OAKM vs. CAOS

Last updated Jun 18, 2026

OAKM (Oakmark U.S. Large Cap ETF) and CAOS (Alpha Architect Tail Risk ETF) are both exchange-traded funds - OAKM is a Large Cap Value Equities fund actively managed by Oakmark, while CAOS is a Options Trading fund actively managed by Alpha Architect. Both are actively managed. Over the past year, OAKM returned 12.48% vs 1.59% for CAOS. At a correlation of -0.31, they often move in opposite directions. OAKM charges 0.59%/yr vs 0.63%/yr for CAOS.

Performance

OAKM vs. CAOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark U.S. Large Cap ETF (OAKM) and Alpha Architect Tail Risk ETF (CAOS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OAKM achieves a -1.80% return, which is significantly lower than CAOS's 0.64% return.

OAKM

• 1D: -1.87%
• 1M: -0.36%
• YTD: -1.80%
• 6M: -1.17%
• 1Y: 12.48%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CAOS

• 1D: 0.00%
• 1M: -0.26%
• YTD: 0.64%
• 6M: 0.50%
• 1Y: 1.59%
• 3Y*: 3.89%
• 5Y*: —
• 10Y*: —

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

OAKM vs. CAOS - Yearly Performance Comparison

	2026 (YTD)	2025	2024
OAKM Oakmark U.S. Large Cap ETF	-1.80%	21.46%	-5.20%
CAOS Alpha Architect Tail Risk ETF	0.64%	2.55%	0.47%

Correlation

The correlation between OAKM and CAOS is -0.26, 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	-0.26
Correlation (All Time) Calculated using the full available price history since Dec 3, 2024	-0.31

Return for Risk

OAKM vs. CAOS — Risk / Return Rank

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

OAKM

OAKM Risk / Return Rank: 30
OAKM Sharpe Ratio Rank: 28
OAKM Sortino Ratio Rank: 27
OAKM Omega Ratio Rank: 26
OAKM Calmar Ratio Rank: 36
OAKM Martin Ratio Rank: 32

CAOS

CAOS Risk / Return Rank: 36
CAOS Sharpe Ratio Rank: 31
CAOS Sortino Ratio Rank: 33
CAOS Omega Ratio Rank: 34
CAOS Calmar Ratio Rank: 44
CAOS Martin Ratio Rank: 35

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.

OAKM vs. CAOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark U.S. Large Cap ETF (OAKM) and Alpha Architect Tail Risk ETF (CAOS). 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.

	OAKM	CAOS	Difference
Sharpe ratio: Return per unit of total volatility	0.96	1.06	-0.11
Sortino ratio: Return per unit of downside risk	1.43	1.69	-0.26
Omega ratio: Gain probability vs. loss probability	1.17	1.22	-0.05
Calmar ratio: Return relative to maximum drawdown	1.74	2.10	-0.36
Martin ratio: Return relative to average drawdown	4.41	5.06	-0.64

OAKM vs. CAOS - Sharpe Ratio Comparison

The current OAKM Sharpe Ratio is 0.96, which is comparable to the CAOS Sharpe Ratio of 1.06. The chart below compares the historical Sharpe Ratios of OAKM and CAOS, 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

OAKM vs. CAOS - Drawdown Comparison

The maximum OAKM drawdown since its inception was -15.24%, which is greater than CAOS's maximum drawdown of -3.89%. Use the drawdown chart below to compare losses from any high point for OAKM and CAOS.

Drawdown Indicators

	OAKM	CAOS	Difference
Max Drawdown Largest peak-to-trough decline	-15.24%	-3.89%	-11.35%
Max Drawdown (1Y) Largest decline over 1 year	-7.19%	-0.76%	-6.43%
Max Drawdown (3Y) Largest decline over 3 years	—	-3.60%	—
Current Drawdown Current decline from peak	-4.23%	-1.25%	-2.98%
Average Drawdown Average peak-to-trough decline	-2.80%	-0.92%	-1.88%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.83%	0.31%	+2.52%

Volatility

OAKM vs. CAOS - Volatility Comparison

Oakmark U.S. Large Cap ETF (OAKM) has a higher volatility of 4.00% compared to Alpha Architect Tail Risk ETF (CAOS) at 0.30%. This indicates that OAKM's price experiences larger fluctuations and is considered to be riskier than CAOS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OAKM	CAOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.00%	0.30%	+3.70%
Volatility (6M) Calculated over the trailing 6-month period	9.44%	1.04%	+8.40%
Volatility (1Y) Calculated over the trailing 1-year period	13.15%	1.50%	+11.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.48%	4.24%	+12.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.48%	4.24%	+12.24%

OAKM vs. CAOS - Expense Ratio Comparison

OAKM has a 0.59% expense ratio, which is lower than CAOS's 0.63% expense ratio.

Dividends

OAKM vs. CAOS - Dividend Comparison

OAKM's dividend yield for the trailing twelve months is around 0.68%, while CAOS has not paid dividends to shareholders.

Position	TTM	2025	2024
CAOS Alpha Architect Tail Risk ETF	0.00%	0.00%	0.00%
OAKM Oakmark U.S. Large Cap ETF	0.68%	0.67%	0.04%

Frequently Asked Questions

Can I hold both OAKM and CAOS in my portfolio?

OAKM and CAOS have a correlation of -0.26, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OAKM or CAOS?

OAKM has higher volatility (4.00%) compared to CAOS (0.30%). In terms of maximum drawdown, OAKM dropped -15.24% vs CAOS's -3.89%.

Which ETF is better, OAKM or CAOS?

On 1-year performance, OAKM leads with 12.48% vs 1.59% for CAOS. On fees, OAKM is cheaper at 0.59% per year. On volatility, CAOS has been the lower-risk option at 0.30%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, OAKM or CAOS?

Over the 1-year period, OAKM has performed better with a 12.48% return vs 1.59%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OAKM or CAOS?

OAKM is cheaper with a 0.59% expense ratio, compared with 0.63% for CAOS.

Which ETF pays a higher dividend yield, OAKM or CAOS?

OAKM has the higher dividend yield at 0.68%, compared with 0.00% for CAOS.

What is the main difference between OAKM and CAOS?

OAKM is categorized as Large Cap Value Equities, while CAOS is Options Trading. They also come from different issuers: Oakmark and Alpha Architect. Their fees differ too: 0.59% for OAKM and 0.63% for CAOS.

Which has better risk-adjusted returns?

CAOS currently has the higher Sharpe Ratio (1.06 vs 0.96), 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.