharpe ratio: Return per unit of total volatility	9.04	12.63	-3.59
Sortino ratio: Return per unit of downside risk	18.70	35.92	-17.22
Omega ratio: Gain probability vs. loss probability	4.42	9.07	-4.65
Calmar ratio: Return relative to maximum drawdown	29.62	58.74	-29.12
Martin ratio: Return relative to average drawdown	256.61	507.08	-250.46

WEEK vs. BOXX - Sharpe Ratio Comparison

The current WEEK Sharpe Ratio is 9.04, which is comparable to the BOXX Sharpe Ratio of 12.63. The chart below compares the historical Sharpe Ratios of WEEK and BOXX, 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

WEEK vs. BOXX - Drawdown Comparison

The maximum WEEK drawdown since its inception was -0.13%, which is greater than BOXX's maximum drawdown of -0.12%. Use the drawdown chart below to compare losses from any high point for WEEK and BOXX.

Drawdown Indicators

	WEEK	BOXX	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-0.12%	-0.01%
Max Drawdown (1Y) Largest decline over 1 year	-0.13%	-0.07%	-0.06%
Max Drawdown (3Y) Largest decline over 3 years	—	-0.12%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.01%	-0.00%	-0.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.01%	0.00%

Volatility

WEEK vs. BOXX - Volatility Comparison

Roundhill Weekly T-Bill ETF (WEEK) has a higher volatility of 0.13% compared to Alpha Architect 1-3 Month Box ETF (BOXX) at 0.12%. This indicates that WEEK's price experiences larger fluctuations and is considered to be riskier than BOXX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WEEK	BOXX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.13%	0.12%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	0.27%	0.26%	+0.01%
Volatility (1Y) Calculated over the trailing 1-year period	0.43%	0.32%	+0.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.39%	0.37%	+0.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.39%	0.37%	+0.02%

WEEK vs. BOXX - Expense Ratio Comparison

Both WEEK and BOXX have an expense ratio of 0.19%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

WEEK vs. BOXX - Dividend Comparison

WEEK's dividend yield for the trailing twelve months is around 3.70%, while BOXX has not paid dividends to shareholders.

Position	TTM	2025	2024
BOXX Alpha Architect 1-3 Month Box ETF	0.00%	0.00%	0.26%
WEEK Roundhill Weekly T-Bill ETF	3.70%	3.27%	0.00%

Frequently Asked Questions

Can I hold both WEEK and BOXX in my portfolio?

WEEK and BOXX 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, WEEK or BOXX?

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

Which ETF is better, WEEK or BOXX?

On 1-year performance, BOXX leads with 4.02% vs 3.83% for WEEK. Both ETFs have the same 0.19% expense ratio. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, WEEK or BOXX?

Over the 1-year period, BOXX has performed better with a 4.02% return vs 3.83%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, WEEK or BOXX?

WEEK and BOXX have the same expense ratio: 0.19% per year.

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

WEEK has the higher dividend yield at 3.70%, compared with 0.00% for BOXX.

What is the main difference between WEEK and BOXX?

They also come from different issuers: Roundhill and Alpha Architect.

Which has better risk-adjusted returns?

BOXX currently has the higher Sharpe Ratio (12.63 vs 9.04), 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.