CDJAX vs. GFFFX

Last updated Jun 6, 2026

CDJAX (American Funds College 2039 Fund) and GFFFX (American Funds The Growth Fund of America) are both mutual funds - CDJAX is a Diversified Portfolio fund managed by American Funds, while GFFFX is a Large Cap Growth Equities fund managed by American Funds. Over the past 5 years, CDJAX returned 8.63%/yr vs 12.35%/yr for GFFFX. With a 0.96 correlation, they move nearly in lockstep. CDJAX charges 0.48%/yr vs 0.40%/yr for GFFFX.

Performance

CDJAX vs. GFFFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds College 2039 Fund (CDJAX) and American Funds The Growth Fund of America (GFFFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CDJAX achieves a 8.84% return, which is significantly lower than GFFFX's 9.49% return.

CDJAX

• 1D: 0.14%
• 1M: 1.46%
• YTD: 8.84%
• 6M: 9.27%
• 1Y: 22.10%
• 3Y*: 18.40%
• 5Y*: 8.63%
• 10Y*: —

GFFFX

• 1D: 0.17%
• 1M: 3.32%
• YTD: 9.49%
• 6M: 8.82%
• 1Y: 25.60%
• 3Y*: 25.24%
• 5Y*: 12.35%
• 10Y*: 16.07%

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

CDJAX vs. GFFFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
CDJAX American Funds College 2039 Fund	8.84%	18.87%	15.33%	21.97%	-20.70%	6.97%
GFFFX American Funds The Growth Fund of America	9.49%	19.96%	28.28%	37.51%	-30.61%	14.03%

Correlation

The correlation between CDJAX and GFFFX is 0.95, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (All Time) Calculated using the full available price history since May 24, 2021	0.96

The correlation between CDJAX and GFFFX has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.

Return for Risk

CDJAX vs. GFFFX — Risk / Return Rank

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

CDJAX

CDJAX Risk / Return Rank: 55
CDJAX Sharpe Ratio Rank: 54
CDJAX Sortino Ratio Rank: 54
CDJAX Omega Ratio Rank: 54
CDJAX Calmar Ratio Rank: 51
CDJAX Martin Ratio Rank: 63

GFFFX

GFFFX Risk / Return Rank: 33
GFFFX Sharpe Ratio Rank: 36
GFFFX Sortino Ratio Rank: 33
GFFFX Omega Ratio Rank: 35
GFFFX Calmar Ratio Rank: 27
GFFFX Martin Ratio Rank: 33

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.

CDJAX vs. GFFFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds College 2039 Fund (CDJAX) and American Funds The Growth Fund of America (GFFFX). 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.

	CDJAX	GFFFX	Difference
Sharpe ratio: Return per unit of total volatility	2.11	1.67	+0.45
Sortino ratio: Return per unit of downside risk	2.99	2.30	+0.69
Omega ratio: Gain probability vs. loss probability	1.39	1.30	+0.09
Calmar ratio: Return relative to maximum drawdown	2.63	1.84	+0.79
Martin ratio: Return relative to average drawdown	11.94	7.19	+4.75
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CDJAX vs. GFFFX - Sharpe Ratio Comparison

The current CDJAX Sharpe Ratio is 2.11, which is comparable to the GFFFX Sharpe Ratio of 1.67. The chart below compares the historical Sharpe Ratios of CDJAX and GFFFX, 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

	CDJAX	GFFFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.11	1.67	+0.45
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.62	0.61	0.00
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.82	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.81	-0.16

Drawdowns

CDJAX vs. GFFFX - Drawdown Comparison

The maximum CDJAX drawdown since its inception was -28.37%, smaller than the maximum GFFFX drawdown of -36.26%. Use the drawdown chart below to compare losses from any high point for CDJAX and GFFFX.

Drawdown Indicators

	CDJAX	GFFFX	Difference
Max Drawdown Largest peak-to-trough decline	-28.37%	-36.26%	+7.89%
Max Drawdown (1Y) Largest decline over 1 year	-8.44%	-13.74%	+5.30%
Max Drawdown (3Y) Largest decline over 3 years	-14.35%	-21.55%	+7.20%
Max Drawdown (5Y) Largest decline over 5 years	-28.37%	-36.26%	+7.89%
Max Drawdown (10Y) Largest decline over 10 years	—	-36.26%	—
Current Drawdown Current decline from peak	-0.43%	-0.95%	+0.52%
Average Drawdown Average peak-to-trough decline	-7.34%	-5.57%	-1.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.86%	3.51%	-1.65%

Volatility

CDJAX vs. GFFFX - Volatility Comparison

The current volatility for American Funds College 2039 Fund (CDJAX) is 3.16%, while American Funds The Growth Fund of America (GFFFX) has a volatility of 3.81%. This indicates that CDJAX experiences smaller price fluctuations and is considered to be less risky than GFFFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CDJAX	GFFFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.16%	3.81%	-0.65%
Volatility (6M) Calculated over the trailing 6-month period	8.32%	11.66%	-3.34%
Volatility (1Y) Calculated over the trailing 1-year period	10.50%	15.17%	-4.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.05%	20.24%	-6.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.01%	19.68%	-5.67%

CDJAX vs. GFFFX - Expense Ratio Comparison

CDJAX has a 0.48% expense ratio, which is higher than GFFFX's 0.40% expense ratio.

Dividends

CDJAX vs. GFFFX - Dividend Comparison

CDJAX's dividend yield for the trailing twelve months is around 5.64%, less than GFFFX's 10.00% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CDJAX American Funds College 2039 Fund	5.64%	6.14%	3.12%	1.63%	2.53%	0.45%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
GFFFX American Funds The Growth Fund of America	10.00%	10.95%	9.23%	7.64%	4.32%	8.42%	4.51%	7.38%	12.29%	7.27%	6.87%	9.13%

Frequently Asked Questions

Can I hold both CDJAX and GFFFX in my portfolio?

With a correlation of 0.95, CDJAX and GFFFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, CDJAX or GFFFX?

GFFFX has higher volatility (3.81%) compared to CDJAX (3.16%). In terms of maximum drawdown, CDJAX dropped -28.37% vs GFFFX's -36.26%.

Which has better risk-adjusted returns?

CDJAX currently has the higher Sharpe Ratio (2.11 vs 1.67), 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.