PMDE vs. CAOS

Last updated Aug 2, 2026

PMDE (PGIM S&P 500 Max Buffer ETF - December) and CAOS (Alpha Architect Tail Risk ETF) are both exchange-traded funds - PMDE is a Defined Outcome fund tracking the SPDR S&P 500 ETF Trust (SPY), while CAOS is a Options Trading fund actively managed by Alpha Architect. PMDE is passively managed, while CAOS is actively managed. Their -0.38 correlation means they have often moved in opposite directions in the past. PMDE charges 0.50%/yr vs 0.63%/yr for CAOS.

Performance

PMDE vs. CAOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PGIM S&P 500 Max Buffer ETF - December (PMDE) 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, PMDE achieves a 3.38% return, which is significantly higher than CAOS's 0.76% return.

PMDE

• 1D: 0.17%
• 1M: 0.58%
• 6M: 2.98%
• YTD: 3.38%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

CAOS

• 1D: -0.06%
• 1M: -0.01%
• 6M: 0.16%
• YTD: 0.76%
• 1Y: 1.73%
• 3Y*: 3.48%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 4.70%

*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)
CAOS Alpha Architect Tail Risk ETF	$6.81M	$5.39M	$5.09M
PMDE PGIM S&P 500 Max Buffer ETF - December	$11.74K	$127.64K	$99.07K

PMDE vs. CAOS - Yearly Performance Comparison

	2026 (YTD)	2025
PMDE PGIM S&P 500 Max Buffer ETF - December	3.38%	0.44%
CAOS Alpha Architect Tail Risk ETF	0.76%	-0.14%

Correlation

The correlation between PMDE and CAOS is -0.38, meaning they have often moved in opposite directions in the past. This relationship can weaken or reverse as market conditions change.

	Correlation
Correlation (All Time) Calculated using the full available price history since Dec 1, 2025	-0.38

Return for Risk

PMDE vs. CAOS — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

PMDE

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

CAOS

CAOS Risk / Return Rank: 56
CAOS Sharpe Ratio Rank: 49
CAOS Sortino Ratio Rank: 55
CAOS Omega Ratio Rank: 54
CAOS Calmar Ratio Rank: 72
CAOS Martin Ratio Rank: 48

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.

PMDE vs. CAOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PGIM S&P 500 Max Buffer ETF - December (PMDE) 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.

	PMDE	CAOS	Difference
Sharpe ratio: Return per unit of total volatility	—	1.19	—
Sortino ratio: Return per unit of downside risk	—	1.89	—
Omega ratio: Gain probability vs. loss probability	—	1.24	—
Calmar ratio: Return relative to maximum drawdown	—	2.47	—
Martin ratio: Return relative to average drawdown	—	5.45	—

Drawdowns

PMDE vs. CAOS - Drawdown Comparison

The maximum PMDE drawdown since its inception was -1.59%, smaller than the maximum CAOS drawdown of -3.89%. Use the drawdown chart below to compare losses from any high point for PMDE and CAOS.

Drawdown Indicators

	PMDE	CAOS	Difference
Max Drawdown Largest peak-to-trough decline	-1.59%	-3.89%	+2.30%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.76%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-3.60%	—
Current Drawdown Current decline from peak	0.00%	-1.13%	+1.13%
Average Drawdown Average peak-to-trough decline	-0.23%	-0.92%	+0.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.34%	—

Volatility

Volatility by Period

	PMDE	CAOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.51%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.07%	—
Volatility (1Y) Calculated over the trailing 1-year period	2.37%	1.57%	+0.80%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.37%	4.18%	-1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.37%	4.18%	-1.81%

PMDE vs. CAOS - Expense Ratio Comparison

PMDE has a 0.50% expense ratio, which is lower than CAOS's 0.63% expense ratio.

Dividends

PMDE vs. CAOS - Dividend Comparison

Neither PMDE nor CAOS has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both PMDE and CAOS in my portfolio?

PMDE and CAOS have a correlation of -0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, PMDE or CAOS?

On fees, PMDE is cheaper at 0.50% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, PMDE or CAOS?

PMDE is cheaper with a 0.50% expense ratio, compared with 0.63% for CAOS.

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

PMDE and CAOS have nearly identical dividend yields, around 0.00%.

What is the main difference between PMDE and CAOS?

PMDE is categorized as Defined Outcome, while CAOS is Options Trading. They also come from different issuers: PGIM and Alpha Architect. Their fees differ too: 0.50% for PMDE and 0.63% for CAOS.