RGBFX vs. TIBAX

Last updated Jun 23, 2026

RGBFX (American Funds Global Balanced Fund Class R5) and TIBAX (Thornburg Investment Income Builder Fund) are both Global Allocation funds. Over the past 10 years, RGBFX returned 7.24%/yr vs 12.54%/yr for TIBAX. Their correlation of 0.83 suggests significant overlap in exposure. RGBFX charges 0.53%/yr vs 1.14%/yr for TIBAX.

Performance

RGBFX vs. TIBAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds Global Balanced Fund Class R5 (RGBFX) and Thornburg Investment Income Builder Fund (TIBAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RGBFX achieves a 6.00% return, which is significantly lower than TIBAX's 17.56% return. Over the past 10 years, RGBFX has underperformed TIBAX with an annualized return of 7.24%, while TIBAX has yielded a comparatively higher 12.54% annualized return.

RGBFX

• 1D: 0.40%
• 1M: 0.28%
• YTD: 6.00%
• 6M: 6.47%
• 1Y: 16.37%
• 3Y*: 12.01%
• 5Y*: 6.33%
• 10Y*: 7.24%

TIBAX

• 1D: 0.34%
• 1M: 0.61%
• YTD: 17.56%
• 6M: 19.01%
• 1Y: 37.19%
• 3Y*: 25.13%
• 5Y*: 16.45%
• 10Y*: 12.54%

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

RGBFX vs. TIBAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RGBFX American Funds Global Balanced Fund Class R5	6.00%	17.44%	6.86%	14.06%	-14.01%	9.50%	10.80%	17.55%	-5.86%	14.33%
TIBAX Thornburg Investment Income Builder Fund	17.56%	36.62%	13.23%	18.01%	-7.95%	20.08%	-0.67%	17.72%	-4.54%	14.83%

Correlation

The correlation between RGBFX and TIBAX is 0.69, 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	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (10Y) Calculated over the trailing 10-year period	0.81
Correlation (All Time) Calculated using the full available price history since Jan 3, 2012	0.83

The correlation between RGBFX and TIBAX shifts across timeframes, from 0.69 (1 year) to 0.83 (all time), reflecting how their relationship changes across market environments.

Return for Risk

RGBFX vs. TIBAX — Risk / Return Rank

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

RGBFX

RGBFX Risk / Return Rank: 48
RGBFX Sharpe Ratio Rank: 47
RGBFX Sortino Ratio Rank: 47
RGBFX Omega Ratio Rank: 50
RGBFX Calmar Ratio Rank: 43
RGBFX Martin Ratio Rank: 54

TIBAX

TIBAX Risk / Return Rank: 98
TIBAX Sharpe Ratio Rank: 99
TIBAX Sortino Ratio Rank: 98
TIBAX Omega Ratio Rank: 96
TIBAX Calmar Ratio Rank: 97
TIBAX Martin Ratio Rank: 98

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.

RGBFX vs. TIBAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Global Balanced Fund Class R5 (RGBFX) and Thornburg Investment Income Builder Fund (TIBAX). 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.

	RGBFX	TIBAX	Difference
Sharpe ratio: Return per unit of total volatility	1.87	4.25	-2.38
Sortino ratio: Return per unit of downside risk	2.66	6.02	-3.36
Omega ratio: Gain probability vs. loss probability	1.36	1.84	-0.49
Calmar ratio: Return relative to maximum drawdown	2.39	6.85	-4.46
Martin ratio: Return relative to average drawdown	10.25	26.19	-15.94

RGBFX vs. TIBAX - Sharpe Ratio Comparison

The current RGBFX Sharpe Ratio is 1.87, which is lower than the TIBAX Sharpe Ratio of 4.25. The chart below compares the historical Sharpe Ratios of RGBFX and TIBAX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

RGBFX vs. TIBAX - Drawdown Comparison

The maximum RGBFX drawdown since its inception was -23.31%, smaller than the maximum TIBAX drawdown of -49.12%. Use the drawdown chart below to compare losses from any high point for RGBFX and TIBAX.

Drawdown Indicators

	RGBFX	TIBAX	Difference
Max Drawdown Largest peak-to-trough decline	-23.31%	-49.12%	+25.81%
Max Drawdown (1Y) Largest decline over 1 year	-6.73%	-5.43%	-1.30%
Max Drawdown (3Y) Largest decline over 3 years	-8.76%	-9.20%	+0.44%
Max Drawdown (5Y) Largest decline over 5 years	-22.33%	-20.94%	-1.39%
Max Drawdown (10Y) Largest decline over 10 years	-23.31%	-34.85%	+11.54%
Current Drawdown Current decline from peak	-1.03%	-0.30%	-0.73%
Average Drawdown Average peak-to-trough decline	-3.39%	-5.98%	+2.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.57%	1.42%	+0.15%

Volatility

RGBFX vs. TIBAX - Volatility Comparison

American Funds Global Balanced Fund Class R5 (RGBFX) has a higher volatility of 3.22% compared to Thornburg Investment Income Builder Fund (TIBAX) at 2.89%. This indicates that RGBFX's price experiences larger fluctuations and is considered to be riskier than TIBAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RGBFX	TIBAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.22%	2.89%	+0.33%
Volatility (6M) Calculated over the trailing 6-month period	7.28%	7.31%	-0.03%
Volatility (1Y) Calculated over the trailing 1-year period	8.62%	8.75%	-0.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.98%	11.15%	-1.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.48%	13.46%	-2.98%

RGBFX vs. TIBAX - Expense Ratio Comparison

RGBFX has a 0.53% expense ratio, which is lower than TIBAX's 1.14% expense ratio.

Dividends

RGBFX vs. TIBAX - Dividend Comparison

RGBFX's dividend yield for the trailing twelve months is around 6.11%, more than TIBAX's 4.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RGBFX American Funds Global Balanced Fund Class R5	6.11%	6.59%	5.82%	1.88%	1.82%	6.32%	1.50%	2.13%	2.59%	3.42%	2.26%	3.54%
TIBAX Thornburg Investment Income Builder Fund	4.93%	5.64%	5.44%	4.67%	5.62%	5.10%	4.11%	4.23%	4.49%	4.22%	3.83%	4.31%

Frequently Asked Questions

Can I hold both RGBFX and TIBAX in my portfolio?

RGBFX and TIBAX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RGBFX or TIBAX?

RGBFX has higher volatility (3.22%) compared to TIBAX (2.89%). In terms of maximum drawdown, RGBFX dropped -23.31% vs TIBAX's -49.12%.

Which has better risk-adjusted returns?

TIBAX currently has the higher Sharpe Ratio (4.25 vs 1.87), 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.