DFIGX vs. VEDTX

Last updated Jun 26, 2026

DFIGX (DFA Intermediate Government Fixed Income Portfolio) and VEDTX (Vanguard Extended Duration Treasury Index Fund) are both Government Bonds funds. Over the past 10 years, DFIGX returned 0.80%/yr vs -3.27%/yr for VEDTX. Their correlation of 0.84 suggests significant overlap in exposure. DFIGX charges 0.11%/yr vs 0.06%/yr for VEDTX.

Performance

DFIGX vs. VEDTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in DFA Intermediate Government Fixed Income Portfolio (DFIGX) and Vanguard Extended Duration Treasury Index Fund (VEDTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DFIGX achieves a 0.70% return, which is significantly lower than VEDTX's 2.84% return. Over the past 10 years, DFIGX has outperformed VEDTX with an annualized return of 0.80%, while VEDTX has yielded a comparatively lower -3.27% annualized return.

DFIGX

• 1D: 0.54%
• 1M: 0.81%
• YTD: 0.70%
• 6M: 0.61%
• 1Y: 2.96%
• 3Y*: 3.20%
• 5Y*: -0.43%
• 10Y*: 0.80%

VEDTX

• 1D: 2.10%
• 1M: 5.11%
• YTD: 2.84%
• 6M: 1.60%
• 1Y: 4.89%
• 3Y*: -4.66%
• 5Y*: -9.78%
• 10Y*: -3.27%

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

DFIGX vs. VEDTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
DFIGX DFA Intermediate Government Fixed Income Portfolio	0.70%	6.33%	0.47%	4.58%	-13.12%	-3.14%	9.10%	7.22%	0.92%	1.65%
VEDTX Vanguard Extended Duration Treasury Index Fund	2.84%	1.34%	-13.35%	2.15%	-39.40%	-6.52%	24.20%	19.16%	-3.50%	12.69%

Correlation

The correlation between DFIGX and VEDTX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since Nov 20, 2007	0.84

The correlation between DFIGX and VEDTX has been stable across timeframes, ranging from 0.83 to 0.88 - a consistent structural relationship.

Return for Risk

DFIGX vs. VEDTX — Risk / Return Rank

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

DFIGX

DFIGX Risk / Return Rank: 12
DFIGX Sharpe Ratio Rank: 13
DFIGX Sortino Ratio Rank: 13
DFIGX Omega Ratio Rank: 11
DFIGX Calmar Ratio Rank: 13
DFIGX Martin Ratio Rank: 12

VEDTX

VEDTX Risk / Return Rank: 6
VEDTX Sharpe Ratio Rank: 6
VEDTX Sortino Ratio Rank: 6
VEDTX Omega Ratio Rank: 6
VEDTX Calmar Ratio Rank: 6
VEDTX Martin Ratio Rank: 6

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.

DFIGX vs. VEDTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for DFA Intermediate Government Fixed Income Portfolio (DFIGX) and Vanguard Extended Duration Treasury Index Fund (VEDTX). 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.

	DFIGX	VEDTX	Difference
Sharpe ratio: Return per unit of total volatility	0.77	0.35	+0.42
Sortino ratio: Return per unit of downside risk	1.17	0.61	+0.56
Omega ratio: Gain probability vs. loss probability	1.13	1.07	+0.07
Calmar ratio: Return relative to maximum drawdown	0.97	0.41	+0.56
Martin ratio: Return relative to average drawdown	2.62	0.91	+1.71

DFIGX vs. VEDTX - Sharpe Ratio Comparison

The current DFIGX Sharpe Ratio is 0.77, which is higher than the VEDTX Sharpe Ratio of 0.35. The chart below compares the historical Sharpe Ratios of DFIGX and VEDTX, 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

DFIGX vs. VEDTX - Drawdown Comparison

The maximum DFIGX drawdown since its inception was -19.56%, smaller than the maximum VEDTX drawdown of -60.00%. Use the drawdown chart below to compare losses from any high point for DFIGX and VEDTX.

Drawdown Indicators

	DFIGX	VEDTX	Difference
Max Drawdown Largest peak-to-trough decline	-19.56%	-60.00%	+40.44%
Max Drawdown (1Y) Largest decline over 1 year	-3.08%	-12.41%	+9.33%
Max Drawdown (3Y) Largest decline over 3 years	-5.47%	-26.95%	+21.48%
Max Drawdown (5Y) Largest decline over 5 years	-17.62%	-55.15%	+37.53%
Max Drawdown (10Y) Largest decline over 10 years	-19.56%	-60.00%	+40.44%
Current Drawdown Current decline from peak	-6.73%	-52.72%	+45.99%
Average Drawdown Average peak-to-trough decline	-3.12%	-23.58%	+20.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.14%	5.56%	-4.42%

Volatility

DFIGX vs. VEDTX - Volatility Comparison

The current volatility for DFA Intermediate Government Fixed Income Portfolio (DFIGX) is 1.14%, while Vanguard Extended Duration Treasury Index Fund (VEDTX) has a volatility of 3.78%. This indicates that DFIGX experiences smaller price fluctuations and is considered to be less risky than VEDTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DFIGX	VEDTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.14%	3.78%	-2.64%
Volatility (6M) Calculated over the trailing 6-month period	2.78%	10.10%	-7.32%
Volatility (1Y) Calculated over the trailing 1-year period	3.90%	14.49%	-10.59%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.22%	21.85%	-15.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.35%	20.10%	-14.75%

DFIGX vs. VEDTX - Expense Ratio Comparison

DFIGX has a 0.11% expense ratio, which is higher than VEDTX's 0.06% 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

DFIGX vs. VEDTX - Dividend Comparison

DFIGX's dividend yield for the trailing twelve months is around 2.28%, less than VEDTX's 4.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFIGX DFA Intermediate Government Fixed Income Portfolio	2.28%	2.22%	2.82%	2.33%	1.78%	2.36%	4.14%	2.16%	2.19%	1.57%	1.66%	2.49%
VEDTX Vanguard Extended Duration Treasury Index Fund	4.81%	4.94%	4.68%	3.55%	3.30%	1.96%	5.56%	3.53%	2.94%	2.23%	5.34%	4.28%

Frequently Asked Questions

Can I hold both DFIGX and VEDTX in my portfolio?

DFIGX and VEDTX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DFIGX or VEDTX?

VEDTX has higher volatility (3.78%) compared to DFIGX (1.14%). In terms of maximum drawdown, DFIGX dropped -19.56% vs VEDTX's -60.00%.

Which has better risk-adjusted returns?

DFIGX currently has the higher Sharpe Ratio (0.77 vs 0.35), 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.