BILZ vs. WEEK

Last updated Jun 4, 2026

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

Performance

BILZ vs. WEEK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ) and Roundhill Weekly T-Bill ETF (WEEK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with BILZ having a 1.47% return and WEEK slightly lower at 1.44%.

BILZ

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

WEEK

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

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

BILZ vs. WEEK - Yearly Performance Comparison

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

Correlation

The correlation between BILZ and WEEK 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

BILZ vs. WEEK — Risk / Return Rank

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

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

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.

BILZ vs. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ) 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.

	BILZ	WEEK	Difference
Sharpe ratio Return per unit of total volatility	19.09	9.29	+9.79
Sortino ratio Return per unit of downside risk	125.25	19.14	+106.11
Omega ratio Gain probability vs. loss probability	53.31	4.65	+48.66
Calmar ratio Return relative to maximum drawdown	198.55	29.49	+169.06
Martin ratio Return relative to average drawdown	2,000.92	263.82	+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.

BILZ vs. WEEK - Sharpe Ratio Comparison

The current BILZ Sharpe Ratio is 19.09, which is higher than the WEEK Sharpe Ratio of 9.29. The chart below compares the historical Sharpe Ratios of BILZ 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.

Sharpe Ratios by Period

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

Drawdowns

BILZ vs. WEEK - Drawdown Comparison

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

Drawdown Indicators

	BILZ	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-0.52%	-0.13%	-0.39%
Max Drawdown (1Y) Largest decline over 1 year	-0.02%	-0.13%	+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	0.00%	0.01%	-0.01%

Volatility

BILZ vs. WEEK - Volatility Comparison

PIMCO Ultra Short Government Active Exchange-Traded Fund (BILZ) and Roundhill Weekly T-Bill ETF (WEEK) 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

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

BILZ vs. WEEK - Expense Ratio Comparison

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

Dividends

BILZ vs. WEEK - Dividend Comparison

BILZ's dividend yield for the trailing twelve months is around 4.07%, more than WEEK's 3.72% 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 BILZ and WEEK in my portfolio?

BILZ and WEEK 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, BILZ or WEEK?

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

Which ETF is better, BILZ or WEEK?

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, BILZ or WEEK?

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, BILZ or WEEK?

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

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

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

What is the main difference between BILZ and WEEK?

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

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.