COSW vs. OMAH

Last updated Jun 4, 2026

COSW (Roundhill COST WeeklyPay ETF) and OMAH (VistaShares Target 15™ Berkshire Select Income ETF) are both Derivative Income funds. Both are actively managed. At a 0.15 correlation, their price movements are largely independent. COSW charges 0.99%/yr vs 0.95%/yr for OMAH.

Performance

COSW vs. OMAH - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Roundhill COST WeeklyPay ETF (COSW) and VistaShares Target 15™ Berkshire Select Income ETF (OMAH). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COSW achieves a 12.13% return, which is significantly higher than OMAH's 4.56% return.

COSW

• 1D: 0.92%
• 1M: -6.40%
• YTD: 12.13%
• 6M: 2.92%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

OMAH

• 1D: -0.70%
• 1M: 0.44%
• YTD: 4.56%
• 6M: 4.00%
• 1Y: 11.44%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

COSW vs. OMAH - Yearly Performance Comparison

	2026 (YTD)	2025
COSW Roundhill COST WeeklyPay ETF	12.13%	-10.71%
OMAH VistaShares Target 15™ Berkshire Select Income ETF	4.56%	0.86%

Correlation

The correlation between COSW and OMAH is 0.15, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Oct 24, 2025	0.15

COSW vs. OMAH - Sectors Allocation Comparison

Sectors	COSW	OMAH
Consumer Defensive	7.9%	16.2%
Basic Materials	-	-
Communication Services	-	9.8%
Consumer Cyclical	-	4.1%
Energy	-	10.5%
Financial Services	-	38.9%
Healthcare	-	7.0%
Industrials	-	-
Real Estate	-	-
Technology	-	13.6%
Utilities	-	-

Return for Risk

COSW vs. OMAH — Risk / Return Rank

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

OMAH

OMAH Risk / Return Rank: 49
OMAH Sharpe Ratio Rank: 39
OMAH Sortino Ratio Rank: 38
OMAH Omega Ratio Rank: 37
OMAH Calmar Ratio Rank: 75
OMAH Martin Ratio Rank: 54

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.

COSW vs. OMAH - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Roundhill COST WeeklyPay ETF (COSW) and VistaShares Target 15™ Berkshire Select Income ETF (OMAH). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	COSW	OMAH	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.43	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.01	0.70	-0.69

Drawdowns

COSW vs. OMAH - Drawdown Comparison

The maximum COSW drawdown since its inception was -16.24%, which is greater than OMAH's maximum drawdown of -11.83%. Use the drawdown chart below to compare losses from any high point for COSW and OMAH.

Drawdown Indicators

	COSW	OMAH	Difference
Max Drawdown Largest peak-to-trough decline	-16.24%	-11.83%	-4.41%
Max Drawdown (1Y) Largest decline over 1 year	—	-3.00%	—
Current Drawdown Current decline from peak	-14.62%	-2.65%	-11.97%
Average Drawdown Average peak-to-trough decline	-4.17%	-1.26%	-2.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.21%	—

Volatility

Volatility by Period

	COSW	OMAH	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	1.93%	—
Volatility (6M) Calculated over the trailing 6-month period	—	5.49%	—
Volatility (1Y) Calculated over the trailing 1-year period	26.10%	8.05%	+18.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.10%	13.21%	+12.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.10%	13.21%	+12.89%

COSW vs. OMAH - Expense Ratio Comparison

COSW has a 0.99% expense ratio, which is higher than OMAH's 0.95% expense ratio.

Dividends

COSW vs. OMAH - Dividend Comparison

COSW's dividend yield for the trailing twelve months is around 18.13%, more than OMAH's 15.44% yield.

Position	TTM	2025
COSW Roundhill COST WeeklyPay ETF	18.13%	4.96%
OMAH VistaShares Target 15™ Berkshire Select Income ETF	15.44%	12.86%

Frequently Asked Questions

Can I hold both COSW and OMAH in my portfolio?

COSW and OMAH have a correlation of 0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, COSW or OMAH?

On fees, OMAH is cheaper at 0.95% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, COSW or OMAH?

OMAH is cheaper with a 0.95% expense ratio, compared with 0.99% for COSW.

Which ETF pays a higher dividend yield, COSW or OMAH?

COSW has the higher dividend yield at 18.13%, compared with 15.44% for OMAH.

What is the main difference between COSW and OMAH?

They also come from different issuers: Roundhill and VistaShares. Their fees differ too: 0.99% for COSW and 0.95% for OMAH.