PBDE vs. CAOS

Last updated Jun 4, 2026

PBDE (PGIM S&P 500 Buffer 20 ETF - December) and CAOS (Alpha Architect Tail Risk ETF) are both exchange-traded funds - PBDE is a Defined Outcome fund actively managed by PGIM, while CAOS is a Options Trading fund actively managed by Alpha Architect. Both are actively managed. Over the past year, PBDE returned 15.21% vs 1.88% for CAOS. At a correlation of -0.33, they often move in opposite directions. PBDE charges 0.50%/yr vs 0.63%/yr for CAOS.

Performance

PBDE vs. CAOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PGIM S&P 500 Buffer 20 ETF - December (PBDE) 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, PBDE achieves a 4.81% return, which is significantly higher than CAOS's 0.82% return.

PBDE

• 1D: -0.13%
• 1M: 1.81%
• YTD: 4.81%
• 6M: 5.33%
• 1Y: 15.21%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CAOS

• 1D: 0.12%
• 1M: -0.09%
• YTD: 0.82%
• 6M: 0.69%
• 1Y: 1.88%
• 3Y*: 4.26%
• 5Y*: —
• 10Y*: —

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

PBDE vs. CAOS - Yearly Performance Comparison

	2026 (YTD)	2025	2024
PBDE PGIM S&P 500 Buffer 20 ETF - December	4.81%	11.87%	5.01%
CAOS Alpha Architect Tail Risk ETF	0.82%	2.55%	3.70%

Correlation

The correlation between PBDE and CAOS is -0.34, 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	-0.34
Correlation (All Time) Calculated using the full available price history since May 28, 2024	-0.33

Return for Risk

PBDE vs. CAOS — Risk / Return Rank

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

PBDE

PBDE Risk / Return Rank: 86
PBDE Sharpe Ratio Rank: 84
PBDE Sortino Ratio Rank: 89
PBDE Omega Ratio Rank: 88
PBDE Calmar Ratio Rank: 77
PBDE Martin Ratio Rank: 90

CAOS

CAOS Risk / Return Rank: 40
CAOS Sharpe Ratio Rank: 34
CAOS Sortino Ratio Rank: 37
CAOS Omega Ratio Rank: 39
CAOS Calmar Ratio Rank: 49
CAOS Martin Ratio Rank: 39

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.

PBDE vs. CAOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PGIM S&P 500 Buffer 20 ETF - December (PBDE) 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.

	PBDE	CAOS	Difference
Sharpe ratio: Return per unit of total volatility	2.70	1.24	+1.46
Sortino ratio: Return per unit of downside risk	4.03	1.98	+2.05
Omega ratio: Gain probability vs. loss probability	1.55	1.26	+0.29
Calmar ratio: Return relative to maximum drawdown	3.88	2.49	+1.39
Martin ratio: Return relative to average drawdown	20.58	6.22	+14.36
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PBDE vs. CAOS - Sharpe Ratio Comparison

The current PBDE Sharpe Ratio is 2.70, which is higher than the CAOS Sharpe Ratio of 1.24. The chart below compares the historical Sharpe Ratios of PBDE 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.

Sharpe Ratios by Period

	PBDE	CAOS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.70	1.24	+1.46
Sharpe Ratio (All Time) Calculated using the full available price history	1.53	1.21	+0.32

Drawdowns

PBDE vs. CAOS - Drawdown Comparison

The maximum PBDE drawdown since its inception was -8.73%, which is greater than CAOS's maximum drawdown of -3.60%. Use the drawdown chart below to compare losses from any high point for PBDE and CAOS.

Drawdown Indicators

	PBDE	CAOS	Difference
Max Drawdown Largest peak-to-trough decline	-8.73%	-3.60%	-5.13%
Max Drawdown (1Y) Largest decline over 1 year	-3.94%	-0.76%	-3.18%
Max Drawdown (3Y) Largest decline over 3 years	—	-3.60%	—
Current Drawdown Current decline from peak	-0.13%	-1.07%	+0.94%
Average Drawdown Average peak-to-trough decline	-0.76%	-0.90%	+0.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.74%	0.30%	+0.44%

Volatility

PBDE vs. CAOS - Volatility Comparison

PGIM S&P 500 Buffer 20 ETF - December (PBDE) has a higher volatility of 0.81% compared to Alpha Architect Tail Risk ETF (CAOS) at 0.26%. This indicates that PBDE'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

	PBDE	CAOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.81%	0.26%	+0.55%
Volatility (6M) Calculated over the trailing 6-month period	4.08%	1.03%	+3.05%
Volatility (1Y) Calculated over the trailing 1-year period	5.66%	1.52%	+4.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.15%	4.26%	+2.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.15%	4.26%	+2.89%

PBDE vs. CAOS - Expense Ratio Comparison

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

Dividends

PBDE vs. CAOS - Dividend Comparison

Neither PBDE nor CAOS has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both PBDE and CAOS in my portfolio?

PBDE and CAOS have a correlation of -0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PBDE or CAOS?

PBDE has higher volatility (0.81%) compared to CAOS (0.26%). In terms of maximum drawdown, PBDE dropped -8.73% vs CAOS's -3.60%.

Which ETF is better, PBDE or CAOS?

On 1-year performance, PBDE leads with 15.21% vs 1.88% for CAOS. On fees, PBDE is cheaper at 0.50% per year. On volatility, CAOS has been the lower-risk option at 0.26%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PBDE or CAOS?

Over the 1-year period, PBDE has performed better with a 15.21% return vs 1.88%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PBDE or CAOS?

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

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

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

What is the main difference between PBDE and CAOS?

PBDE 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 PBDE and 0.63% for CAOS.

Which has better risk-adjusted returns?

PBDE currently has the higher Sharpe Ratio (2.70 vs 1.24), 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.