CPPAX vs. DFCFX

Last updated Jun 4, 2026

CPPAX (American Funds Preservation Portfolio) and DFCFX (DFA Two-Year Fixed Income Portfolio) are both Short-Term Bond funds. Over the past 10 years, CPPAX returned 1.67%/yr vs 2.48%/yr for DFCFX. At a 0.36 correlation, their price movements are largely independent. CPPAX charges 0.61%/yr vs 0.21%/yr for DFCFX.

Performance

CPPAX vs. DFCFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds Preservation Portfolio (CPPAX) and DFA Two-Year Fixed Income Portfolio (DFCFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPPAX achieves a -0.09% return, which is significantly lower than DFCFX's 1.52% return. Over the past 10 years, CPPAX has underperformed DFCFX with an annualized return of 1.67%, while DFCFX has yielded a comparatively higher 2.48% annualized return.

CPPAX

• 1D: 0.00%
• 1M: 0.10%
• YTD: -0.09%
• 6M: 0.15%
• 1Y: 3.18%
• 3Y*: 3.96%
• 5Y*: 1.28%
• 10Y*: 1.67%

DFCFX

• 1D: 0.00%
• 1M: 0.31%
• YTD: 1.52%
• 6M: 1.77%
• 1Y: 2.87%
• 3Y*: 4.06%
• 5Y*: 3.78%
• 10Y*: 2.48%

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

CPPAX vs. DFCFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CPPAX American Funds Preservation Portfolio	-0.09%	5.51%	3.66%	4.09%	-6.14%	-0.62%	5.84%	3.92%	0.89%	0.96%
DFCFX DFA Two-Year Fixed Income Portfolio	1.52%	2.28%	5.33%	4.92%	-3.28%	8.60%	0.57%	2.65%	1.78%	0.92%

Correlation

The correlation between CPPAX and DFCFX is 0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.04
Correlation (3Y) Calculated over the trailing 3-year period	0.04
Correlation (5Y) Calculated over the trailing 5-year period	0.36
Correlation (10Y) Calculated over the trailing 10-year period	0.35
Correlation (All Time) Calculated using the full available price history since May 25, 2012	0.36

Over the past year, the correlation between CPPAX and DFCFX has dropped to 0.04 - well below their long-term average of 0.36, suggesting their price drivers have been diverging.

Return for Risk

CPPAX vs. DFCFX — Risk / Return Rank

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

CPPAX

CPPAX Risk / Return Rank: 31
CPPAX Sharpe Ratio Rank: 29
CPPAX Sortino Ratio Rank: 33
CPPAX Omega Ratio Rank: 39
CPPAX Calmar Ratio Rank: 26
CPPAX Martin Ratio Rank: 26

DFCFX

DFCFX Risk / Return Rank: 66
DFCFX Sharpe Ratio Rank: 75
DFCFX Sortino Ratio Rank: 46
DFCFX Omega Ratio Rank: 99
DFCFX Calmar Ratio Rank: 59
DFCFX Martin Ratio Rank: 52

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.

CPPAX vs. DFCFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Preservation Portfolio (CPPAX) and DFA Two-Year Fixed Income Portfolio (DFCFX). 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.

	CPPAX	DFCFX	Difference
Sharpe ratio: Return per unit of total volatility	1.56	2.50	-0.94
Sortino ratio: Return per unit of downside risk	2.37	2.88	-0.51
Omega ratio: Gain probability vs. loss probability	1.34	3.70	-2.37
Calmar ratio: Return relative to maximum drawdown	1.92	2.94	-1.02
Martin ratio: Return relative to average drawdown	6.22	10.64	-4.42
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CPPAX vs. DFCFX - Sharpe Ratio Comparison

The current CPPAX Sharpe Ratio is 1.56, which is lower than the DFCFX Sharpe Ratio of 2.50. The chart below compares the historical Sharpe Ratios of CPPAX and DFCFX, 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

	CPPAX	DFCFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.56	2.50	-0.94
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.42	0.87	-0.45
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.68	0.80	-0.12
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	1.35	-0.70

Drawdowns

CPPAX vs. DFCFX - Drawdown Comparison

The maximum CPPAX drawdown since its inception was -8.59%, which is greater than DFCFX's maximum drawdown of -4.27%. Use the drawdown chart below to compare losses from any high point for CPPAX and DFCFX.

Drawdown Indicators

	CPPAX	DFCFX	Difference
Max Drawdown Largest peak-to-trough decline	-8.59%	-4.27%	-4.32%
Max Drawdown (1Y) Largest decline over 1 year	-1.67%	-1.03%	-0.64%
Max Drawdown (3Y) Largest decline over 3 years	-1.67%	-1.33%	-0.34%
Max Drawdown (5Y) Largest decline over 5 years	-8.57%	-4.27%	-4.30%
Max Drawdown (10Y) Largest decline over 10 years	-8.59%	-4.27%	-4.32%
Current Drawdown Current decline from peak	-0.96%	0.00%	-0.96%
Average Drawdown Average peak-to-trough decline	-1.31%	-0.26%	-1.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.51%	0.28%	+0.23%

Volatility

CPPAX vs. DFCFX - Volatility Comparison

American Funds Preservation Portfolio (CPPAX) has a higher volatility of 0.59% compared to DFA Two-Year Fixed Income Portfolio (DFCFX) at 0.17%. This indicates that CPPAX's price experiences larger fluctuations and is considered to be riskier than DFCFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPPAX	DFCFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.59%	0.17%	+0.42%
Volatility (6M) Calculated over the trailing 6-month period	1.39%	0.40%	+0.99%
Volatility (1Y) Calculated over the trailing 1-year period	2.06%	1.21%	+0.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.06%	4.39%	-1.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.48%	3.13%	-0.65%

CPPAX vs. DFCFX - Expense Ratio Comparison

CPPAX has a 0.61% expense ratio, which is higher than DFCFX's 0.21% expense ratio.

Dividends

CPPAX vs. DFCFX - Dividend Comparison

CPPAX's dividend yield for the trailing twelve months is around 3.49%, more than DFCFX's 2.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CPPAX American Funds Preservation Portfolio	3.49%	3.56%	4.03%	3.24%	2.02%	0.95%	2.32%	1.91%	1.59%	1.06%	1.26%	1.11%
DFCFX DFA Two-Year Fixed Income Portfolio	2.93%	2.16%	4.90%	3.43%	1.32%	8.29%	0.67%	2.22%	1.87%	1.22%	0.79%	0.53%

Frequently Asked Questions

Can I hold both CPPAX and DFCFX in my portfolio?

CPPAX and DFCFX have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPPAX or DFCFX?

CPPAX has higher volatility (0.59%) compared to DFCFX (0.17%). In terms of maximum drawdown, CPPAX dropped -8.59% vs DFCFX's -4.27%.

Which has better risk-adjusted returns?

DFCFX currently has the higher Sharpe Ratio (2.50 vs 1.56), 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.