UX vs. BOXX

Last updated Jun 24, 2026

UX (Roundhill Uranium ETF) and BOXX (Alpha Architect 1-3 Month Box ETF) are both exchange-traded funds - UX is a Uranium fund actively managed by Roundhill, while BOXX is a Ultrashort Bond fund tracking the Solactive 1-3 Month US T-Bill Index. UX is actively managed, while BOXX is passively managed. Over the past year, UX returned -0.88% vs 3.98% for BOXX. At a correlation of -0.09, they often move in opposite directions. UX charges 0.75%/yr vs 0.19%/yr for BOXX.

Performance

UX vs. BOXX - Performance Comparison

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

Returns By Period

In the year-to-date period, UX achieves a -5.87% return, which is significantly lower than BOXX's 1.70% return.

UX

• 1D: -0.14%
• 1M: -4.39%
• YTD: -5.87%
• 6M: -5.85%
• 1Y: -0.88%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BOXX

• 1D: -0.02%
• 1M: 0.16%
• YTD: 1.70%
• 6M: 1.82%
• 1Y: 3.98%
• 3Y*: 4.70%
• 5Y*: —
• 10Y*: —

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

UX vs. BOXX - Yearly Performance Comparison

	2026 (YTD)	2025
UX Roundhill Uranium ETF	-5.87%	18.96%
BOXX Alpha Architect 1-3 Month Box ETF	1.70%	3.97%

Correlation

The correlation between UX and BOXX is -0.09, 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	-0.09
Correlation (All Time) Calculated using the full available price history since Jan 29, 2025	-0.09

Return for Risk

UX vs. BOXX — Risk / Return Rank

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

UX

UX Risk / Return Rank: 9
UX Sharpe Ratio Rank: 9
UX Sortino Ratio Rank: 9
UX Omega Ratio Rank: 9
UX Calmar Ratio Rank: 9
UX Martin Ratio Rank: 8

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.

UX vs. BOXX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Uranium ETF (UX) 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.

	UX	BOXX	Difference
Sharpe ratio: Return per unit of total volatility	-0.03	12.43	-12.46
Sortino ratio: Return per unit of downside risk	0.21	35.10	-34.90
Omega ratio: Gain probability vs. loss probability	1.02	8.71	-7.69
Calmar ratio: Return relative to maximum drawdown	-0.04	58.08	-58.12
Martin ratio: Return relative to average drawdown	-0.07	496.82	-496.89

UX vs. BOXX - Sharpe Ratio Comparison

The current UX Sharpe Ratio is -0.03, which is lower than the BOXX Sharpe Ratio of 12.43. The chart below compares the historical Sharpe Ratios of UX 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

UX vs. BOXX - Drawdown Comparison

The maximum UX drawdown since its inception was -24.92%, which is greater than BOXX's maximum drawdown of -0.12%. Use the drawdown chart below to compare losses from any high point for UX and BOXX.

Drawdown Indicators

	UX	BOXX	Difference
Max Drawdown Largest peak-to-trough decline	-24.92%	-0.12%	-24.80%
Max Drawdown (1Y) Largest decline over 1 year	-24.92%	-0.07%	-24.85%
Max Drawdown (3Y) Largest decline over 3 years	—	-0.12%	—
Current Drawdown Current decline from peak	-23.84%	-0.02%	-23.82%
Average Drawdown Average peak-to-trough decline	-10.58%	-0.00%	-10.58%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.97%	0.01%	+12.96%

Volatility

UX vs. BOXX - Volatility Comparison

Roundhill Uranium ETF (UX) has a higher volatility of 7.95% compared to Alpha Architect 1-3 Month Box ETF (BOXX) at 0.12%. This indicates that UX'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

	UX	BOXX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.95%	0.12%	+7.83%
Volatility (6M) Calculated over the trailing 6-month period	24.25%	0.26%	+23.99%
Volatility (1Y) Calculated over the trailing 1-year period	34.10%	0.32%	+33.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	35.99%	0.37%	+35.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.99%	0.37%	+35.62%

UX vs. BOXX - Expense Ratio Comparison

UX has a 0.75% expense ratio, which is higher than BOXX's 0.19% expense ratio.

Dividends

UX vs. BOXX - Dividend Comparison

UX's dividend yield for the trailing twelve months is around 1.57%, 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%
UX Roundhill Uranium ETF	1.57%	1.48%	0.00%

Frequently Asked Questions

Can I hold both UX and BOXX in my portfolio?

UX and BOXX have a correlation of -0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, UX or BOXX?

UX has higher volatility (7.95%) compared to BOXX (0.12%). In terms of maximum drawdown, UX dropped -24.92% vs BOXX's -0.12%.

Which ETF is better, UX or BOXX?

On 1-year performance, BOXX leads with 3.98% vs -0.88% for UX. On fees, BOXX is cheaper at 0.19% per year. On volatility, BOXX 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, UX or BOXX?

Over the 1-year period, BOXX has performed better with a 3.98% return vs -0.88%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, UX or BOXX?

BOXX is cheaper with a 0.19% expense ratio, compared with 0.75% for UX.

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

UX has the higher dividend yield at 1.57%, compared with 0.00% for BOXX.

What is the main difference between UX and BOXX?

UX is categorized as Uranium, while BOXX is Ultrashort Bond. They also come from different issuers: Roundhill and Alpha Architect. Their fees differ too: 0.75% for UX and 0.19% for BOXX.

Which has better risk-adjusted returns?

BOXX currently has the higher Sharpe Ratio (12.43 vs -0.03), 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.