CNBS vs. WEEK

Last updated Jun 5, 2026

CNBS (Amplify Seymour Cannabis ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - CNBS is a Cannabis fund actively managed by Amplify, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. Both are actively managed. Over the past year, CNBS returned 91.63% vs 3.80% for WEEK. At a correlation of -0.13, they often move in opposite directions. CNBS charges 0.75%/yr vs 0.19%/yr for WEEK.

Performance

CNBS vs. WEEK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Amplify Seymour Cannabis ETF (CNBS) and Roundhill Weekly T-Bill ETF (WEEK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CNBS achieves a 4.70% return, which is significantly higher than WEEK's 1.43% return.

CNBS

• 1D: 6.54%
• 1M: 0.77%
• YTD: 4.70%
• 6M: 26.27%
• 1Y: 91.63%
• 3Y*: -0.72%
• 5Y*: -32.48%
• 10Y*: —

WEEK

• 1D: -0.01%
• 1M: 0.26%
• YTD: 1.43%
• 6M: 1.74%
• 1Y: 3.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CNBS vs. WEEK - Yearly Performance Comparison

	2026 (YTD)	2025
CNBS Amplify Seymour Cannabis ETF	4.70%	53.72%
WEEK Roundhill Weekly T-Bill ETF	1.43%	3.37%

Correlation

The correlation between CNBS and WEEK is -0.14, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.14
Correlation (All Time) Calculated using the full available price history since Mar 7, 2025	-0.13

Return for Risk

CNBS vs. WEEK — Risk / Return Rank

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

CNBS

CNBS Risk / Return Rank: 33
CNBS Sharpe Ratio Rank: 25
CNBS Sortino Ratio Rank: 40
CNBS Omega Ratio Rank: 37
CNBS Calmar Ratio Rank: 37
CNBS Martin Ratio Rank: 25

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.

CNBS vs. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Amplify Seymour Cannabis ETF (CNBS) 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.

	CNBS	WEEK	Difference
Sharpe ratio: Return per unit of total volatility	0.88	9.26	-8.38
Sortino ratio: Return per unit of downside risk	2.02	19.07	-17.05
Omega ratio: Gain probability vs. loss probability	1.24	4.61	-3.37
Calmar ratio: Return relative to maximum drawdown	1.80	29.41	-27.61
Martin ratio: Return relative to average drawdown	3.30	262.85	-259.55
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CNBS vs. WEEK - Sharpe Ratio Comparison

The current CNBS Sharpe Ratio is 0.88, which is lower than the WEEK Sharpe Ratio of 9.26. The chart below compares the historical Sharpe Ratios of CNBS 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

	CNBS	WEEK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.88	9.26	-8.38
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.50	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.39	9.99	-10.39

Drawdowns

CNBS vs. WEEK - Drawdown Comparison

The maximum CNBS drawdown since its inception was -95.71%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for CNBS and WEEK.

Drawdown Indicators

	CNBS	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-95.71%	-0.13%	-95.58%
Max Drawdown (1Y) Largest decline over 1 year	-51.25%	-0.13%	-51.12%
Max Drawdown (3Y) Largest decline over 3 years	-73.41%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-93.58%	—	—
Current Drawdown Current decline from peak	-90.88%	-0.01%	-90.87%
Average Drawdown Average peak-to-trough decline	-71.27%	-0.01%	-71.26%
Ulcer Index Depth and duration of drawdowns from previous peaks	27.83%	0.01%	+27.82%

Volatility

CNBS vs. WEEK - Volatility Comparison

Amplify Seymour Cannabis ETF (CNBS) has a higher volatility of 18.65% compared to Roundhill Weekly T-Bill ETF (WEEK) at 0.08%. This indicates that CNBS's price experiences larger fluctuations and is considered to be riskier than WEEK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CNBS	WEEK	Difference
Volatility (1M) Calculated over the trailing 1-month period	18.65%	0.08%	+18.57%
Volatility (6M) Calculated over the trailing 6-month period	76.84%	0.25%	+76.59%
Volatility (1Y) Calculated over the trailing 1-year period	105.28%	0.41%	+104.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	64.80%	0.39%	+64.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	61.37%	0.39%	+60.98%

CNBS vs. WEEK - Expense Ratio Comparison

CNBS has a 0.75% expense ratio, which is higher than WEEK's 0.19% expense ratio.

Dividends

CNBS vs. WEEK - Dividend Comparison

CNBS has not paid dividends to shareholders, while WEEK's dividend yield for the trailing twelve months is around 3.72%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
CNBS Amplify Seymour Cannabis ETF	0.00%	0.00%	43.54%	0.00%	0.00%	0.00%	0.58%	0.58%
WEEK Roundhill Weekly T-Bill ETF	3.72%	3.27%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both CNBS and WEEK in my portfolio?

CNBS and WEEK have a correlation of -0.14, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CNBS or WEEK?

CNBS has higher volatility (18.65%) compared to WEEK (0.08%). In terms of maximum drawdown, CNBS dropped -95.71% vs WEEK's -0.13%.

Which ETF is better, CNBS or WEEK?

On 1-year performance, CNBS leads with 91.63% vs 3.80% for WEEK. On fees, WEEK is cheaper at 0.19% per year. On volatility, WEEK has been the lower-risk option at 0.08%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CNBS or WEEK?

Over the 1-year period, CNBS has performed better with a 91.63% return vs 3.80%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CNBS or WEEK?

WEEK is cheaper with a 0.19% expense ratio, compared with 0.75% for CNBS.

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

WEEK has the higher dividend yield at 3.72%, compared with 0.00% for CNBS.

What is the main difference between CNBS and WEEK?

CNBS is categorized as Cannabis, while WEEK is Ultrashort Bond. They also come from different issuers: Amplify and Roundhill. Their fees differ too: 0.75% for CNBS and 0.19% for WEEK.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (9.26 vs 0.88), 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.