WEEK vs. CERY

Last updated Aug 4, 2026

WEEK (Roundhill Weekly T-Bill ETF) and CERY (SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF) are both exchange-traded funds - WEEK is a Ultrashort Bond fund actively managed by Roundhill, while CERY is a Commodities fund tracking the Bloomberg Enhanced Roll Yield Total Return Index. WEEK is actively managed, while CERY is passively managed. Over the past year, WEEK returned 3.64% vs 36.13% for CERY. Their -0.19 correlation means they have often moved in opposite directions in the past. WEEK charges 0.19%/yr vs 0.28%/yr for CERY.

Performance

WEEK vs. CERY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill Weekly T-Bill ETF (WEEK) and SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF (CERY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WEEK achieves a 1.97% return, which is significantly lower than CERY's 24.20% return.

WEEK

• 1D: -0.06%
• 1M: 0.19%
• 6M: 1.71%
• YTD: 1.97%
• 1Y: 3.64%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.81%

CERY

• 1D: -1.39%
• 1M: 6.29%
• 6M: 17.22%
• YTD: 24.20%
• 1Y: 36.13%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 23.30%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
CERY SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF	$4.83M	$9.95M	$6.88M
WEEK Roundhill Weekly T-Bill ETF	$3.69M	$3.40M	$3.85M

WEEK vs. CERY - Yearly Performance Comparison

	2026 (YTD)	2025
WEEK Roundhill Weekly T-Bill ETF	1.97%	3.37%
CERY SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF	24.20%	12.23%

Correlation

The correlation between WEEK and CERY is -0.24, meaning they have often moved in opposite directions in the past. This relationship can weaken or reverse as market conditions change.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	-0.24
Correlation (All Time) Calculated using the full available price history since Mar 6, 2025	-0.19

Return for Risk

WEEK vs. CERY — Risk / Return Rank

Compare historical risk-adjusted metric ranks 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

CERY

CERY Risk / Return Rank: 79
CERY Sharpe Ratio Rank: 89
CERY Sortino Ratio Rank: 85
CERY Omega Ratio Rank: 85
CERY Calmar Ratio Rank: 70
CERY Martin Ratio Rank: 69

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

WEEK vs. CERY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill Weekly T-Bill ETF (WEEK) and SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF (CERY). 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	CERY	Difference
Sharpe ratio: Return per unit of total volatility	8.43	2.24	+6.20
Sortino ratio: Return per unit of downside risk	17.15	2.94	+14.21
Omega ratio: Gain probability vs. loss probability	4.11	1.38	+2.73
Calmar ratio: Return relative to maximum drawdown	28.15	2.53	+25.62
Martin ratio: Return relative to average drawdown	235.37	8.67	+226.70

WEEK vs. CERY - Sharpe Ratio Comparison

The current WEEK Sharpe Ratio is 8.43, which is higher than the CERY Sharpe Ratio of 2.24. The chart below compares the historical Sharpe Ratios of WEEK and CERY, 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. CERY - Drawdown Comparison

The maximum WEEK drawdown since its inception was -0.13%, smaller than the maximum CERY drawdown of -14.33%. Use the drawdown chart below to compare losses from any high point for WEEK and CERY.

Drawdown Indicators

	WEEK	CERY	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-14.33%	+14.20%
Max Drawdown (1Y) Largest decline over 1 year	-0.13%	-14.33%	+14.20%
Current Drawdown Current decline from peak	-0.06%	-7.92%	+7.86%
Average Drawdown Average peak-to-trough decline	-0.01%	-2.70%	+2.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.02%	4.18%	-4.16%

Volatility

WEEK vs. CERY - Volatility Comparison

The current volatility for Roundhill Weekly T-Bill ETF (WEEK) is 0.12%, while SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF (CERY) has a volatility of 5.32%. This indicates that WEEK experiences smaller price fluctuations and is considered to be less risky than CERY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WEEK	CERY	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.12%	5.32%	-5.20%
Volatility (6M) Calculated over the trailing 6-month period	0.26%	13.28%	-13.02%
Volatility (1Y) Calculated over the trailing 1-year period	0.43%	16.26%	-15.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.39%	14.96%	-14.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.39%	14.96%	-14.57%

WEEK vs. CERY - Expense Ratio Comparison

WEEK has a 0.19% expense ratio, which is lower than CERY's 0.28% expense ratio.

Dividends

WEEK vs. CERY - Dividend Comparison

WEEK's dividend yield for the trailing twelve months is around 3.63%, less than CERY's 4.02% yield.

Position	TTM	2025	2024
CERY SPDR Bloomberg Enhanced Roll Yield Commodity Strategy No K-1 ETF	4.02%	4.99%	0.52%
WEEK Roundhill Weekly T-Bill ETF	3.63%	3.27%	0.00%

Frequently Asked Questions

Can I hold both WEEK and CERY in my portfolio?

WEEK and CERY have a correlation of -0.24, 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 CERY?

CERY has higher volatility (5.32%) compared to WEEK (0.12%). In terms of maximum drawdown, WEEK dropped -0.13% vs CERY's -14.33%.

Which ETF is better, WEEK or CERY?

On 1-year performance, CERY leads with 36.13% vs 3.64% for WEEK. On fees, WEEK is cheaper at 0.19% per year. On volatility, WEEK 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, WEEK or CERY?

Over the 1-year period, CERY has performed better with a 36.13% return vs 3.64%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, WEEK or CERY?

WEEK is cheaper with a 0.19% expense ratio, compared with 0.28% for CERY.

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

CERY has the higher dividend yield at 4.02%, compared with 3.63% for WEEK.

What is the main difference between WEEK and CERY?

WEEK is categorized as Ultrashort Bond, while CERY is Commodities. They also come from different issuers: Roundhill and State Street. Their fees differ too: 0.19% for WEEK and 0.28% for CERY.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (8.43 vs 2.24), 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.