SPTI vs. DFIGX

Last updated Aug 4, 2026

SPTI (SPDR Portfolio Intermediate Term Treasury ETF) and DFIGX (DFA Intermediate Government Fixed Income Portfolio) are both Government Bonds funds. Over the past 10 years, SPTI returned 1.26%/yr vs 0.63%/yr for DFIGX. Their correlation of 0.90 means they have usually moved in the same direction. SPTI charges 0.06%/yr vs 0.11%/yr for DFIGX.

Performance

SPTI vs. DFIGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR Portfolio Intermediate Term Treasury ETF (SPTI) and DFA Intermediate Government Fixed Income Portfolio (DFIGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPTI achieves a -0.61% return, which is significantly higher than DFIGX's -0.66% return. Over the past 10 years, SPTI has outperformed DFIGX with an annualized return of 1.26%, while DFIGX has yielded a comparatively lower 0.63% annualized return.

SPTI

• 1D: 0.16%
• 1M: -0.59%
• 6M: -0.45%
• YTD: -0.61%
• 1Y: 1.29%
• 3Y*: 3.69%
• 5Y*: -0.27%
• 10Y*: 1.26%
• ALL TIME*: 2.47%

DFIGX

• 1D: -0.27%
• 1M: -1.08%
• 6M: -0.58%
• YTD: -0.66%
• 1Y: 1.38%
• 3Y*: 3.16%
• 5Y*: -1.11%
• 10Y*: 0.63%
• ALL TIME*: 16.08%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
DFIGX DFA Intermediate Government Fixed Income Portfolio	$0.00	$0.00	$0.00
SPTI SPDR Portfolio Intermediate Term Treasury ETF	$54.93M	$53.13M	$68.33M

SPTI vs. DFIGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SPTI SPDR Portfolio Intermediate Term Treasury ETF	-0.61%	7.46%	1.32%	4.24%	-10.65%	-2.55%	7.70%	6.01%	2.27%	1.04%
DFIGX DFA Intermediate Government Fixed Income Portfolio	-0.66%	6.33%	0.47%	4.58%	-13.12%	-3.14%	9.10%	7.22%	0.92%	1.65%

Correlation

The correlation between SPTI and DFIGX is 0.95, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.95
Correlation (3Y) Balances recent behavior with more history.	0.96
Correlation (5Y) Shows whether the relationship held over a longer period.	0.97
Correlation (10Y) Provides a long-term view across more market conditions.	0.96
Correlation (All Time) Calculated using the full available price history since May 30, 2007	0.90

The correlation between SPTI and DFIGX has been stable across timeframes, ranging from 0.90 to 0.97 - a consistent structural relationship.

Return for Risk

SPTI vs. DFIGX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

SPTI

SPTI Risk / Return Rank: 18
SPTI Sharpe Ratio Rank: 20
SPTI Sortino Ratio Rank: 18
SPTI Omega Ratio Rank: 17
SPTI Calmar Ratio Rank: 19
SPTI Martin Ratio Rank: 18

DFIGX

DFIGX Risk / Return Rank: 13
DFIGX Sharpe Ratio Rank: 14
DFIGX Sortino Ratio Rank: 14
DFIGX Omega Ratio Rank: 13
DFIGX Calmar Ratio Rank: 13
DFIGX Martin Ratio Rank: 12

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

SPTI vs. DFIGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio Intermediate Term Treasury ETF (SPTI) and DFA Intermediate Government Fixed Income Portfolio (DFIGX). 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.

	SPTI	DFIGX	Difference
Sharpe ratio: Return per unit of total volatility	0.40	0.61	-0.21
Sortino ratio: Return per unit of downside risk	0.58	0.93	-0.34
Omega ratio: Gain probability vs. loss probability	1.07	1.11	-0.04
Calmar ratio: Return relative to maximum drawdown	0.46	0.75	-0.29
Martin ratio: Return relative to average drawdown	1.06	1.86	-0.79

SPTI vs. DFIGX - Sharpe Ratio Comparison

The current SPTI Sharpe Ratio is 0.40, which is lower than the DFIGX Sharpe Ratio of 0.61. The chart below compares the historical Sharpe Ratios of SPTI and DFIGX, 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

SPTI vs. DFIGX - Drawdown Comparison

The maximum SPTI drawdown since its inception was -16.12%, smaller than the maximum DFIGX drawdown of -19.56%. Use the drawdown chart below to compare losses from any high point for SPTI and DFIGX.

Drawdown Indicators

	SPTI	DFIGX	Difference
Max Drawdown Largest peak-to-trough decline	-16.12%	-19.56%	+3.44%
Max Drawdown (1Y) Largest decline over 1 year	-2.80%	-3.08%	+0.28%
Max Drawdown (3Y) Largest decline over 3 years	-4.35%	-5.34%	+0.99%
Max Drawdown (5Y) Largest decline over 5 years	-14.83%	-17.31%	+2.48%
Max Drawdown (10Y) Largest decline over 10 years	-16.12%	-19.56%	+3.44%
Current Drawdown Current decline from peak	-2.58%	-7.99%	+5.41%
Average Drawdown Average peak-to-trough decline	-2.92%	-3.13%	+0.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.21%	1.24%	-0.03%

Volatility

SPTI vs. DFIGX - Volatility Comparison

SPDR Portfolio Intermediate Term Treasury ETF (SPTI) and DFA Intermediate Government Fixed Income Portfolio (DFIGX) have volatilities of 0.90% and 0.89%, 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

	SPTI	DFIGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.90%	0.89%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	2.61%	2.87%	-0.26%
Volatility (1Y) Calculated over the trailing 1-year period	3.25%	3.80%	-0.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.36%	6.20%	-0.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.38%	5.34%	-0.96%

SPTI vs. DFIGX - Expense Ratio Comparison

SPTI has a 0.06% expense ratio, which is lower than DFIGX's 0.11% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

SPTI vs. DFIGX - Dividend Comparison

SPTI's dividend yield for the trailing twelve months is around 3.90%, more than DFIGX's 3.14% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFIGX DFA Intermediate Government Fixed Income Portfolio	3.14%	2.22%	2.82%	2.33%	1.78%	2.36%	4.14%	2.16%	2.19%	1.57%	1.66%	2.49%
SPTI SPDR Portfolio Intermediate Term Treasury ETF	3.90%	3.79%	3.77%	2.99%	1.45%	0.53%	0.75%	2.02%	1.97%	1.46%	1.23%	1.18%

Frequently Asked Questions

Can I hold both SPTI and DFIGX in my portfolio?

With a correlation of 0.95, SPTI and DFIGX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, SPTI or DFIGX?

SPTI has higher volatility (0.90%) compared to DFIGX (0.89%). In terms of maximum drawdown, SPTI dropped -16.12% vs DFIGX's -19.56%.

Which has better risk-adjusted returns?

DFIGX currently has the higher Sharpe Ratio (0.61 vs 0.40), 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.