VBINX vs. AABTX

Last updated Jun 4, 2026

VBINX (Vanguard Balanced Index Fund) and AABTX (American Funds 2015 Target Date Retirement Fund) are both mutual funds - VBINX is a Diversified Portfolio fund managed by Vanguard, while AABTX is a Target Retirement Date fund managed by American Funds. Over the past 10 years, VBINX returned 9.97%/yr vs 6.61%/yr for AABTX. Their correlation of 0.93 suggests significant overlap in exposure. VBINX charges 0.18%/yr vs 0.33%/yr for AABTX.

Performance

VBINX vs. AABTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Balanced Index Fund (VBINX) and American Funds 2015 Target Date Retirement Fund (AABTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBINX achieves a 7.32% return, which is significantly higher than AABTX's 4.44% return. Over the past 10 years, VBINX has outperformed AABTX with an annualized return of 9.97%, while AABTX has yielded a comparatively lower 6.61% annualized return.

VBINX

• 1D: 0.15%
• 1M: 3.69%
• YTD: 7.32%
• 6M: 7.20%
• 1Y: 19.24%
• 3Y*: 15.97%
• 5Y*: 8.48%
• 10Y*: 9.97%

AABTX

• 1D: 0.22%
• 1M: 1.59%
• YTD: 4.44%
• 6M: 4.83%
• 1Y: 12.60%
• 3Y*: 10.62%
• 5Y*: 5.33%
• 10Y*: 6.61%

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

VBINX vs. AABTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBINX Vanguard Balanced Index Fund	7.32%	13.46%	17.63%	17.41%	-16.98%	13.62%	16.26%	21.67%	-2.97%	13.75%
AABTX American Funds 2015 Target Date Retirement Fund	4.44%	13.11%	8.07%	9.23%	-10.56%	9.95%	9.63%	14.47%	-2.98%	10.84%

Correlation

The correlation between VBINX and AABTX is 0.88, 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	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Feb 5, 2007	0.93

The correlation between VBINX and AABTX has been stable across timeframes, ranging from 0.88 to 0.93 - a consistent structural relationship.

Return for Risk

VBINX vs. AABTX — Risk / Return Rank

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

VBINX

VBINX Risk / Return Rank: 75
VBINX Sharpe Ratio Rank: 74
VBINX Sortino Ratio Rank: 73
VBINX Omega Ratio Rank: 69
VBINX Calmar Ratio Rank: 75
VBINX Martin Ratio Rank: 82

AABTX

AABTX Risk / Return Rank: 67
AABTX Sharpe Ratio Rank: 75
AABTX Sortino Ratio Rank: 76
AABTX Omega Ratio Rank: 75
AABTX Calmar Ratio Rank: 51
AABTX Martin Ratio Rank: 59

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.

VBINX vs. AABTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Balanced Index Fund (VBINX) and American Funds 2015 Target Date Retirement Fund (AABTX). 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.

	VBINX	AABTX	Difference
Sharpe ratio: Return per unit of total volatility	2.50	2.51	0.00
Sortino ratio: Return per unit of downside risk	3.57	3.64	-0.07
Omega ratio: Gain probability vs. loss probability	1.46	1.49	-0.03
Calmar ratio: Return relative to maximum drawdown	3.39	2.71	+0.68
Martin ratio: Return relative to average drawdown	15.44	11.82	+3.63
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VBINX vs. AABTX - Sharpe Ratio Comparison

The current VBINX Sharpe Ratio is 2.50, which is comparable to the AABTX Sharpe Ratio of 2.51. The chart below compares the historical Sharpe Ratios of VBINX and AABTX, 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

	VBINX	AABTX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.50	2.51	0.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.77	0.77	0.00
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.89	0.91	-0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.79	0.55	+0.24

Drawdowns

VBINX vs. AABTX - Drawdown Comparison

The maximum VBINX drawdown since its inception was -35.97%, smaller than the maximum AABTX drawdown of -42.44%. Use the drawdown chart below to compare losses from any high point for VBINX and AABTX.

Drawdown Indicators

	VBINX	AABTX	Difference
Max Drawdown Largest peak-to-trough decline	-35.97%	-42.44%	+6.47%
Max Drawdown (1Y) Largest decline over 1 year	-5.84%	-4.74%	-1.10%
Max Drawdown (3Y) Largest decline over 3 years	-11.60%	-5.88%	-5.72%
Max Drawdown (5Y) Largest decline over 5 years	-21.61%	-16.21%	-5.40%
Max Drawdown (10Y) Largest decline over 10 years	-22.78%	-16.58%	-6.20%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-4.14%	-4.75%	+0.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.28%	1.08%	+0.20%

Volatility

VBINX vs. AABTX - Volatility Comparison

Vanguard Balanced Index Fund (VBINX) has a higher volatility of 2.26% compared to American Funds 2015 Target Date Retirement Fund (AABTX) at 1.68%. This indicates that VBINX's price experiences larger fluctuations and is considered to be riskier than AABTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBINX	AABTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.26%	1.68%	+0.58%
Volatility (6M) Calculated over the trailing 6-month period	6.13%	4.14%	+1.99%
Volatility (1Y) Calculated over the trailing 1-year period	7.91%	5.12%	+2.79%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.10%	6.94%	+4.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.23%	7.27%	+3.96%

VBINX vs. AABTX - Expense Ratio Comparison

VBINX has a 0.18% expense ratio, which is lower than AABTX's 0.33% expense ratio.

Dividends

VBINX vs. AABTX - Dividend Comparison

VBINX's dividend yield for the trailing twelve months is around 5.11%, less than AABTX's 7.24% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AABTX American Funds 2015 Target Date Retirement Fund	7.24%	7.57%	5.27%	3.52%	3.72%	4.95%	4.07%	4.05%	4.28%	2.71%	3.02%	5.56%
VBINX Vanguard Balanced Index Fund	5.11%	5.89%	7.88%	4.25%	2.71%	2.71%	2.54%	2.19%	2.20%	1.83%	1.97%	1.95%

Frequently Asked Questions

Can I hold both VBINX and AABTX in my portfolio?

VBINX and AABTX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VBINX or AABTX?

VBINX has higher volatility (2.26%) compared to AABTX (1.68%). In terms of maximum drawdown, VBINX dropped -35.97% vs AABTX's -42.44%.

Which has better risk-adjusted returns?

AABTX currently has the higher Sharpe Ratio (2.51 vs 2.50), 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.