WEEK vs. BILZ

Last updated Jun 4, 2026

WEEK (Roundhill Weekly T-Bill ETF) and BILZ (PIMCO Ultra Short Government Active Exchange-Traded Fund) are both Ultrashort Bond funds. Both are actively managed. Over the past year, WEEK returned 3.81% vs 3.91% for BILZ. At a 0.29 correlation, their price movements are largely independent. WEEK charges 0.19%/yr vs 0.14%/yr for BILZ.

Performance

WEEK vs. BILZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill Weekly T-Bill ETF (WEEK) and PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ). 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 1.44% return and BILZ slightly higher at 1.47%.

WEEK

• 1D: 0.02%
• 1M: 0.28%
• YTD: 1.44%
• 6M: 1.74%
• 1Y: 3.81%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BILZ

• 1D: 0.00%
• 1M: 0.28%
• YTD: 1.47%
• 6M: 1.76%
• 1Y: 3.91%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

WEEK vs. BILZ - Yearly Performance Comparison

	2026 (YTD)	2025
WEEK Roundhill Weekly T-Bill ETF	1.44%	3.37%
BILZ PIMCO Ultra Short Government Active Exchange-Traded Fund	1.47%	3.45%

Correlation

The correlation between WEEK and BILZ is 0.27, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.27
Correlation (All Time) Calculated using the full available price history since Mar 7, 2025	0.29

Return for Risk

WEEK vs. BILZ — 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

BILZ

BILZ Risk / Return Rank: 100
BILZ Sharpe Ratio Rank: 100
BILZ Sortino Ratio Rank: 100
BILZ Omega Ratio Rank: 100
BILZ Calmar Ratio Rank: 100
BILZ 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. BILZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Weekly T-Bill ETF (WEEK) and PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ). 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.

	WEEK	BILZ	Difference
Sharpe ratio: Return per unit of total volatility	9.29	19.09	-9.79
Sortino ratio: Return per unit of downside risk	19.14	125.25	-106.11
Omega ratio: Gain probability vs. loss probability	4.65	53.31	-48.66
Calmar ratio: Return relative to maximum drawdown	29.49	198.55	-169.06
Martin ratio: Return relative to average drawdown	263.82	2,000.92	-1,737.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WEEK vs. BILZ - Sharpe Ratio Comparison

The current WEEK Sharpe Ratio is 9.29, which is lower than the BILZ Sharpe Ratio of 19.09. The chart below compares the historical Sharpe Ratios of WEEK and BILZ, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	WEEK	BILZ	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	9.29	19.09	-9.79
Sharpe Ratio (All Time) Calculated using the full available price history	10.05	10.48	-0.43

Drawdowns

WEEK vs. BILZ - Drawdown Comparison

The maximum WEEK drawdown since its inception was -0.13%, smaller than the maximum BILZ drawdown of -0.52%. Use the drawdown chart below to compare losses from any high point for WEEK and BILZ.

Drawdown Indicators

	WEEK	BILZ	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-0.52%	+0.39%
Max Drawdown (1Y) Largest decline over 1 year	-0.13%	-0.02%	-0.11%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.01%	-0.01%	0.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.00%	+0.01%

Volatility

WEEK vs. BILZ - Volatility Comparison

Roundhill Weekly T-Bill ETF (WEEK) and PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ) have volatilities of 0.07% and 0.07%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WEEK	BILZ	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.07%	0.07%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	0.25%	0.14%	+0.11%
Volatility (1Y) Calculated over the trailing 1-year period	0.41%	0.21%	+0.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.39%	0.43%	-0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.39%	0.43%	-0.04%

WEEK vs. BILZ - Expense Ratio Comparison

WEEK has a 0.19% expense ratio, which is higher than BILZ's 0.14% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

WEEK vs. BILZ - Dividend Comparison

WEEK's dividend yield for the trailing twelve months is around 3.72%, less than BILZ's 4.07% yield.

Position	TTM	2025	2024	2023
BILZ PIMCO Ultra Short Government Active Exchange-Traded Fund	4.07%	4.19%	4.95%	2.23%
WEEK Roundhill Weekly T-Bill ETF	3.72%	3.27%	0.00%	0.00%

Frequently Asked Questions

Can I hold both WEEK and BILZ in my portfolio?

WEEK and BILZ have a correlation of 0.27, 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 BILZ?

BILZ has higher volatility (0.07%) compared to WEEK (0.07%). In terms of maximum drawdown, WEEK dropped -0.13% vs BILZ's -0.52%.

Which ETF is better, WEEK or BILZ?

On 1-year performance, BILZ leads with 3.91% vs 3.81% for WEEK. On fees, BILZ is cheaper at 0.14% per year. 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 BILZ?

Over the 1-year period, BILZ has performed better with a 3.91% return vs 3.81%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, WEEK or BILZ?

BILZ is cheaper with a 0.14% expense ratio, compared with 0.19% for WEEK.

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

BILZ has the higher dividend yield at 4.07%, compared with 3.72% for WEEK.

What is the main difference between WEEK and BILZ?

They also come from different issuers: Roundhill and PIMCO. Their fees differ too: 0.19% for WEEK and 0.14% for BILZ.

Which has better risk-adjusted returns?

BILZ currently has the higher Sharpe Ratio (19.09 vs 9.29), 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.