VBMFX vs. DFIHX

Last updated Jun 4, 2026

VBMFX (Vanguard Total Bond Market Index Fund) and DFIHX (DFA One Year Fixed Income Portfolio) are both mutual funds - VBMFX is a Intermediate Core Bond fund managed by Vanguard, while DFIHX is a Ultrashort Bond fund managed by Dimensional. Over the past 10 years, VBMFX returned 1.46%/yr vs 1.98%/yr for DFIHX. At a 0.30 correlation, their price movements are largely independent. VBMFX charges 0.15%/yr vs 0.13%/yr for DFIHX.

Performance

VBMFX vs. DFIHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total Bond Market Index Fund (VBMFX) and DFA One Year Fixed Income Portfolio (DFIHX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBMFX achieves a 0.38% return, which is significantly lower than DFIHX's 1.52% return. Over the past 10 years, VBMFX has underperformed DFIHX with an annualized return of 1.46%, while DFIHX has yielded a comparatively higher 1.98% annualized return.

VBMFX

• 1D: 0.00%
• 1M: 0.54%
• YTD: 0.38%
• 6M: 0.29%
• 1Y: 5.22%
• 3Y*: 3.93%
• 5Y*: 0.10%
• 10Y*: 1.46%

DFIHX

• 1D: 0.00%
• 1M: 0.30%
• YTD: 1.52%
• 6M: 1.83%
• 1Y: 3.65%
• 3Y*: 4.46%
• 5Y*: 2.76%
• 10Y*: 1.98%

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

VBMFX vs. DFIHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBMFX Vanguard Total Bond Market Index Fund	0.38%	7.05%	1.15%	5.62%	-13.25%	-2.04%	7.63%	8.61%	-0.34%	3.45%
DFIHX DFA One Year Fixed Income Portfolio	1.52%	3.41%	5.41%	4.98%	-1.19%	-0.19%	0.62%	2.44%	1.87%	0.94%

Correlation

The correlation between VBMFX and DFIHX is 0.09, 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	0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.02
Correlation (5Y) Calculated over the trailing 5-year period	0.28
Correlation (10Y) Calculated over the trailing 10-year period	0.25
Correlation (All Time) Calculated using the full available price history since Dec 12, 1986	0.30

Over the past year, the correlation between VBMFX and DFIHX has dropped to 0.09 - well below their long-term average of 0.30, suggesting their price drivers have been diverging.

Return for Risk

VBMFX vs. DFIHX — Risk / Return Rank

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

VBMFX

VBMFX Risk / Return Rank: 22
VBMFX Sharpe Ratio Rank: 22
VBMFX Sortino Ratio Rank: 23
VBMFX Omega Ratio Rank: 21
VBMFX Calmar Ratio Rank: 23
VBMFX Martin Ratio Rank: 20

DFIHX

DFIHX Risk / Return Rank: 99
DFIHX Sharpe Ratio Rank: 99
DFIHX Sortino Ratio Rank: 99
DFIHX Omega Ratio Rank: 100
DFIHX Calmar Ratio Rank: 98
DFIHX Martin Ratio Rank: 99

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.

VBMFX vs. DFIHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Bond Market Index Fund (VBMFX) and DFA One Year Fixed Income Portfolio (DFIHX). 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.

	VBMFX	DFIHX	Difference
Sharpe ratio Return per unit of total volatility	1.33	5.17	-3.84
Sortino ratio Return per unit of downside risk	2.00	8.94	-6.95
Omega ratio Gain probability vs. loss probability	1.24	7.53	-6.29
Calmar ratio Return relative to maximum drawdown	1.80	9.49	-7.69
Martin ratio Return relative to average drawdown	5.43	57.84	-52.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VBMFX vs. DFIHX - Sharpe Ratio Comparison

The current VBMFX Sharpe Ratio is 1.33, which is lower than the DFIHX Sharpe Ratio of 5.17. The chart below compares the historical Sharpe Ratios of VBMFX and DFIHX, 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

	VBMFX	DFIHX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.33	5.17	-3.84
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.02	2.78	-2.76
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.29	2.50	-2.21
Sharpe Ratio (All Time) Calculated using the full available price history	0.96	1.52	-0.56

Drawdowns

VBMFX vs. DFIHX - Drawdown Comparison

The maximum VBMFX drawdown since its inception was -19.08%, which is greater than DFIHX's maximum drawdown of -2.53%. Use the drawdown chart below to compare losses from any high point for VBMFX and DFIHX.

Drawdown Indicators

	VBMFX	DFIHX	Difference
Max Drawdown Largest peak-to-trough decline	-19.08%	-2.53%	-16.55%
Max Drawdown (1Y) Largest decline over 1 year	-2.91%	-0.39%	-2.52%
Max Drawdown (3Y) Largest decline over 3 years	-6.02%	-0.49%	-5.53%
Max Drawdown (5Y) Largest decline over 5 years	-18.24%	-2.26%	-15.98%
Max Drawdown (10Y) Largest decline over 10 years	-19.08%	-2.26%	-16.82%
Current Drawdown Current decline from peak	-2.90%	0.00%	-2.90%
Average Drawdown Average peak-to-trough decline	-2.70%	-0.15%	-2.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.96%	0.06%	+0.90%

Volatility

VBMFX vs. DFIHX - Volatility Comparison

Vanguard Total Bond Market Index Fund (VBMFX) has a higher volatility of 1.37% compared to DFA One Year Fixed Income Portfolio (DFIHX) at 0.16%. This indicates that VBMFX's price experiences larger fluctuations and is considered to be riskier than DFIHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBMFX	DFIHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.37%	0.16%	+1.21%
Volatility (6M) Calculated over the trailing 6-month period	2.79%	0.43%	+2.36%
Volatility (1Y) Calculated over the trailing 1-year period	3.96%	0.72%	+3.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.01%	1.00%	+5.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.98%	0.80%	+4.18%

VBMFX vs. DFIHX - Expense Ratio Comparison

VBMFX has a 0.15% expense ratio, which is higher than DFIHX's 0.13% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VBMFX vs. DFIHX - Dividend Comparison

VBMFX's dividend yield for the trailing twelve months is around 3.87%, more than DFIHX's 3.58% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFIHX DFA One Year Fixed Income Portfolio	3.58%	3.26%	4.99%	3.37%	1.07%	0.00%	0.62%	2.12%	1.85%	1.13%	0.66%	0.51%
VBMFX Vanguard Total Bond Market Index Fund	3.87%	3.76%	3.57%	2.99%	2.49%	1.72%	2.31%	2.63%	2.47%	2.45%	2.43%	2.71%

Frequently Asked Questions

Can I hold both VBMFX and DFIHX in my portfolio?

VBMFX and DFIHX have a correlation of 0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VBMFX or DFIHX?

VBMFX has higher volatility (1.37%) compared to DFIHX (0.16%). In terms of maximum drawdown, VBMFX dropped -19.08% vs DFIHX's -2.53%.

Which has better risk-adjusted returns?

DFIHX currently has the higher Sharpe Ratio (5.17 vs 1.33), 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.