CDJAX vs. TIBIX

Last updated Jun 6, 2026

CDJAX (American Funds College 2039 Fund) and TIBIX (Thornburg Investment Income Builder Fund Class I) are both Diversified Portfolio funds. Over the past 5 years, CDJAX returned 8.63%/yr vs 16.23%/yr for TIBIX. A 0.74 correlation means they provide meaningful diversification when combined. CDJAX charges 0.48%/yr vs 0.93%/yr for TIBIX.

Performance

CDJAX vs. TIBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds College 2039 Fund (CDJAX) and Thornburg Investment Income Builder Fund Class I (TIBIX). 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 TIBIX's 17.02% return.

CDJAX

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

TIBIX

• 1D: -0.57%
• 1M: 0.31%
• YTD: 17.02%
• 6M: 20.55%
• 1Y: 38.02%
• 3Y*: 26.56%
• 5Y*: 16.23%
• 10Y*: 12.59%

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

CDJAX vs. TIBIX - 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%
TIBIX Thornburg Investment Income Builder Fund Class I	17.02%	37.01%	13.48%	18.28%	-7.69%	7.57%

Correlation

The correlation between CDJAX and TIBIX is 0.60, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.60
Correlation (3Y) Calculated over the trailing 3-year period	0.68
Correlation (5Y) Calculated over the trailing 5-year period	0.74
Correlation (All Time) Calculated using the full available price history since May 24, 2021	0.74

The correlation between CDJAX and TIBIX shifts across timeframes, from 0.60 (1 year) to 0.74 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

CDJAX vs. TIBIX — 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

TIBIX

TIBIX Risk / Return Rank: 98
TIBIX Sharpe Ratio Rank: 99
TIBIX Sortino Ratio Rank: 98
TIBIX Omega Ratio Rank: 97
TIBIX Calmar Ratio Rank: 97
TIBIX Martin Ratio Rank: 97

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. TIBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds College 2039 Fund (CDJAX) and Thornburg Investment Income Builder Fund Class I (TIBIX). 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	TIBIX	Difference
Sharpe ratio: Return per unit of total volatility	2.11	4.54	-2.43
Sortino ratio: Return per unit of downside risk	2.99	6.55	-3.55
Omega ratio: Gain probability vs. loss probability	1.39	1.91	-0.51
Calmar ratio: Return relative to maximum drawdown	2.63	7.15	-4.52
Martin ratio: Return relative to average drawdown	11.94	27.88	-15.95
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. TIBIX - Sharpe Ratio Comparison

The current CDJAX Sharpe Ratio is 2.11, which is lower than the TIBIX Sharpe Ratio of 4.54. The chart below compares the historical Sharpe Ratios of CDJAX and TIBIX, 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	TIBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.11	4.54	-2.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.62	1.46	-0.84
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.94	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.76	-0.12

Drawdowns

CDJAX vs. TIBIX - Drawdown Comparison

The maximum CDJAX drawdown since its inception was -28.37%, smaller than the maximum TIBIX drawdown of -48.88%. Use the drawdown chart below to compare losses from any high point for CDJAX and TIBIX.

Drawdown Indicators

	CDJAX	TIBIX	Difference
Max Drawdown Largest peak-to-trough decline	-28.37%	-48.88%	+20.51%
Max Drawdown (1Y) Largest decline over 1 year	-8.44%	-5.39%	-3.05%
Max Drawdown (3Y) Largest decline over 3 years	-14.35%	-9.23%	-5.12%
Max Drawdown (5Y) Largest decline over 5 years	-28.37%	-20.79%	-7.58%
Max Drawdown (10Y) Largest decline over 10 years	—	-34.85%	—
Current Drawdown Current decline from peak	-0.43%	-0.80%	+0.37%
Average Drawdown Average peak-to-trough decline	-7.34%	-5.96%	-1.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.86%	1.38%	+0.48%

Volatility

CDJAX vs. TIBIX - Volatility Comparison

American Funds College 2039 Fund (CDJAX) and Thornburg Investment Income Builder Fund Class I (TIBIX) have volatilities of 3.16% and 3.12%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CDJAX	TIBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.16%	3.12%	+0.04%
Volatility (6M) Calculated over the trailing 6-month period	8.32%	6.99%	+1.33%
Volatility (1Y) Calculated over the trailing 1-year period	10.50%	8.49%	+2.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.05%	11.16%	+2.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.01%	13.50%	+0.51%

CDJAX vs. TIBIX - Expense Ratio Comparison

CDJAX has a 0.48% expense ratio, which is lower than TIBIX's 0.93% expense ratio.

Dividends

CDJAX vs. TIBIX - Dividend Comparison

CDJAX's dividend yield for the trailing twelve months is around 5.64%, more than TIBIX's 5.07% 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%
TIBIX Thornburg Investment Income Builder Fund Class I	5.07%	5.83%	5.67%	4.89%	5.89%	5.33%	4.31%	4.46%	4.77%	4.52%	4.14%	4.66%

Frequently Asked Questions

Can I hold both CDJAX and TIBIX in my portfolio?

CDJAX and TIBIX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CDJAX or TIBIX?

CDJAX has higher volatility (3.16%) compared to TIBIX (3.12%). In terms of maximum drawdown, CDJAX dropped -28.37% vs TIBIX's -48.88%.

Which has better risk-adjusted returns?

TIBIX currently has the higher Sharpe Ratio (4.54 vs 2.11), 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.